There is no rule about perpetual check. There is the 3 position repetition rule which basically says that if a position occurs 3 times (exactly the same with castling rights, en passant possibilities and side to move the same) then either player may claim a draw. You do so by making the move that makes the 3rd repeat and claiming a draw or claiming a draw alone if the 3rd repeat is currently present.
Originally posted by XanthosNZ There is no rule about perpetual check. There is the 3 position repetition rule which basically says that if a position occurs 3 times (exactly the same with castling rights, en passant possibilities and side to move the same) then either player may claim a draw. You do so by making the move that makes the 3rd repeat and claiming a draw or claiming a draw alone if the 3rd repeat is currently present.
Sometimes with a perpetual check situation, the 50-move rule arises quicker than the 3-fold repitition.
Originally posted by Will Everitt How many games have you finished with the 50 move rule? I never have on here or OTB.
I don't think I ever have.
I don't think I've won many by 3-fold repitition either.
Most of the time, the opponent realises and accepts that it is a draw.
All I'm saying is that sometimes (rarely, but sometimes), if an opponent refuses to accept a perpetual check, the 50-move rule will kick in before 3-fold repitition.