#8 three move repetition
A game of chess can be considered a draw if an
identical position has occurred three times, or will
occur after the player on turn makes his move. I've
played several games of Brutal Chess in which the only
way to end the game was for me to intentionally make a
mistake instead of being allowed to play to a draw.
Article 9.2 states that a position is considered
identical to another if the same player is on move, the
same pieces of the same colour occupy the same squares,
and the same moves are available to each player.
Also, as a related feature, it is impossible to reach
checkmate in the cases of king versus king, king and
bishop versus king, king and knight against king, or
king and bishop versus king and bishop with the bishops
on the same color.
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This has been implemented for the next release.
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alpha 0.5 has been released and covers this feature.