Playing as white, checkmate black in 9 moves against best defense. This position came up in a game I played; I was black and my opponent missed the checkmate.
http://en.lichess.org/analysis/standard/r4rk1/1bq2ppp/n1pbpn2/pp2N3/3PNB2/P2BQ2P/1PP2PP1/R3R1K1_w_-_-_3_16mayb it aint mate in 9 you must not recapture the knight, instead just move king to the corner...
Here's the study so you can play in puzzle mode.
http://en.lichess.org/study/31Pxyfi4The computer does not see mate after Kh8. Anywyas it is hard to solve the puzzle in study move as you have to also guess the defense. Maybe just showing the game and the critical moment would be better.
A quick playthrough with the site Stockfish gives mate in 18 against its own best defence (by which time we'd all hopefully have resigned as Black):
http://en.lichess.org/study/PLUUh7s8That explains why Stockfish didnt see it here lol I dont think it is configured to see depth 18
On my computer, Stockfish sees the checkmate after 16. Nxf6+ Kh8 17. Qg3 (mate in 8). After that we have 17. ...g5 18. Qxg5 Rg8 and I leave the rest to be solved.
Ok, after 17.Qg3 even the lichess Stockfish gets it ... can hardly blame your opponent for having missed it though! ;)
I think it has to do with the way Stockfish searches and prunes move trees. In this case, it did not consider the Qg3 line well enough. Does anyone know how to report this to the Stockfish developers?
Checkmate in ,,,,,?8,9 or 10?????White to move,
http://pl.lichess.org/aNyPuGhDWbFjI have question-What elo(Player) can do it in 30 minutes?