OK, I see. After 209. b4 it should have resigned after 209... Kh1, but it doesn't. It does see that it has lost, because its last move allows a checkmate through 209... Nb3#, and it had other moves (209... Rc1) that would not result in mate. It does resign after that mate, but not on Kh1. It does announce mate when you play 209... Rc1 yourself, so that it moves 210. Kh1# for black.
This is a 'delayed win' condition, (similar to baring), as I configuerd it such that the King should reach the last rank through a legal move. I guess there is something wrong with selecting the message in that case.
OK, I see. After 209. b4 it should have resigned after 209... Kh1, but it doesn't. It does see that it has lost, because its last move allows a checkmate through 209... Nb3#, and it had other moves (209... Rc1) that would not result in mate. It does resign after that mate, but not on Kh1. It does announce mate when you play 209... Rc1 yourself, so that it moves 210. Kh1# for black.
This is a 'delayed win' condition, (similar to baring), as I configuerd it such that the King should reach the last rank through a legal move. I guess there is something wrong with selecting the message in that case.