White to move and Win ? for master engines and human

[Chessqueen]

This puzzle is for Human master and engine rated between 2200 thru 2250 to solve to solve it without using any engine, but I know that most of you will immediately cheat and use and engine to see the solution

[pgn][Event "Computer chess game"] [Date "2024.01.27"] [Round "?"] [White "Engine"] [Black "Human"] [Result "*"] [BlackElo "2450"] [Time "16:35:48"] [WhiteElo "2250"] [TimeControl "900+15"] [SetUp "1"] [FEN "R7/P7/8/8/2q5/5K2/8/7k w - - 0 1"] [Termination "unterminated"] [PlyCount "0"] [WhiteType "Engine"] [BlackType "human"][/pgn]

[Ajedrecista]

Hello:

For what I understood from the position, the real challenger move is not 1.- Rh8+, which is quite evident. It is after 1.- ..., Kg1 (1.- ..., Qh4 obviously discarded), then what move in order to avoid draw by perpetual checks. I mean, to find a way to get advantage of the cornered king.

2.- Rh1+! is the real cracker here. After 2.- ..., Kxh1; 3.- a8=Q, there is a sort of X-ray attack (probably other name for this tactic) featuring the light squared long diagonal: wQa8, wKf3 and bKh1, threatening a checkmate in the corner. If the black's queen gives check, the white's king escapes with a discovered check, thus gaining the initiave; OTOH, if black does not give check, it is white's turn to start giving checks and preparing the checkmate.

[pgn][Event "?"] [Date "?"] [Round "?"] [White "?"] [Black "?"] [Result "1-0"] [SetUp "1"] [FEN "R7/P7/8/8/2q5/5K2/8/7k w - - 0 1"] 1. Rh8+ Kg1 (1. ... Qh4 {Makes things easier for white.}) 2. Rh1+ (2. a8=Q Qe2+ 3. Kxe2 {Stalemate, but there are other options.}) Kxh1 3. a8=Q Qf1+ 4. Kg3 Kg1 5. Qa7+ Kh1 6. Qh7+ 1-0[/pgn]

Regards from Spain.

Ajedrecista.

[Chessqueen]

This puzzle is for Human masters, Please do NOT see the solution with a strong Engine. Which is better here, the Black Side with Knight or the White Side with the Bishop? White to Move

[pgn][Event "Bishop Vs Knight"] [Date "2024.01.31"] [Round "?"] [White "Human Masters"] [Black "Human Master"] [Result "*"] [BlackElo "2000"] [Time "18:12:38"] [WhiteElo "2000"] [TimeControl "900+10"] [SetUp "1"] [FEN "8/7k/4pn2/3p1p2/3P1P2/4P1Pp/7P/2B3K1 w - - 2 1"] [Termination "unterminated"] [PlyCount "0"] [WhiteType "human"] [BlackType "human"] *[/pgn]

[Chessqueen]

This puzzle is for Human masters, Please do NOT see the solution with a strong Engine. Which is better here, the Black Side with Knight or the White Side with the Bishop? White to Move

[pgn][Event "Bishop Vs Knight"] [Date "2024.01.31"] [Round "?"] [White "Human Masters"] [Black "Human Master"] [Result "*"] [BlackElo "2000"] [Time "18:12:38"] [WhiteElo "2000"] [TimeControl "900+10"] [SetUp "1"] [FEN "8/7k/4pn2/3p1p2/3P1P2/4P1Pp/7P/2B3K1 w - - 2 1"] [Termination "unterminated"] [PlyCount "0"] [WhiteType "human"] [BlackType "human"] *[/pgn]

Most of you except Ajedrecista and Mr. Kaufmaun without using engines are NOT so great at Endgame. But of course My excuse is that I am a really weak chess Player, But I did Know that a Knight is better than a Bishop when the position is Closed

[pgn][Event "KNight Vs Bishop"] [Date "2024.01.31"] [Round "?"] [White "RubiChess-20240112_x86-64-avx2"] [Black "Obsidian10-avx2"] [Result "0-1"] [BlackElo "3585"] [Time "19:34:43"] [WhiteElo "3585"] [TimeControl "300+7"] [SetUp "1"] [FEN "8/7k/4pn2/3p1p2/3P1P2/4P1Pp/7P/2B3K1 w - - 0 1"] [Termination "normal"] [PlyCount "33"] [WhiteType "program"] [BlackType "program"] 1. Bb2 {(Bc1-b2 Nf6-g4 Bb2-c1 Kh7-g6 Kg1-f1 Kg6-f7 Bc1-a3 Ng4xe3+ Kf1-g1 Ne3-g4 Ba3-b2 Kf7-e7 Bb2-c1 Ke7-d7 Bc1-a3 Kd7-e8 Kg1-h1 Ke8-f7 Ba3-b2 Kf7-e7 Bb2-a3+ Ke7-f6 Ba3-b4 Kf6-f7 Kh1-g1 Kf7-g7 Kg1-f1 Kg7-h7 Bb4-c5 Kh7-g6 Kf1-g1 Kg6-f6 Bc5-a7 Kf6-f7 Kg1-f1) -3.65/34 5} Ng4 {(Nf6-g4 Kg1-f1 Ng4xe3+ Kf1-g1 Ne3-g4 Bb2-c1 Kh7-g8 Bc1-a3 Kg8-f7 Ba3-b2 Kf7-e8 Bb2-c1 Ke8-d7 Kg1-h1 Kd7-c6 Bc1-a3 Kc6-b5 Ba3-f8 Kb5-c4 Bf8-g7 Kc4-d3 Bg7-h8 Ng4-e3 Kh1-g1 Kd3-c3 Kg1-f2 Ne3-g4+ Kf2-g1 Kc3-c4 Kg1-h1 Kc4-b5 Kh1-g1 Kb5-c6 Bh8-g7 Kc6-d7 Bg7-e5 Ng4-e3 g3-g4 f5xg4 f4-f5 e6xf5 Kg1-f2) +5.01/54 25} 2. Ba3 {(Bb2-a3 Kh7-g7 Ba3-d6 Kg7-g8 Bd6-c7 Kg8-f7 Kg1-h1 Kf7-e8 Kh1-g1 Ke8-e7 Bc7-a5 Ke7-d7 Ba5-c3 Kd7-c7 Bc3-e1 Kc7-c6 Be1-b4 Kc6-b5 Bb4-d6 Kb5-c4 Bd6-c7 Kc4-d3 Bc7-a5 Ng4xe3 Ba5-b6 Kd3-e2 Bb6-a5 Ne3-c2 Ba5-b6 Ke2-f3 Kg1-f1 Kf3-e3 Kf1-g1 Ke3-e2 Bb6-a7 Nc2-e3 g3-g4 Ne3xg4 Ba7-c5 Ke2-f3 Bc5-e7 Kf3-e4 Be7-h4 Ke4xd4 Bh4-g3 Kd4-e4 Kg1-h1 Ke4-e3 Bg3-e1 d5-d4 Be1-a5 d4-d3 Ba5-e1 d3-d2) -6.18/36 104} Kg6 {(Kh7-g6 Kg1-h1 Ng4xe3 Ba3-c1 Ne3-g4 Kh1-g1 Kg6-f7 Bc1-d2 Kf7-e8 Bd2-c1 Ke8-d7 Kg1-h1 Kd7-c6 Bc1-a3 Kc6-b5 Ba3-f8 Kb5-c4 Bf8-g7 Kc4-d3 Kh1-g1 Ng4-e3 Kg1-f2 Kd3-d2 g3-g4 f5xg4 Bg7-h8 Ne3-f5 Bh8-e5 Kd2-d3 Be5-f6 Kd3-e4 Bf6-h8 Nf5xd4 Kf2-g3 Nd4-e2+ Kg3xg4 d5-d4) +5.28/50 19} 3. Be7 {(Ba3-e7 Kg6-f7 Be7-h4 Kf7-e8 Bh4-g5 Ke8-d7 Bg5-h4 Kd7-c6 Bh4-e7 Kc6-b5 Kg1-h1 Kb5-c4 Be7-d8 Ng4xe3 Bd8-b6 Kc4-d3 Kh1-g1 Kd3-e2 Bb6-c7 Ne3-c2 Bc7-e5 Ke2-e3 Be5-f6 Nc2xd4 Kg1-h1 Ke3-d3 Bf6-d8 Nd4-c2 Bd8-e7 Kd3-e4 g3-g4 f5xg4 Kh1-g1 Nc2-d4 Kg1-h1 Ke4-e3 Be7-b4 Nd4-f5 Bb4-d2+ Ke3-e4 Bd2-a5 Nf5-d4 Kh1-g1 Nd4-f3+ Kg1-f2 Nf3xh2 Kf2-g3 Nh2-f3 Kg3-f2 d5-d4 Ba5-b6 Ke4-f5) -6.60/39 101} Kf7 {(Kg6-f7 Be7-d6 Ng4xe3 Bd6-b4 Ne3-g4 Bb4-d2 Kf7-e8 Bd2-c1 Ke8-d7 Bc1-b2 Kd7-c6 Bb2-c1 Kc6-b5 Bc1-a3 Kb5-c4 Ba3-c5 Kc4-d3 Kg1-h1 Kd3-e3 Kh1-g1 Ke3-f3 Bc5-d6 Kf3-e4 Bd6-c5 Ke4-e3 Bc5-a7 Ke3-f3 Ba7-b8 Ng4-e3 Bb8-e5 Ne3-c2 Be5-g7 Kf3-e3 Bg7-e5 Nc2xd4 Kg1-f1 Nd4-f3 Be5-f6 Ke3-e4) +5.80/38 13} 4. Bd6 {(Be7-d6) -5.58/32 21} Nxe3 {(Ng4xe3 Kg1-f2 Ne3-g4+ Kf2-g1 Kf7-e8 Bd6-c5 Ke8-d7 Bc5-a7 Kd7-c6 Ba7-c5 Kc6-b5 Bc5-d6 Kb5-c4 Bd6-c5 Kc4-d3 Bc5-a7 Ng4-e3 Kg1-f2 Ne3-c2 Ba7-c5 Kd3-e4 g3-g4 f5xg4 Kf2-g3 Nc2-e3 Kg3-f2 Ke4xf4 Bc5-d6+ Kf4-e4 Bd6-e5 Ne3-f5 Be5-f6 Nf5xd4 Kf2-g3 Nd4-e2+ Kg3xg4 d5-d4 Bf6-g5 d4-d3 Bg5-h6 e6-e5 Bh6-d2 Ke4-d4 Kg4-f3 e5-e4+ Kf3-f2 Ne2-c3 Bd2-e3+) +5.65/42 12} 5. Ba3 {(Bd6-a3 Kf7-e8 Ba3-c5 Ne3-g4 Bc5-a3 Ke8-d7 Ba3-f8 Kd7-c6 Bf8-g7 Kc6-b7 Bg7-f8 Kb7-b6 Bf8-d6 Kb6-a6 Bd6-f8 Ka6-b5 Bf8-g7 Kb5-b6 Kg1-h1 Ng4-e3 Bg7-f8 Kb6-b5 g3-g4 Ne3xg4 Bf8-e7 Kb5-c4 Be7-c5 Kc4-d3 Kh1-g1 Kd3-e3 Bc5-b6 Ke3-e2 Bb6-d8 Ke2-d3 Kg1-f1 Kd3xd4 Kf1-e2 Ng4xh2 Ke2-f2 Nh2-g4+ Kf2-g3 h3-h2 Kg3-g2 Kd4-e3 Bd8-b6+ Ke3-d3 Bb6-c7 d5-d4 Bc7-a5 Kd3-e2 Ba5-b6 d4-d3) -6.12/32 16} Ng4 {(Ne3-g4 Kg1-h1 Kf7-e8 Ba3-c5 Ke8-d7 Bc5-a7 Kd7-c6 Kh1-g1 Kc6-b5 Ba7-c5 Kb5-c4 Bc5-a7 Kc4-d3 Kg1-h1 Ng4-e3 Ba7-b6 Ne3-c2 Kh1-g1 Kd3-e3 Kg1-h1 Nc2xd4 Kh1-g1 Ke3-e4 Kg1-f2 Nd4-f3 g3-g4 f5xg4 Kf2-g3 Ke4-f5 Bb6-e3 d5-d4 Be3-f2 d4-d3 Bf2-a7) +7.30/42 23} 6. Bc5 {(Ba3-c5) -6.98/37 23} Ke8 {(Kf7-e8 Bc5-b4 Ke8-d7 Bb4-c3 Kd7-c6 Bc3-b4 Kc6-b5 Bb4-d6 Kb5-c4 Bd6-c5 Kc4-d3 Bc5-a7 Kd3-e2 Ba7-c5 Ng4-e3 Bc5-a3 Ne3-c2 Ba3-b2 Ke2-e3 Kg1-f1 Nc2xd4 g3-g4 f5xg4 Bb2-c1+ Ke3-e4 Kf1-f2 Nd4-f3 Kf2-g3 Ke4-f5 Bc1-b2 d5-d4 Kg3-f2) +8.55/31 11} 7. Kh1 {(Kg1-h1) -6.59/40 19} Kd7 {(Ke8-d7 Kh1-g1 Kd7-c6 Kg1-h1 Kc6-b5 Bc5-a3 Kb5-c4 Ba3-c5 Kc4-d3 Kh1-g1 Kd3-e2 Bc5-e7 Ng4-e3 g3-g4 f5xg4 Be7-h4 Ne3-c2 Bh4-f6 Nc2-e1 Kg1-h1 Ne1-f3 Bf6-g7 Ke2-e3 Bg7-f8 Nf3xd4 Bf8-c5 Ke3-e4 Kh1-g1 Nd4-f3+ Kg1-f2 Nf3xh2 Bc5-d6 Nh2-f3 Kf2-g3 Ke4-f5) +10.10/34 10} 8. Kg1 {(Kh1-g1) -7.18/41 9} Kc6 {(Kd7-c6 Bc5-a3 Kc6-b5 Ba3-c5 Kb5-c4 Bc5-a7 Kc4-d3 Ba7-c5 Kd3-e2 Bc5-f8 Ng4-e3 Bf8-g7 Ne3-c2 Kg1-h1 Ke2-d3 Kh1-g1 Kd3-e3 g3-g4 f5xg4 Bg7-h6 Ke3-e2 Bh6-g7 Nc2-e1 Kg1-h1 Ne1-f3 f4-f5 e6xf5 Bg7-f6 Ke2-d3 Bf6-h8 Nf3xd4 Bh8-f6 Kd3-e4 Bf6-e7 Nd4-f3 Be7-c5) +11.09/34 8} 9. Bf8 {(Bc5-f8 Kc6-b5) -7.38/38 24} Kb5 {(Kc6-b5 Bf8-a3 Kb5-c4 Ba3-c5 Kc4-d3 Kg1-h1 Kd3-d2 Kh1-g1 Kd2-e2 Bc5-a3 Ng4-e3 Ba3-b2 Ne3-c2 g3-g4 f5xg4 Bb2-c3 Nc2-e3 f4-f5 e6xf5 Bc3-a5 Ne3-c2 Ba5-b6 Ke2-e3 Bb6-c7 Nc2xd4 Bc7-b6 Ke3-e4 Kg1-f2) +12.93/32 12} 10. Ba3 {(Bf8-a3 Kb5-c4) -7.25/31 7} Kc4 {(Kb5-c4 Ba3-c5 Kc4-d3 Bc5-b6 Kd3-e2 Bb6-c7 Ng4-e3 Bc7-e5 Ne3-c2 Kg1-h1 Ke2-f1 Be5-f6 Nc2-e3 g3-g4 f5xg4 Bf6-d8 Kf1-e2 Bd8-e7 Ne3-c2 Be7-f6 Ke2-e3 Bf6-g5 Ke3-f2 Bg5-h4+ Kf2-f1 Bh4-f6 Kf1-e2 Bf6-g7 Ke2-e3 Bg7-h6 Ke3-d3 Kh1-g1 Kd3-e2 Bh6-g7 Nc2-e1 Kg1-h1 Ne1-f3 Bg7-f6 Ke2-e3 Bf6-g7 Nf3xd4 Bg7-h6 Ke3-e4 Kh1-g1 Nd4-f3+ Kg1-f2 Nf3xh2 Kf2-g3 Nh2-f3 Bh6-f8 Ke4-f5 Bf8-h6) +13.97/38 12} 11. Bc5 {(Ba3-c5 Kc4-d3) -7.43/31 6} Kd3 {(Kc4-d3 Bc5-b6 Kd3-e2 Bb6-d8 Ng4-e3 Bd8-f6 Ne3-c2 Kg1-h1 Ke2-f1 Bf6-e7 Nc2-e3 g3-g4 f5xg4 Be7-f6 Ne3-c2 Bf6-g7 Kf1-f2 Bg7-f6 Kf2-e2 Bf6-g7 Ke2-e3 Bg7-f8 Nc2xd4 Bf8-c5 Ke3-e4 Kh1-g1 Nd4-f3+ Kg1-f2 Nf3xh2 Bc5-f8 Nh2-f3 Bf8-h6 d5-d4 Kf2-g3 Ke4-f5 Kg3-f2 d4-d3 Kf2-e3 d3-d2 Ke3-e2 h3-h2) +14.71/36 9} 12. Kh1 {(Kg1-h1 Kd3-e2) -7.44/31 16} Ne3 {(Ng4-e3 Kh1-g1 Kd3-e2 Bc5-b6 Ne3-c2 Bb6-a7 Ke2-e3 Kg1-h1 Nc2xd4 Ba7-b6 Ke3-d3 Kh1-g1 Kd3-e4 Kg1-f2 Nd4-f3 g3-g4 f5xg4 Kf2-g3 Ke4-f5 Bb6-a5 d5-d4 Ba5-d8 d4-d3 Kg3-f2 Kf5xf4 Bd8-b6 Nf3xh2 Bb6-e3+ Kf4-f5 Be3-h6 e6-e5 Kf2-e3 Nh2-f1+ Ke3xd3 h3-h2 Bh6-g7 h2-h1Q Kd3-c2) +17.63/34 17} 13. Bb6 {(Bc5-b6 Kd3-e2 Bb6-d8 Ne3-g2 Bd8-g5 Ng2-e1 Bg5-h4 Ne1-f3 Bh4-f6 Ke2-f1 g3-g4 f5xg4 Bf6-d8 Nf3-e1 Bd8-f6 Kf1-e2 Bf6-e5 Ke2-e3 Be5-d6 Ke3-d3 Bd6-c5 Kd3-e2 Bc5-b4 Ne1-f3 Bb4-c3 Ke2-d3 Bc3-b2 Nf3xd4 Kh1-g1 Kd3-e3 Kg1-f1 Nd4-f3 Bb2-c1+ Ke3-e4 Kf1-f2 Nf3xh2 f4-f5 e6xf5 Kf2-g3 Nh2-f1+ Kg3-f2 Nf1-e3 Bc1xe3 g4-g3+ Kf2xg3 Ke4xe3 Kg3xh3 f5-f4 Kh3-h4 d5-d4 Kh4-g5 d4-d3 Kg5-g4 d3-d2 Kg4-h5) -8.39/32 12} Nc2 {(Ne3-c2 Kh1-g1 Kd3-e3 Kg1-f1 Nc2xd4 Bb6-c5 Ke3-e4 Kf1-f2 Nd4-f3 g3-g4 f5xg4 Bc5-d6 Ke4-f5 Bd6-b4 d5-d4 Kf2-g3 d4-d3 Kg3-f2 Nf3xh2 Kf2-e3 Nh2-f3 Ke3xd3 h3-h2 Kd3-c4 h2-h1Q Kc4-b5 Kf5xf4 Kb5-c6 e6-e5 Bb4-f8 g4-g3 Bf8-c5 Qh1-e1 Kc6-d7 Qe1-e4 Kd7-c7) +23.44/30 13} 14. Kg1 {(Kh1-g1 Nc2xd4) -6.41/27 6} Ke3 {(Kd3-e3 Kg1-f1 Nc2xd4 Kf1-g1 Ke3-e4 Kg1-f2 Nd4-f3 g3-g4 f5xg4 Kf2-g3 Ke4-f5 Bb6-d8 d5-d4 Bd8-c7 d4-d3 Kg3-f2 Nf3xh2 Kf2-e3 Nh2-f3 Ke3xd3 h3-h2 Kd3-c4 h2-h1Q Kc4-b5 g4-g3 Bc7-b6 Qh1-d1 Kb5-a6 Qd1-d5 Ka6-a7 Kf5xf4 Ka7-b8 g3-g2 Kb8-c7 e6-e5) +24.80/32 9} 15. Kh1 {(Kg1-h1 Ke3-e2 Bb6-c5 Nc2-e1 Kh1-g1 Ne1-f3+ Kg1-h1 Ke2-f1 Bc5-b4 Nf3-e1 Bb4-d2 Kf1-f2 Bd2xe1+ Kf2xe1 Kh1-g1 Ke1-e2 Kg1-h1 Ke2-e3 Kh1-g1 Ke3xd4 Kg1-f2 Kd4-e4 Kf2-e2 d5-d4 Ke2-f2 d4-d3 Kf2-e1 Ke4-e3 Ke1-d1 d3-d2 Kd1-c2 Ke3-e2 Kc2-b3 d2-d1Q+ Kb3-c4 Ke2-f3 Kc4-c5 Qd1-d2 g3-g4 f5xg4 f4-f5 e6xf5 Kc5-c6 Qd2xh2 Kc6-d7) -8.67/31 10} Nxd4 {(Nc2xd4 Kh1-g1 Ke3-e4 Kg1-f2 Nd4-f3 g3-g4 f5xg4 Kf2-g3 Ke4-f5 Bb6-a7 d5-d4 Ba7-b6 d4-d3 Kg3-f2 Nf3xh2 Kf2-e3 Nh2-f3 Ke3xd3 h3-h2 Kd3-c3 h2-h1Q Bb6-e3 Qh1-e1+ Kc3-d3 Qe1-b1+ Kd3-c3 Qb1-e4 Be3-c1 g4-g3 Bc1-a3 Qe4xf4 Kc3-c2 Qf4-c4+ Kc2-b2 Qc4-d4+) +26.51/32 9} 16. g4 {(g3-g4 f5xg4) -8.92/29 15} fxg4 {(f5xg4 Kh1-g1 Ke3-e4 Kg1-f2 Nd4-f3 Kf2-g3 Ke4-f5 Bb6-d8 d5-d4 Bd8-e7 d4-d3 Kg3-f2 Nf3xh2 Kf2-e3 Nh2-f3 Ke3xd3 h3-h2 Kd3-c4 h2-h1Q Kc4-c5 Kf5xf4 Be7-f6 Qh1-d1 Kc5-b6 Nf3-e5 Kb6-a7 Qd1-d7+ Ka7-b6 Qd7-d5 Kb6-a7 g4-g3 Ka7-a6 Ne5-f3 Bf6-g7 g3-g2 Bg7-h8 Qd5-a8+ Ka6-b5) +30.78/32 16} 17. Kg1 {(Kh1-g1 Ke3-e4) -9.52/29 7} 0-1[/pgn]