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On my quick analysis with engine at the background, this seems to be a forced win as long as the position is not oversimplified. Just exchange one rook and maintain 1 R + N + B. The game seems to be a forced win for black. [Event "i7-5960X 4.5GHz / 2x 2080 Supe"] [Site "i7-5960X 4.5GHz / 2x 2080 Sup...

q3r2k/1R4p1/2n1p2p/3pP2P/5PP1/p1P1n1B1/R7/1Q4K1 w - - At this point of the game, Lc0 is already too passive and is losing. Too late to save the game. There are 8 or 9 winning moves together with Rxg7. This could be the reason why Rxg7 is not picked up quickly, because position of white has overwhel...

The King and other old versions of Chessmaster from CM9000 up to the last version I think.

I analyzed this game again, there is no big nor any obvious blunder committed by Stockfish 11 here. It just lost, probably horizon problems up to endgame. Thanks for that entertaining game. here's another one where SF11 was crushed in a B vs R exchange sacrifice of Lc0. Don't know where SF11 made mi...

Thanks for the solutions posted. Could be a cook due to many alternative quick mates. Yes i agree with your line, maybe your mate in 17 solution was the intended solution by the composer with B promotions twice: [Event "Puzzle"] [Site "Talkchess"] [Date "2020.06.23"] [Round "?"] [White "SF"] [Black ...

Thanks for that entertaining game. here's another one where SF11 was crushed in a B vs R exchange sacrifice of Lc0. Don't know where SF11 made mistake but it reported +5 eval then after a few moves realized SFs own eval was wrong, SF was actually losing. [Event "?"] [Site "?"] [Date "2020.06.15"] [R...

+M25 7R/p7/Ppp1B1p1/R1n1B2r/4kP1P/3p1p1P/3prp2/3Kb2N w - - 0 1 [Event "Talkchess"] [Site "M25 Puzzle"] [Date "2020.06.21"] [Round "?"] [White "SF"] [Black "SF"] [Result "1-0"] [BlackElo "2400"] [Time "22:32:32"] [TimeControl "480+5"] [SetUp "1"] [FEN "7R/p7/Ppp1B1p1/R1n1B2r/4kP1P/3p1p1P/3prp2/3Kb2N ...

Thanks for that link. Seems there are unsolved puzzles there too. http://jornalheiros.blogspot.com/p/chess-problems.html Mate puzzles but some were already solved in comment section of the blog. Here's the possible Mate in 63 and also M62 solutions (using SF and manual analysis) There's a glitch in ...

+M27 [Event "M27 Puzzle"] [Site "Talkchess"] [Date "2020.06.20"] [Round "?"] [White "SF"] [Black "SF"] [Result "1-0"] [BlackElo "2400"] [Time "21:28:45"] [WhiteElo "2400"] [TimeControl "480+5"] [SetUp "1"] [FEN "k4n2/ppp1NK1p/2pB2p1/1Q6/3p4/4rpb1/RP3rP1/4q1nb w - - 0 1"] [Termination "normal"] [PlyC...

Here's the possible Mate in 63 and also M62 solutions (using SF and manual analysis) There's a glitch in M62 puzzle. My interface keeps on reporting 50-move-rule draw, because there's no capture. Maybe that, or there is a more efficient mate reaching M62 with captures somewhere. [Event "+M63 Puzzle"...