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| Sep-27-18 | | saturn2: I considered 18...Rxh2 19. Nxe4 Rdh8 20. f3 Nxe4 21. fxe4 Rxg2+ 22. Kxg2 Qh2+ It might go on like
23. Kf3 Rh3+ 24. Kg4 Qg2+ 25. Kf4 g5+ 26. Kf5 g6# |
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| Sep-27-18 | | agb2002: Black has a knight for a bishop.
White threatens Qxa7 and Bxf7 (Nxe4 Qxh2#).
The possibility of attacking the white king with four pieces suggests 18... Rxh2: A) 19.Kxh2 Ng4+ wins decisive material.
B) 19.Qxa7 Rdh8 (threatens 19... Rh1+ 20.Nxh1 Qh2#) B.1) 20.Rfd1 Ng4 (threatens 20... Rh1+ 20.Nxh1 Rxh1+ 21.Kxh1 Qh2#) B.1.a) 21.Qa8+ Nb8 22.Kf1 Ne3+ 23.fxe3 (else loses an exchange at least) 23... Qxg3 looks winning (24.Rd2 Rh1+ 25.Ke2 Qxg2#). B.1.b) 21.Kf1 Nb6 22.Qa5 (due to Qc5; 22.Ke2 Rxg2 23.Rf1 Qc5 seems to win) 22... Ne3+ as above. B.2) 20.Rfe1 Ng4 21.Kf1 e3 looks very good for Black (22.fxe3 Qxg3 wins; 22.Ne2 Rh1+ 23.Ng1 Rxg1+ 24.Kxg1 Rh1+ 25.Kxh1 Qh2#). B.3) 20.Qa8+ Nb8 looks similar to previous lines. C) 19.Bxf7 Rdh8 20.Rfd1 Ng4 21.Qxa7 Rh1+ and mate in two. |
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| Sep-27-18 | | patzer2: The first move of today's Thursday puzzle (18...Rxh2!) was easy for me due to the royal, Knight fork threat 18...Rxh2! 19. Kxh2? Ng4+ -+ (-8.32 @ 31 ply, Stockfish 9). If 18...Rxh2! 19. Kxh2? Ng4+ -+ (-8.32 @ 31 ply, Stockfish 9), play might continue 20. Kg1 (20. Kh3? Rh8+! 21. Kxg4 Nf6+ 22. Kg5 Qe5+ 23. Nf5 Qx5#) 20...Nxe3 (diagram below) 
click for larger view21. fxe3 (21. Re1 Nf5 -+, -8.60 @ 27 ply) 21...Qxg3 -+ (-62.00 @ 25 ply, Stockfish 9). In the actual game, after 18...Rxh2!, White put up the strongest possible defense with 19. Rfd1 allowing 19...Rdh8! -+ (-2.90 @ 39 ply, Stockfish 9). While 19...Rdh8! may be the strongest move available, it is not the only winning continuation. The simple reply 19...Kb8 20. Nf1 Rh4 -+ (-2.65 @ 39 ply, Stockfish 9), with the idea of holding an extra Black pawn going into the endgame, also wins. P.S.: So where did White go wrong?
At evaluations below 30 ply, the computer indicates the losing move was 17. Qe2? allowing 17...Bxe3! -+ (-2.72 @ 30 ply, Stockfish 9). However, after deeper analysis of the best play line 17. Qf4 Bd6 18. Qg5 Ne5 19. Rad1 Nh7! 20. Qh4 f5 21. Bf4 Nd3 -+ (-1.78 @ 34 ply, Stockfish 9) it appears White is still on the brink of losing. So for a last best chance improvement for White, 14. Qe2 Ne5 15. Nxg6 = (+0.18 @ 34 ply, Stockfish 9) is surely better than the game continuation 14. Nxg6?! hxg6 ⩱ (-0.56 @ 34 ply, Stockfish 9). |
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| Sep-27-18 | | Karne: Glorious game from Hikaru. |
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| Sep-27-18 | | patzer2: The move I enjoyed most was 20...e3!, threatening the game continuation 20. Qxe3? Ng4 -+ when White must surrender the Queen to avoid a quick mate (e.g. 21. Qe4? Rh1+ 22. Nxh1 Rxh1+ 23. Kxh1 Qh2#). After 20...e3!, the computer indicates White's best is 21. Qa8+ Nb8 22. Rd4 R2h4! 23. Rad1 (23.Rxh4 exf2+! 24. Kxf2 Rxh4 -+) 23...e2! 24. Rxh4 exd1(Q)+ 25. Bxd1 Rxh4 ( -+ (-5.26 @ 31 ply, Stockfish 9) with a clear win for Black. |
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| Sep-27-18 | | Madman99X: Ironically, Houdini 6 gives Qe8+ as white's best move in the ending position. You know you're in trouble when the engine suggests a spite check. |
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| Sep-27-18 | | Strelets: <Madman99X> Words to live by. |
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| Sep-27-18 | | NBZ: <al wazir: Why didn't black play 20...Ng4, one move earlier with the same threat?> I thought it was because White can play 21. Kf1. Black can still win by 21. ... e3 but the game continuation is cleaner in my opinion. |
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| Oct-04-18 | | nalinw: Still in repeating mode |
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| Oct-04-18 | | agb2002: Begin Again (Redemption):
https://m.youtube.com/watch?v=TFgkO... |
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| Oct-04-18 | | Walter Glattke: CG, the colleagues of that Begin Again band, wants to know D) 19.Nxe4, e.g. 19.-Ng4 20.Qg3. Looks nice, but Maybe not correct. |
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| Oct-04-18 | | gofer: <Booo! Shame! Shame!> |
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| Oct-04-18 | | Walter Glattke: D) Black wins a piece with 19.Nxe4 Rh1+ 20.Kxh1 Rh8+ 21.Qh3 (21.Kg1 Qh2#) 21.-Rxh3+ 22.gxh3 Nxe4 |
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| Oct-04-18 | | saturn2: <Walter Glattke Black wins a piece with 19.Nxe4 Rh1+ > Yes. Otherwise after
18...Rxh2 19. Nxe4 Nxe4 20. Qxe4 is not possible because of 20.. Rh1+ 21. Kxh1 Rh8+ 22. Qh4 Rxh4+ etc. I missed this when I posted the answer 19.Nxe4 last week. |
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| Oct-04-18 | | sethoflagos: It's been a while since I looked at one of these, so it felt good to spot that 18...Rxh2 19.Kxh2 Ng4+ =carnage fairly quickly. 19...Rdh8 looked a fast enough attack to have the king struggling for an escape route after any other continuation. Fast enough not to worry about dropping the odd pawn here or there anyway. |
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| Aug-19-22 | | GlennOliver: 22. ... Qg3 followed by
23. ... Ng4
looks appealing for Black, but ends in at best a draw. |
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| Mar-19-25 | | mel gibson: The first ply was obvious due to the Knight royal fork. Stockfish 17 says:
18. .. Rxh2
(18. .. Rxh2 (1. ... Rxh2 2.Rfe1 Rdh8 3.Kf1 Nc5 4.Bxf7 Kb8 5.Rad1 Nd3 6.Be6 Nh5 7.Nxh5
Rh1+ 8.Ke2 Rxe1+ 9.Rxe1 gxh5 10.Rd1 Nf4+ 11.Kf1 Nxe6 12.Qxe4 Qf7 13.Qe5+
Nc7 14.Kg1 Rf8 ) +3.86/44 305)
score for Black +3.86 depth 44. |
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| Mar-19-25 | | whiteshark: a finely spun # net |
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| Mar-19-25 | | mel gibson: My Norton says the security certificate has expired on this site in the last day.
I had to over ride it to get in. |
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| Mar-19-25 | | whiteshark: <mel> me2! |
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| Mar-19-25 | | TheaN: Good Wednesday puzzle (bit on the easy side maybe), given that after <18....Rxh2> it's obvious 19.Kxh2?! Ng4+ -+ doesn't work. What makes this a Wednesday puzzle though, is realizing the hidden mating net after Black doubles on the h-file. I'll demonstrate this with the line where White ignores it initially: <19.Bxf7>, again, White's best moves are any move with Rf1 to create air, but in that case -+ as Black won a pawn and is still attacking. <19....Rdh8 20.Rfd1> at this point White realizes the danger, but it's too late. If 20.Bxg6? Rh1+ 21.Nxh1 Qh2# is fairly obvious, but in the line after <20....Ng4 21.Qxa7?>:
click for larger view
<21....Rh1+! 22.Nxh1 Rxh1+! 23.Kxh1 Qh2#>. This shows White has no time to play pawn grabbing moves as once the second rook appears on the h-file, the double sac is in the air. Alas, Black wins h2 and huge initiative after Rxh2. |
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Mar-19-25
 | | chrisowen: See birth too xxx |
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| Mar-19-25 | | mel gibson: <whiteshark: <mel> me2!> It's fixed now - good. |
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| Mar-19-25 | | Lambda: I'm not quite sure how much you should be calculating here. If I had this position in a game, my thoughts would be "I can play Rxh2 thanks to the fork threat on g4. That must be a good move, at worst, white can take a pawn too, but then I play Rh8 and have a mate threat and a big attack and I haven't lost any material, let's play it, see what my opponent does." |
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| Mar-19-25 | | King.Arthur.Brazil: Seems very unpleasant for W: 18...Rxh2 the following R8h8 and Ng4 or Qg3 depending on W moves, must end the story. Obviously, 19. Kxh2 Ng4+ and captures our enemy's beloved {Q). |
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