Originally posted by David113No, that's false. You are confusing the 3-fold repetition rule with the 50-move rule.
According to the chess problemists' codex, in chess problems the threefold repetition law is used only in retros.
Article 17 - 50 Moves-Rule
Unless expressly stipulated, the 50 moves-rule does not apply to the solution of chess compositions except for retro-problems.
Article 18 - Repetition of Position
A position is considered as a draw if it can be proved that an identical position [21] has occured three times in the proof game combined with the solution.
www.saunalahti.fi/~stniekat/pccc/codex.htm
Originally posted by David113Mate in "n" moves implies that your oponent has no outs.
According to the chess problemists' codex, in chess problems the threefold repetition law is used only in retros.
after at most 7 moves your oppnent has two legal moves: shuffle the bishop, declare a draw.
as the "self mate" stipulation was not indicated the game ends on move 7 where white must mate in order to avoid a draw.
Solutions to mate in 1-7 follow fibonacci