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MSO Rules and Clarifications
Please see a list of rules for the Mind Sports Olympiad. If you have any queries,
please email [email protected]
The Mind Sports Olympiad Tie-Break System to be used:
A tie-break is a situation where two or more players (pairs or teams) have the same
score and are in a position to win a medal or title. The MSO tie-break rules apply.
All tie-breaks will be agreed in the office with the Chief Arbiter or a director, neither of
whom will be involved as a participant in the particular event.
The rules below will be applied for two player games:
1. Head to Head results between the players involved. This will only apply if one player has
beaten all others in the tie-break, or one player has lost to all others in the tie break.
2. Points spread from all rounds, ignoring the players best result.
3. Sonneborn-Berger.
Please note that none of these steps are reapplied. (e.g. – if one player is eliminated in head to
head, then rather than reapplying head to head, the remaining tiebreak is decided by point
spread and then Sonneborn-Berger.) After step 3, unseparated players will share medals.
The rules below will be applied for multi-player games:
1. The board played on in the final round (i.e. A player from the top board is placed ahead of
anyone on a lower board, if they have the same tournament points)
2. Result in the final round
3. Victory Points scored in all rounds/points percentage (of winner) in all rounds
4. Most Wins (followed by most seconds etc.)
5. Head to head
6. Buchholz (removing top and bottom 2 opponents)
For the Pentamind, the tie-break will be the next Pentamind score (i.e. the 6th best
result) will be used as a tiebreak; the secondary tiebreak will be the 7th best Pentamind score;
the third tiebreak will be use the 8th best scores.
International Backgammon Tournament
Rules and procedures
Tiebreak Procedure
(Please note that for tiebreaks the match score has no effect)
1. Head to Head results between the players involved. This will only apply if one
player has beaten all others in the tie-break, or one player has lost to all others in the tie
2. Sonneborn-Berger.
Please note that none of these steps are reapplied. (e.g. – if one player is eliminated in
head to head, then rather than reapplying head to head, the remaining tiebreak is decided by
point spread and then Sonneborn-Berger.) After step 3, unseparated players will share
The tournament rules and procedures cannot, and should not, regulate all possible
situations that may arise during a game or a match. No set rules should deprive the
Tournament Director(s) of his freedom of judgment or prevent him from finding the solution
dictated by fairness and compatible with the circumstances of a particular case.
The Tournament Director shall be assisted by a ruling committee set at the beginning
of the tournament with 3 to 5 players acknowledged for their expertise of tournament. The
names of players in the ruling committee shall be displayed in the playing rooms. If one
player of the committee is involved in a dispute he shall be substituted.
Inscriptions are approved by the Tournament organization that doesn't necessarily
have to give any explications about its decisions.
The official tournament languages are English and Italian. No speech in other
language is permitted between players and spectators when a match is in progress.
It is required to dress properly at all time, otherwise the access to the Tournament will
be denied.
All matches shall be played in official tournament rooms except by agreement or
decision of the tournament director.
Players must observe their seat assignment on the draw sheet.
Matches of the Championship and Intermediate take precedence.
The board of the Main will be drawn randomly.
Byes of the Progressive Consolation will be drawn if possible first among players
without a bye in the Main.
On the tournament board, late arrivals will be assigned in numerical order: the
tournament director will decide how many late arrivals to keep available and how long.
In all 13 point matches or more, each player is allowed to take two breaks of 10mn
duration each. For shorter matches each player has one break of 10mn duration. The
authorized breaks must be taken between games. If the duration of the pauses are not
respected penalties shall be awarded.
It is the responsibility of each player to be on time: you must check that the program
have not been modified. Ignorance is no defense against penalty points incurred through late
arrival. For any unjustified late arrival penalty points will be awarded as follows: 1 point
added to opponent's score for every 5mn being late, starting from the moment chosen by the
Tournament Director, considering circumstances, generally 20mn after of the scheduled
starting time. As soon as penalty points amount to more than half of the needed number of
points to win the match, the missing player will be disqualified.
In case of necessity, an hour delay could be granted by the tournament director's
decision; after the hour, penalty points will start.
If clock is in use, instead of giving penalty points, the director will start the player's
In any case, to prevent penalties, a player should secure the tournament director's
consent when leaving the playing rooms.
It is permitted to watch a match, but spectators must observe complete silence and
avoid to disturb in any way the players, otherwise they will be sent away.
The tournament director can request at any time, on his own initiative or on a player
demand, that a spectator leaves the table, for a justified reason or for a need of the
To draw attention to any misplays or make general comments on plays is forbidden.
In case of intervention of a spectator the offended player can request the tournament director
to sanction.
Except flagrant cheating, a spectator may testify only on tournament director request.
If a spectator wants to address a player, he must ask the permission of the opponent.
In case of agreement, he must use a language understood by both players.
Any indubitable signals between player and spectator will result in penalties that
could reach the player's immediate disqualification and forfeiture of any prize. The spectator
will suffer the same penalty if he takes part at the tournament.
Direction of play, choice of checkers' colors and seats shall be decided at the start of
the match and, once decided, will remain the same for the whole match. If the players
disagree on the choice, they roll the dice and the highest result decide direction, color and
You must play with the tournament equipment or with equipments approved by the
tournament director.
If you accept to play with non authorized equipments, you do it at your own
You must have at least 2 standard precision dice.
A player may ask the tournament director to change, from the next game, the
equipment he is using (or part of it) if he realizes that it is not regular or for another justified
The tournament director can also replace, on his own initiative and at any time,
defective or not regular equipment.
Disturbing and unnecessary objects have to be removed from the table surface.
Cellular phone must be turned off (or used shortly with the permission of the
opponent and avoiding any disturb); headsets and recording equipments are also prohibited if
not with the permission of the opponent.
Any help is prohibited. It is forbidden to write anything but the score.
All matches will be played to the stated number of points: in case of different
agreement, the involved players will be penalized.
If, by mistake of both players, a match has been played at a different number of points
than the stated one and the result posted in the tournament board, the loser cannot ask to play
the match again or to carry it on or that the result were changed (if the stated number of
points was smaller and the winner different); the director will give a warning to both players
and will penalize them if they do it again.
If the players realize that they are playing to a wrong number of points (but the match
is not finished yet), they have to change the number on the score sheet and carry on the match
to the correct number of points; if vice versa with the correct number the match were already
finished, the players have to keep playing till the wrong number of points they were suppose
to go to.
Each player shall keep a running score of the match, with the match length marked at
the top of the score sheet. Both players shall check their score with the opponent's score at the
start of each game. It's the leading player's duty to check if the score sheets match together: in
case of a failure the score sheet of the trailing player will be valid.
Match cards of the tournaments must be used.
Failure to keep score creates presumption in favor of an opponent in case of dispute.
If both players have a missing match length, the match will be played by default to the
stated match length.
If both players realize that they do not play to the number of points stated, the score
sheet shall be rectified and they shall play to the stated match length. The result of a match
shall be reported to the tournament director by the loser or by the winner with the score sheet.
If a player inadvertently concedes a match, even though his opponent has not reached
the requisite number of points, such concession shall be deemed valid once the name of the
winner is entered in the official draw sheet by the tournament director.
The use of flip over scoreboards is allowed and cheered; if you use both the flip over
and a normal score (to keep also track of the game "history"), in case of discordance the flip
over prevails.
Any settlement or convention between players is prohibited: no game may be
replayed, canceled or settled.
Noise, act or attitude which hinder opponent's thought and concentration are
The player should never cover the complete view of the board to his opponent: he
should for example avoid to put the cup inside the board or to keep the hand over it for too
long. The not in turn player should never touch the dies nor the pieces, not even his own.
The player should move the checkers clearly, using only one hand. Particularly, he
should avoid exceeding in tentative back and forth moves. All the moves have to be
performed regularly, in particular a checker from the bar should be played before moving any
other checker.
If legally possible both numbers on dice must be played. If only one dice or the other
can be played legally, but not both, then the highest dice must be played.
A hit checker must be placed on the bar. It is insufficient simply to tap the checker or
indicate by movement of the hand that a hit is intended. If a checker (or checkers) must be hit
legally, but is not placed on the bar the move may be considered as illegal.
Checkers born off must be out of the board and must always be kept in full view of
both players. Any checker should not be held in player's hands.
Any moves not performed properly may result in an adverse ruling in case of dispute.
The director, if informed, will warn and eventually penalize a player who makes
repetitely illegal moves.
Player concludes his turn by lifting both dice. He may reposition the dice on the right
board to facilitate thought and moving the checkers, but only flowing the dice on the playing
surface. After lifting dice, a player can't keep moving his pieces (unless the opponent demand
to replay an illegal move).
If a player notices a wrong starting position, he may correct it before the fourth roll of
the game. A player with a number of checkers different from 15 can lose gammon and
Players must play at a reasonable pace. A player may lodge a protestation with the
tournament director, if his opponent plays too slowly. The tournament director may on his
own initiative, introduce a clock to finish a game or a match.
Automatic double and beavers are not legal.
When it is the player's turn to throw dice, he may double against a close board with a
man or more on the bar. The Jacoby rule does not apply. (gammon and backgammon will
count at all times. So, a cube turn is not necessary to win gammon or backgammon)
The Crawford rule (no cube) applies: when a player reaches match point, the doubling
cube will be out of play for one game and in any subsequent games the cube may be normally
turned from the first legal opportunity.
A centered cube shall be considered with the value of 1 point.
The cube must always be kept in full view of both players.
A player can double only when the opponent concludes his turn by lifting both his
A premature double stands and the opponent can move accordingly.
A player who doubles must place the cube with appropriate value uppermost on
opponent's right board. He must wait his opponent's acceptation before rolling the dice.
A player who accepts a double must place the cube with appropriate value uppermost
on his side.
Once a player is doubled and accepts this double will be deemed valid.
A player who refuses a double must place the cube in the center of the board.
Only legal procedures shall be valid to double and to accept a double, any other shall
be deemed null and void.
During the Crawford game the doubling cube should be removed from the board; but
if, by mistake, the doubling cube has been used during the Crawford game, the player has in
any case the right to invalidate all the doubles performed during that game, if he realizes the
violation until the end of the game.
Only dice approved by the tournament director must be in use.
At the beginning of the match players choose a set of four dice, generally with 2
different colors.
Once a match is in progress dice may not be changed except at tournament director's
The tournament director has the right to introduce new dice at any time.
At the beginning of the match each player choose a die alternately. A random draw
shall be made for the one who choose first. A player must have two dice.
Cups and dice must be kept in full view of both players. Dice must be rolled on the
right side of a player's board.
Cocked dice must be re-rolled. Dice are deemed cocked if they do not come to rest
flat on the right board. If you think your dice are cocked, you must wait your opponent's
consent before rolling again. In case of a dispute, players must leave unchanged all the
equipment: any modification by a player create presumpion in opponent's favor.
At any starting game a player may request a dice mixage, with the same procedure of
the beginning of the match: he will mix the dice and his opponent will choose first.
None or nothing must interfere the movement of dice in order to stop or control them.
Before rolling both dice must be in the cup. The cup must be shaken vigorously just
before rolling. Both dice must come out simultaneously from a discernible height, without
touching hands, in order that dice roll and bounce freely on the right board.
A player concludes his move by lifting both dice. If a player rolls the dice before
the opponent has finished his/her turn, the roll may only be re-rolled if the opponent
demand so. In other words, the opponent decides whether the roll stands or has to be
A premature roller cannot use the cube and must play the premature dice when the
opponent concludes his turn.
All violations of aforesaid rules shall be sanctioned.
Any infringement by a player of the accepted standard of tournament behavior can
result in immediate disqualification and exclusion from the tournament.
When a dispute arises the tournament director must be summoned and the
players must leave unchanged dice, cube (the position in which it lies will be deemed
valid), checkers and score. Any modification by a player create presumption in
opponent's favor.
The tournament director on his own initiative or at request of a player may appoint a
neutral referee to observe a match: the referee shall have full powers to protect each
player against opponent's irregularities, illegal moves included.
The tournament director has the right to gather together the committee to adjudicate a
dispute, a claim or a protestation.
A player may appeal a director tournament's ruling, but he must appeal just after the
ruling. To resolve an appeal at least 2 members of the committee shall be convene with the
tournament director. The committee shall hear relevant testimony and arguments of both
players involved. A ruling will be taken by majority decision.
A match may be videotaped on tournament director's decision. A player cannot refuse
it, if he does he will be forfeited. If a camera is in use, it may be use in case of dispute.
On his own initiative or at the justified request of any participant of the tournament,
the tournament director may require two players to use a clock, to play or finish a match.
The clock can be introduced at the beginning of a game or during a game in progress
at the discretion of the tournament director.
A player can request any time the checking of the working of clock. In case of an
observed flaw the clock should be changed and reparation to the injured player might be
You may play with the Bronstein system. At the beginning of a match the director
will give to each player a given amount of time per point (for example 3 minutes), plus some
seconds (for example 12) of delay per move: so a 7 points match could be played with 21
minutes per player +12 sec delay per move.
The effective time will in any case be indicated by the director accordingly with the
If a player completely ends his time (his clock reaches 0), he loses the match.
If the clock is issued in the middle of a game the average needed points will be
If the tournament director notices that two players play without a clock when one is
required or they play with the wrong setting of time, penalties can be awarded to both of
Players share one pair of dice coming from a set of four. At the start of a match
players choose one die each. A random draw can be made for the first player choosing the
Either player may demand a mixing of dice prior to the start of any game, according
the same procedure of the beginning of the match.
A random draw can be done for the sense of play. The clock shall be placed on the
side of the bear-off. For a match in three sets, players may alternate the sense of play and
make a draw in case they have to play 3 matches.
At the start of each game the clock is centered and each player roll at the same time a
die. The player rolling the lower starts the opponent's time and the other player makes the
A player signals the end of his turn by pushing the clock: dice should be left on the
board. Then the turn passes to the opponent.
If a player presses the clock without rolling the dice or playing his checkers, the move
will be considered as illegal.
Dice cannot be touched before the opponent's move is complete.
If a player is against a closed board with at least one checker on the bar
− the opponent can hit the clock at each move (to always get the delay seconds);
− the player is not required to roll the dice but he still must continue to hit the clock to
signify the end of the turn; if he can use the cube he can always double.
A player who wants to double should clearly present to the opponent the cube in the
middle of the board and then push the clock.
A player who wants to accept a double should clearly take the cube on his side and
then push the clock.
A player who wants to refuse a double should clearly put the cube on the center of the
board; then he centers the clock.
Conceding a game
A player may offer to concede a plain game, gammon or backgammon only after
completing his turn and then centering the clock. To accept a concession ' opponent says
"accept", to reject says "reject". No player may refuse an opponent's concession for the
maximum possible number of points.
Claiming a game
After completing his turn, a player may claim the game when the outcome is certain.
The player claiming the game centers both buttons and says «I win the game» (or «a
gammon» or «a backgammon»).
The opponent has to verify this statement.
Stopping the clock
A player can stop the clock for the following reasons :
make a proposal of concession of the game;
to retrieve a fallen die or checker;
to contest an opponent's action: or example, after an illegal move of the opponent, the
player has the right to demand the rectification without losing time;
to summon the tournament director;
to announce the intention to take a break (when taking a break, it is counseled to both
players to write down on their score sheets their time until expiration of the match).
The Decamentathlon World Championship comprises 10 events each scored out of
100 (for a maximum score of 1000), lasting 3.5 hours and largely consisting of examined
papers. The following mental skills are tested in the Decamentathlon:
1) Memorizing cards, Memorizing numbers (base-10)
2) Draughts (have rules defined on website)
3) Mental calculation
4) Creative Thinking
5) Chess
6) Go
7) Mastermind (6 colors)
8) KenKen
9) Sudoku
10) Backgammon
The Decamentathlon provides the opportunity for players to show how good an allrounder they are.
The Rules of Draughts (EDA)
Draughts Board and men
2.2The draughts board is square in shape and is divided into 64 squares of equal size,
alternately light and dark in colour. (Technically called white and black.)
2.3The board is placed between the two players such that the bottom left-hand corner
square is black.
2.4The game is only played on the black squares, which for the purpose of reference
are assigned numbers from 1 to 32.
2.5 Each player starts with 12 discs, or men, all of equal size. One player has dark
coloured men (called black), and the other has light coloured men (called white). The colours
of the men must make a distinct contrast with the colours of the squares of the board.
At the start of play the black men occupy squares 1 to 12 and the white men
occupy squares 21 to 32.
Order of Play
2.7To start the game the players decide by the toss of a coin which colour they will
play. In subsequent games the players alternate colours.
2.8The first move in each game is made by the player with the black men. Thereafter
the moves are made by each player in turn.
The Moves
There are fundamentally 4 types of move: the ordinary move of a man, the
ordinary move of a king, the capturing move of a man and the capturing move of a king.
2.10The ordinary move of a man is its transfer diagonally forward left or right from
one square to an immediately neighbouring vacant square.
2.11When a man reaches the farthest row forward (the king row or crown head) it
becomes a king, and this completes the turn of play. The man is crowned by the opponent,
who must place a man of the same colour on top of it before making his own move. (It may
be necessary to borrow from another set if no captured man is available for the purpose.)
2.12The ordinary move of a king is its transfer diagonally forward or backward, left
or right, from one square to an immediately neighbouring vacant square.
The capturing move of a man is its transfer over a diagonally adjacent and
forward square occupied by an opponent's piece (man or king) and on to a vacant square
immediately beyond it. A capturing move is called a 'jump'. On completion of the jump the
captured piece is removed from the board.
2.14The capturing move of a king is similar to that of a man, but may be in a forward
or backward direction.
2.15If a jump creates an immediate further capturing opportunity, then the capturing
move of the piece (man or king) is continued until all the jumps are completed. The only
exception is that if a man reaches the king row by means of a capturing move it then becomes
a king, but may not make any further jumps in the same turn. At the end of the capturing
sequence, all the captured pieces are removed from the board.
2.16All capturing moves are compulsory, whether offered actively or passively. If
there are two or more ways to jump, a player may select any one he wishes, not necessarily
that which gains the most pieces. Once started, a multiple jump must be carried through to
Touching Pieces
2.17Either player, on intimating his intention to his opponent, is entitled to adjust his
own or his opponent's pieces properly on their squares at any time during the course of the
2.18If a player on his turn to move touches a piece he must play that piece, unless he
has given an adjustment warning. If the piece is not legally playable, Rule 20ii applies.
2.19If any part of a playable piece is played over a corner of the square on which it is
stationed, the move must be completed in that direction.
False, Improper or Illegal Moves
2.20A player making a false, improper or illegal move shall be cautioned for the first
offence, and then the move recalled. If the caution and recall of such a move does not take
place before the opponent makes his next move then the move is allowed to stand and the
game continues as normal. The offending player shall forfeit the game for any subsequent
false, improper or illegal move made in that game. This applies if, for example, a player:
Omits to capture or to complete a multiple capture.
On his turn to play touches an unplayable piece.
iii.Moves a piece, either in an ordinary move or in a capturing move, on to a wrong
Moves an uncrowned man backwards.
v. When capturing, removes an opponent's piece or pieces not in a position to be
captured by that move.
When capturing, inadvertently removes one or more of his own pieces.
vii.Continues a capturing move through the king row with a man not already crowned.
Moves a piece when it is not his turn to play.
2.21If any of the pieces are accidentally displaced by the players or through a cause
outside their control, the pieces are replaced without penalty and the game continued.
2.22A player who refuses to adhere to the rules shall immediately forfeit the game.
The Result of the Game
There are two states to define: the win and the draw.
2.24The game is won by the player who can make the last move; that is, no move is
available to the opponent on his turn to play, either because all his pieces have been captured
or his remaining pieces are all blocked. 'Last move wins!'
A player also wins if his opponent:
i. Resigns at any point,
ii. Forfeits the game by contravening the rules.
iii. Fails to reach the time control when using a clock.
2.26 The game is drawn if, at any stage, both players agree on such a result. (This
usually occurs when neither side can force a win.)
2.27The game shall be declared drawn if, at any stage, a player can demonstrate to the
satisfaction of the referee that both the following conditions hold:
i. Neither player has advanced an uncrowned man towards the king row during his
own previous 40 moves.
ii.No pieces have been removed from the board during the previous 40 moves of each
2.28The game shall be declared drawn if, at any stage, a player can demonstrate to the
satisfaction of the referee that with his next move he would create the same position for the
third time during the game.
2.29In the case of Rules 27 and 28 the referee shall check the player's claim while his
clock is running. Should the claim prove unsubstantiated, the game shall be continued,
subject to the player still having time remaining on his clock.
Lines of Action
Lines of Action World Championship
6 rounds, 25minutes + 5seconds-per- move
* The touch-move rule will apply
* If an illegal move is made, in the 1 st instance this will be a warning only. Simply
restart your opponent's clock
and point out the illegal move. On a 2 nd instance, two minutes will be added to the
opponents' clock. On a 3 rd
instance, an illegal move will result in the game being forfeited.
* If a move results in simultaneous connection for both sides, this will be a draw
Swiss tournament, with 6 or 7 matches. Till 8 players will be all play all.
In any case the precise number of matches will be confirmed before the start.
1VP for the winner, 0 for the loser, ½ VP each in case of a 24-24 draw.
The object of the game is to capture more pieces than your opponent.
The board consists of two rows of six cells, holes or cups. Each player owns a row.
There are two extra cells, not part of the board proper, for holding each player's captives.
The pieces are all alike. They are sometimes referred to as stones, pebbles or seeds.
There are 48 in all.
Arrangement of board at the beginning of each game or round:
Four seeds are placed in each house on a board that is made up of two rows of six
houses making twelve in total. Each row of six houses is the territory of the player sitting
nearest to them. With two end houses used as stores for captured seeds.
The object of the game is to capture as many seeds (nickers) as possible. The first
player to capture 25 seeds or more wins the game. A draw is possible in this game with each
player capturing 24 seeds. Seeds are captured, by making two's or three's with ones last seed
on the opponent's side.
Oware consists of fourteen depressions {houses} for a standard board or twelve for
most portables, scooped in the ground or carved out of a board. These are arranged in two
rows of six houses, each player having six houses facing them in the case of the portable
boards. For the standard board the two extra houses used for storing captured seeds are
placed at either side of the board in-between the two rows. The game is played with 48 seeds
{nickers}, with 4 seeds placed in each house.
To start the game both players have to decide who should start. This can be done by
the toss of a coin or by mutual agreement. In subsequent games the winner starts. Once it has
been decided who should start that player can pick up from any one of the 6 houses in front
of them that makes up their territory. Once the house has been selected all the seeds have to
be scooped and sown in an anti-clockwise direction, in a consecutive manner placing the first
seed in the house to the right of where they were scooped from. The remainder of the seeds,
are placed in the houses directly following each other without skipping a house.
Omitting a house
The only exception is when a house that is being played has more than 11 seeds in it.
With this situation one will be able to place a seed in each house until one comes to the
original house that one scooped the seeds from, the next seed is not placed in this house but
in the one after it. The same is repeated on subsequent rounds.
Capturing seeds
One captures seeds, by making a two or three with ones last seed on the opponents
side. Take note if one makes a two or three but has seeds left to sow one does not gain
Multiple Capture
If one makes a two or three with ones last seed and the house or houses preceding the
captured house on the opponents side also have twos, threes or any combination of them, one
captures these as well. So long as there are no houses with less than two or more than three
seeds, in-between them, a maximum of five houses can be captured in this way. Beyond five
houses one forfeits everything, as this would leave the opponent with no seeds to play with.
In other words, capturing all the opponents' seeds is not allowed (Grand Slams are not
allowed "You may not starve your opponent").
Compulsory moves
Providing you have an alternative move available, it is illegal to make a
move that will 'starve' your opponent of seeds, that is to leave them with
no seeds, and hence no move. This includes both the situations of a 'Grand
Slam', as described above, or where the opponent has no seeds on their
side at the start of your turn, and you have the option to provide one.
It is possible to create a situation where your opponent has no seeds on
their side, and your only available moves will starve your opponent of
seeds. In this case, any of those moves now become legal. Your opponent
will then have no available move on their turn, you capture all remaining
seeds, and usually win the game (although this can result in a tie). In a
close game, this is one of the more usual ways of securing victory.
End game
The game ends when one player has captured 25 seeds or more. When both players
decide that continuing will only lead to going round in circles in such a case each player
keeps the seeds on their side.
During your turn you are free to count the seeds in all the 12 holes.
As soon as you start picking up the seeds from a hole, that will be your move, you
can't change your mind.
If you need to pick up some seeds in one of your holes to better counting, you have to
announce that to you opponent, otherwise you will forced to make that move.
You are never allowed to pick up seeds from your opponent's holes for counting, but
you can ask your opponent to do so.
When you are not in turn, you never can't touch any seed in your opponent's holes; if
your opponent agrees, you can only arrange the seeds in your holes, for a better visual
When a player reaches 25 seeds, the game ends, no need to carry for scoring
When a final situation which only lead to going round in circles is recognized, the
game is over; if the other player disagrees, the director will be summoned to judge.
Each player has 15 minutes.
If your time expires, all the remaining seeds will be credited to your opponent. So it
could still be a draw.
If a player doesn't claim his win, at the end of the game the arbiter will count: the
player with the most seeds captured is the winner.
If at the end of the tournament 2 or more players have the same number of VPs, the
general MSO criteria will be applied.
Go 19×19
10.15am to 6pm (lunch break 1.30pm-2.15pm)
£15 (AM+PM; register for Double Session)
Swiss pairings over 4 rounds with a 40 minute time control per player. 4 rounds with
a 40 minute time control.
Go 9×9
10:15am to 1:45pm
Swiss pairings over 4 rounds with a 20 minute time control.
Go 13×13
2:15pm to 6:00pm
Swiss pairings over 4 rounds with a 20 minute time control.
The tournament will be run over three rounds.
Round 1 will be allocated splitting the best ranked players in different tables.
Round 2 will have a 1st/2nd/3rd/4th classified player in round 1.
Round 3 will be allocated swiss style, with the "final table" with the 4 players with the
best score so far. The gold medal will go to the player with the most points among the
finalists. Silver and bronze medal will go to the players with the most points (apart from the
gold medalist).
Players registered at the tournament are expected to know how to play.
The scoring system used is: take your money at the end of the game and divide by the
total money held by all four players. For the winner, a notional 6% is added to their portfolio
when calculating the above score, though this is not added to the total amount of money in
the game.
All tournament games will be between 4 players if possible. In the event of the
number of entrants not being a multiple of four, then there will be three player boards as
required to make the count correct. All scores in a 3 player game will be multiplied by ¾ to
normalize the results.
The tournament is being run to the standard game rules as per the 1976 Avalon Hill
Seating is determined by each player drawing a tile at random. The lowest numbered
tile starts. In the case of a tie, the players drawing the tile with first letter starts. Other players
sit in ascending order round the table from the starting player. These tiles are placed on the
board. If 2 (or more) of these tiles are adjacent, they do not form a hotel chain. Instead, a
player must add another title to the group to form a chain. In the 2nd and 3rd round seating
order could be decided by the arbiter and recorded and that way the luck of position would be
evened out by balancing out seating order like chess does with black and white balancing!
Your turn ends when you pick up a replacement tile. Play then passes to the next
player, and shares can no longer be purchased.
Games are played with all shareholdings open.
Providing the end game conditions from the rules, a player has the option of ending
the game!
If you do end the game, you may end it at any point in your turn, even before playing
your tile.
If a tile merges 3 or 4 chains, the largest chain takes over the others. It takes over the
subsidiaries from largest through to smallest. In the case of a tie the player who laid the tile
chooses the order.
If a player exceeds in thinking, the opponents are requested to inform the tournament
director, who has the right to put the slow player on the clock (poker style).
It's not allowed to take notes (in any way) during the game, apart from the case in
which the game is interrupted.
Talking. It is not allowed to give suggestions, tips or explanations about how to play
to any player in any moment, neither at the end of the move. Should a player break this rule,
the opponents are requested to inform immediately the tournament director.
The tournament director can penalize players (for any infringement) deciding an
amount of money to be subtracted to their score at the end of the game.
Penalties are at discretion of the arbiter
Wrong position of a tile: it's responsibility of all the players. The director will judge
accordingly with the situation.
It is a one session event, with 20 minutes per player sudden death. This includes score
calculation (the player who scores, must first tallies points before pressing the clock). The
event will comprise 4 rounds.
Swiss pairings will be used, and seeds if possible.
If the round is being slowly played, then a time monitor can be requested to ensure
that players maintain a reasonable pace.
In a one session event, there will be four rounds.
The victory points from each table will be distributed as follows:
1 for winner
0 for the loser
(point difference is recorded)
Kamisado is an abstract strategy board game for two players that's played on an 8×8
multicoloured board invented by Peter Burley who will be giving free demos of this game
during the Mind Sports Olympiad. Each player controls a set of eight octagonal dragon tower
pieces. Each player's set of dragon towers contains a tower to match each of the colours that
appear on the squares of the board (i.e., a brown tower, a green tower, etc.). One player's
towers have gold dragons mounted on the top, while the other player's towers are topped with
black dragons.
The player with the black dragons moves first and may choose any tower. From this
point onwards, each player must move the dragon tower that matches the colour of the square
that the opponent's last move finished on. The object of the game is to reach your opponent's
Home Row with one of your dragon towers. The first player to achieve this goal is the winner
of the round.
1) The board is set up as for 'standard' Kamisado, with all the towers on their
matching squares (i.e. Brown on Brown etc.) on the two Home Rows.
2) Black starts as usual.
3) Black's first move has a maximum length of one space.
4) Then White's first move has a maximum length of three spaces.
5) Black's second move has a maximum length of five spaces.
6) All subsequent moves have a maximum move length of seven spaces (i.e. play
proceeds as normal from this point onwards).
Mensa Connections
Swiss tournament, with at 6 matches. Till 10 players will be all play all.
In any case the precise number of matches will be announced before the beginning.
For what is not specified here, regular rules are in use.
Each match consists of one game.
The scoring charts are placed beside the board, both in the same side, with the same
orientation and visible to both players.
The first-named player plays first.
Each tile can be placed so that it touches any tile that is down or one of the special
colour start cells.
A player may change his rack if he has none of the colours of which he has the fewest
points in, otherwise a players rack is replenished at the end of his turn.
A tile may be played for 0 points!
If a player gets a colour to 18 he get another go but without replenishing their rack. It
is possible to have more consecutive go.
If a player gets 2 colours to 18 with the same move, he only gets another go.
The game continues until there is no room left on the board or a player gets 18 in all
of the six colours.
The score is worked out on the backmost colour and the winner is the player with the
highest among the lowest value; in case of a tie you go ahead with the second backmost
colour, and so on.
The winner gets 1VP, while his opponent gets 0 VPs. In case of a draw (only if all the
6 colors are in the same position!), both get ½ VP.
At the end of each game the levels of the backmost colors and their differences are
Each player has 10 minutes+10 seconds per move.
During his time the player declares aloud his score and moves the cubes (the
opponent has to check in this very moment).
If the player wants to change his rack, he has to declare it and to show his tiles before
pressing the button.
As a player press the button, he only can replenish his rack.
If a player runs out of time, he stops playing and his opponent carries on playing till
the game ends or his time expires. The winner is then decided in the usual way.
If at the end of the tournament 2 or more players have the same number of VPs, the
following criteria are used in order as tie-breakers:
1. Head to Head results between the players involved. This will only apply if one
player has beaten all others in the tie-break, or one player has lost to all others in the tie
2. Points spread from all rounds, ignoring the players best result. The difference
between the position of the backmost color of the winner and the position of the back most
color of the loser (this difference can also be 0, when the 2 back most colors are in the same
line and the victory is determined by the 2nd (or 3rd, or more) back most color.
3. Sonneborn-Berger.
Please note that none of these steps are reapplied. (e.g. – if one player is eliminated in
head to head, then rather than reapplying head to head, the remaining tiebreak is decided by
point spread and then Sonneborn-Berger.) After step 3, unseparated players will share
The opening position for Abalone at MSO is the Belgian Daisy opening:
Swiss tournament, with 6 matches. Till 10 players will be all play all.
In any case the precise number of matches will be announced before the start.
For what is not specified here, regular rules are in use.
Each match consists of two games.
The first-named player is Codemaker in game 1 with the roles reversed in game 2.
Eight colours are in use, no blanks.
The code may include repeated colours.
The Codemaker secretly sets a code, then – when the Codebreaker declares to be
ready - he starts the opponent's clock.
The player who has solved the code with less attempts wins the match and gets 1VP,
while his opponent gets 0 VPs. In case of a draw, both get ½ VP.
During his time the Codebreaker is free to manipulate pegs at will, he can arrange
them on the table or over the board as well (but at the end he has to leave on the board only
the new attempt).
The Codebreaker is not allowed to write anything and to use any other support: he can
just manipulate the pegs.
When he presses the clock, his turn is over: he is not allowed to do anything but
thinking during the Codemaker's time.
The Codemaker inserts the marker pegs in the appropriate holes in any order.
When he presses the clock, his turn is over: he can no longer change his answer.
The Codebreaker has 8 minutes.
The Codemaker has 4 minutes.
If the Codebreaker's time expires before he has solved the code he will be recorded as
having scored 13 attempts.
If the Codebreaker fails to solve the code within the 12th line (the last on the board),
he will be recorded in any case as having scored 13 attempts.
If both players score 13 attempts, both have lost and get 0 VP.
If the Codebreaker founds that the Codemaker has marked an attempt incorrectly
(either during his time or at the end of the game), the Codebreaker is credited with having
solved the code on the following line unless the code was correct on the line incorrectly
Example: Codemaker incorrectly marks line 3. Codebreaker is credited with having
solved the code in four attempts. If the incorrectly answered code was the right code to be
solved (that is, the Codemaker did not realize that the code has already been solved), the
Codebreaker is credited with the correct number of attempts and the Codemaker is penalized
by ½ VP.
If the Codemaker's time expires before the end of the game, the current attempt is
considered incorrectly answered.
Prizes and Tiebreaks
Junior (18 & under) and Senior prizes are applied based on the participant's age as of
the opening ceremony date. Money is always split but medals are determined via a tie-break
if necessary.
Mental Calculations
Pentamind WC and Euro WC
Pentamind can only use at most 3 games from the Eurogames World Championship
list. Please note that meta events such as the Amateur Poker WC will not count towards the
Pentamind. In Euro you can use expansion and its original ( e.g. - Settlers + Cities and
Knights) but in the Pentamind you cannot use both the original and its expansion (e.g. - Only
one Dominion)
Pentamind scores will be applied if a player starts an event and drops out with less
than 50% of the rounds played in order to encourage players to fully participate even in one
event doesn't help their Pentamind score. Dropping out less than half way will be allowed if
there is a sufficient excuse and the head arbiter agrees.
Chess Blitz
Illegal move loses game
960 and Rapid Chess
Illegal move gets warning and 2 min increment to opponent
In Chess960, each player may castle once per game, the same as standard chess,
moving both the king and a rook in a single move; however, the castling rules were
reinterpreted in Chess960 to support the different possible initial positions of the king and
rook. After castling, the king and rook final positions are exactly the same as they are in
standard chess. Thus:
After a-side castling, the king finishes on the c-file (c1 for White, c8 for Black) and
the a-side rook finishes on the d-file (d1 for White, d8 for Black). The move is
notated 0-0-0 and is known as queenside castling in standard chess.
After h-side castling, the king finishes on the g-file and the h-side rook finishes on the
f-file. The move is notated as 0-0 and is known as kingside castling in standard chess.
Castling in Chess960 has the same prerequisites as castling under standard chess
rules, namely:
The king and the castling rook must not have previously moved, including having
castled. The castling rook must be on the same rank as the king.
No square between the king's initial and final squares (and including them) may be
under attack by an enemy piece.
All squares between the king's initial and final squares (including the final square),
and all squares between the rook's initial and final squares (including the final
square), must be vacant except for the king and castling rook.
Exchange Chess
For exchange chess:
Players can talk in any language that they want (even creating a code).
Time is 5 minutes
Pawns can be placed up to the 7th rank, and do get promoted (though we keep them
as a pawn on the board, and they return as a pawn when taken)) So, if you promote a pawn as
queen, rook or knight, and it is not taken immediately (in normal games used to happen, but
in "exchange chess" may pass many plays without it...), both players must remember.
A piece can be placed with check but not with checkmate.
Castling is as with normal chess and can only be done with the original rook and king
if they have not moved.
Hare and Tortoise
I will direct the tournament and the following rules and scoring will apply:
The tournament will consist of four games lasting not more than 50 minutes each.
Players will be allocated to as many tables of four as possible and as few of three as
Before each round all the players will be arranged in ranking order. For the first round
the order will be random. In subsequent rounds they will be ranked in descending
order of total match points, with ties broken by carrot-count (the fewer the better).
Starting at the top of the ranked list the first four will be allocated to table 1, the next
four to table 2, and so on. If and when 3, 6 or 9 players remain they will be similarly
allocated to tables of three.
At each table the lowest-ranked player will play first, then the next lowest, and so on,
the highest-ranked playing last.
Any player joining the tournament part way through will start with 0 match points and
0 carrots and be inserted in the ranking order accordingly. (Thus they will be above
any players who have come last in all their games so far and below everyone else.)
Any player leaving the tournament before the end will be removed from the ranking
Games will not be played against the clock but on appeal the tournament director may
demand a player either move within one minute or start again (with 65 carrots but
without replacing used lettuces).
Rules of play will be exactly as printed in the published rule sheet. In case of
conflicting interpretations the tournament director's decision will be final.
A game ends as soon as all players but one have reached home and the remaining
player has made one more move (to reduce the penalty of carrots left in hand).
10. First home scores 4 points, second 2, third (at a 4-player table) 1, fourth (or third at a
3-player table) 0. If anyone fails to reach home within the allotted time points will be
awarded on relative final positions.
11. Number of carrots left in hand will be recorded, aggregated, and, if necessary, used to
break ties at the end of the tournament. Any lettuce left in hand will count as 10
12. Mobile phone warning. Any player whose mobile phone makes a sound during play
will lose their game without redress.
15 mins per player per round
Order/Chaos is pre determined by pairings, as black/white in chess.
Tie break is head-to-head followed by points difference (ignoring best
result), then Sonneborn-berger, if required.
If Choas times out then Order gets to place the pieces and make his own
moves, they are not placed randomly. You have the rest correct.
1) Seeding is applied to the first two rounds of six ONLY. Seeding by results from
last few years and then "best guess" down to last player. The two-round rule helps with
pairing and minimises bruised feelings from players who think they should have been
seeded...but weren't! This is how I've applied it to every tournament I control and believe it to
be both consistent and fair.
2) For play-order, "White" = Chaos in the 1st game, Order in the 2nd
3) If a player runs out of time, there is no need to press his/her clock, just leave it
running. But if the clock is pressed, the other player can just press it again.
4) If both players run out of time, call referee. The referee will nominate a square
(starting from the top-left unfilled square from any perspective he chooses). This is done
BEFORE drawing the counter. Counter is then drawn by referee and placed. Repeat until
board is filled. You'll note that this is not fully random.
Otherwise all good. You'll note that it is a serious error to run out of time as Chaos
(unless there are only one or two counters to play), because Order gets to draw, place AND
move! The penalty for running out of time as Order is usually less severe. Running out of
time is rare, though.
Entropy World Championship
6 rounds, 15 minutes per player per half-round
ROUND 1 14:15
ROUND 2 15:30
ROUND 3 16:45
(Get dinner after this round, but be back for 19:00!)
ROUND 4 19:00
ROUND 5 20:15
ROUND 6 21:30
* Chaos should avoid dropping the bag below the level of the table or excessively
rattling the counters in the
bag, especially when their opponent's clock is running. When the counter is removed
from the bag, please show
the counter to your opponent as a courtesy.
* As Order, the touch-move rule will apply (unless the counter cannot be moved)
* As Chaos, if a counter has not been released on the board it can be moved, but once
released it may not be
* Please report results and individual scores (used for tie-breaks) BEFORE discussing
the game with opponent!
If either player runs out of time, the game is not automatically lost. Either keep the
clock running OR press the
clock after each move (in which case the opponent can immediately restart the clock).
- Order has run out of time: Chaos draws a counter and places it on any empty space.
Order does not get to
- Chaos has run out of time: Hand the bag over to Order (you may pause the clock
while this is done). Order
now draws a tile, places it on any empty space and then makes any legal move.
- Both players have run out of time: Call the arbiter who will randomly draw counters
and fill the board, always
choosing empty spaces stating from the top-left to the bottom-right (from any
perspective of the arbiters'
choosing provided it is followed consistently).
When the board is full, the game is scored in the normal way.
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