Apr-21-21
 | | Phony Benoni: Not uch to it. 42.Rxe4 wins a piece, since 42...dxe4 43.Qd8+ Kh7 44.Qh4+ Lg8 45.Ne7+ loses the queen. |
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| Apr-21-21 | | BxChess: I thought 43...Kh7 44. Ne7 leads to mate |
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| Apr-21-21 | | agb2002: White is one pawn up.
Black threatens Rxf2+.
The position of Black's royal family and the defenseless pawn on h4 invites to play 42.Rxe4 dxe4 43.Qd8+ Kh7 44.Qxh4+ (44.Ne7 Rxf2+ makes matters unnecessarily complex) 44... Kg8 45.Ne7+ wins decisive material. |
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| Apr-21-21 | | Walter Glattke: Black threatens Rxf2+, white is a pawn ahead and plays 42.Rxe4 dxe4 resign, so 43.Qd8+ Kh7 44. Qxh4+ loses the Queen by 44.Qh6 45.Nxh6 (or Kg8 Ne7+ and Nxg6) Q+2P for R and attack, 45.-gxh6 46.g5 e3 47.Qxh6+ Kg8 48.Qf6 Rxf2+ 49.Qxf2!? exf2 50.Kxf2 Kf8 51.c5 Ke7 52.h4 |
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| Apr-21-21 | | Brenin: 42 Rxe4, winning a piece since 42 ... dxe4 loses the Q, is not hard to see. Black's 40 ... Ra2 (opening up the back rank for White's Q) and 41 ...Ne4 (opening up the e8-h4 diagonal for the Q) both look like desperation: Black's disjointed Q-side and central pawn-structure has kept him on the back foot ever since the opening. |
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| Apr-21-21 | | AlicesKnight: Well spotted in a 'rapid'. 42.Rxe4 dxe4; 43.Qd8+ Kh7; 44.Qxh4+ and either possible reply wins the Black Q. Neat clearance sacrifice. |
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Apr-21-21
 | | piltdown man: Not easy to see for us non grandmasters. |
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Apr-21-21
 | | perfidious: <piltdown man: Not easy to see for us non grandmasters.> I am no GM, and this forcing process was not at all difficult to spot. |
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| Apr-21-21 | | Oxspawn: <perfidious:I am no GM, and this forcing process was not at all difficult to spot.>
The thing I have spotted is: Things that you spot are easy to spot and the other things are not easy and remain unseen. Questions you know the answer to are easy questions. All the rest are hard questions. Mind you, I saw this and I am not even a GP (grand patzer). So it was hard when I first looked at it, and became easier after I saw it. According to Rupert Sheldrake's theory of morphic resonance, the more people who 'see' it, the easier it should become for everyone else. Best wishes to all for an easy day. |
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| Apr-21-21 | | awfulhangover: <piltdown man: Not easy to see for us non grandmasters>
I am an average patzer, but it took me 5 seconds to solve! |
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| Apr-21-21 | | malt: White wins a piece, with 42.R:e4 Qg5
(42...de4 43.Qd8+ Kh7 44.Q:h4+ Kg8 45.Ne7+ )
43.cd5 Rd2 44.Qc4 |
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| Apr-21-21 | | Damenlaeuferbauer: After long thinking, the very strong Russian GM Andrei Kharlov, who tied for the first to fourth place in the Russian championship 1990, was Garry Kasparov's second (together with the Russian GM Mikhail Kobalia) in his match against Vladimir Kramnik 2000 in London and won the A group of the Aeroflot Open 2005 in Moscow, finally found the nice exchange sacrifice 42.Rxe4!,fxe4 43.Qd8+,Kh7 44.Qxh4+,Kg8 (44.-,Qh6 45.Nxh6 +-) 45.Ne7+,Kf8 46.Nxg6+ +-. Unfortunately he died in 2014 just 45 years old. May your soul rest in eternal peace, GM Andrei Kharlov! |
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| Apr-21-21 | | TheaN: <42.Rxe4 +-> given 42....dxe4 43.Qd8+ per text, following 43....Kh7 44.Qxh4+ Kg8 45.Ne7+ +-. <BxChess: I thought 43...Kh7 44. Ne7 leads to mate> Interesting switcheroo, but no. If the queen moves, ie 44....Qf6 45.Qg8+ Kh6 46.Qh8+ Kg5 47.Qh5+ Kf4 48.Nd5#. Crucial here's the White curtain from the king and f2-pawn. Hence, White is much better but not mating after 44....Rxf2+ (pretty much the only move) 45.Kxf2 (now for example Kh1?? Qf6 -+ and Black turns the tables) Qf6+ 46.Ke1 Qc3+ and White can only prevent perpetual with Qd2 with an endgame to follow. Tl;dr winning yes, mating no. |
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| Apr-21-21 | | mel gibson: I wasn't sure as there seemed to be many good moves. When I gave Stockfish 13 a quick run
of 160 seconds it chose another move:
42. Qxd5
(42. Qxd5 (♕d4xd5
♘e4-f6 ♕d5-d4 b7-b6 ♖e3-e7 ♕g6-g5 ♖e7xf7 ♖a2-d2 ♖f7xg7 ♖d2xd4 ♖g7xg5 ♖d4-d2
♔g2-f3 ♖d2-d3+ ♔f3-f4 ♖d3xh3 ♖g5-g6 ♘f6-d7 ♖g6-d6 ♘d7-f8 ♖d6xb6 ♔h8-g8
f2-f3 ♖h3-h2 ♖b6-h6 ♖h2-b2 ♘f5xh4 ♖b2xb3 ♘h4-f5 ♖b3-b4 ♖h6-c6 ♔g8-f7 ♔f4-e5
♘f8-g6+ ♖c6xg6 ♔f7xg6 ♘f5-d6 ♖b4-b3 f3-f4 ♖b3-e3+ ♔e5-d5 ♖e3-d3+ ♔d5-c6
♖d3-g3 f4-f5+ ♔g6-f6 c4-c5 ♖g3xg4) +9.33/33 160) score for White +9.33 depth 33
But when I forced Stockfish 13 to play the text move 42.Rxe4 42. Rxe4 dxe4
(42. .. dxe4
(d5xe4 ♕d4-d8+ ♔h8-h7 ♕d8xh4+ ♕g6-h6 ♘f5xh6 g7xh6 ♕h4-e7 e4-e3 ♕e7xf7+
♔h7-h8 ♕f7-e8+ ♔h8-h7 ♕e8xe3 ♖a2-a8 ♕e3-e4+ ♔h7-h8 ♕e4xb7 ♖a8-g8 ♕b7-d5
♖g8-f8 b5-b6 ♔h8-g7 b6-b7 ♔g7-f6 ♕d5-f5+ ♔f6-g7 ♕f5xf8+ ♔g7xf8 b7-b8♕+
♔f8-f7 ♕b8-e5 ♔f7-f8 ♕e5-e6 ♔f8-g7 ♕e6-e7+ ♔g7-h8 c4-c5 ♔h8-g8 c5-c6 h6-h5
c6-c7 h5xg4 c7-c8♕+) -M22/60 2761)
White wins mate in 22. |
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| Apr-21-21 | | belgradegambit: That was Monday easy. |
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| Apr-21-21 | | saturn2: 42. Rxe4 dxe4 43. Qd8+ Kh7 44. Qxh4+ and either 44...Qg8 or Qh6 lose the queen |
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| Apr-21-21 | | thegoodanarchist: <piltdown man: Not easy to see for us non grandmasters.> I'm not even a master, yet I solved this easily using general principles: The Black knight was too strong and had to go, otherwise Black wins a pawn with a rook check, and maybe it is game over for White. Then I saw the follow-up queen check also gives her access to a 2nd check on the h-file, so I was almost done. After Black puts his king on g8, we see the standard knight fork is available, winning the queen. |
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| Apr-21-21 | | opus: Black will lose because Queen is trapped but does have counterplay 42...Ra8 43. Qxd5 Qg5 44. Qe5 f6 45. f4 Qh6 46. Nxh6 fxe5 47. Nf7+ Kg8 48. Ng5 Kf8 49. Rxe5 Re8 50. Ne6+ Kg8 51. f5 Kh8 52. f6 gxf6 53. Rh5+ Kg8 54. Nc7 Re2+ 55. Kf3 Re5 56. Rxe5 fxe5 57. Ke4 Kf7 58. Kxe5 Ke7 59. Nd5+ Kd7 60. Nf6+ Ke7 61. Ng8+ Kf7 62. Nh6+ Kg7 63. g5 Kf8 64. g6 Kg7 65. Kf5 Kxh6 66. Kf6 Kh5 67. g7 Kh6 68. g8=Q Kh5 69. Qg5# No time for endgame in blunder chess |
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Apr-21-21
 | | chrisowen: Fast and mad no? |
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| Apr-21-21 | | Hercdon: <ChrisOwen> Yes |
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| Apr-21-21 | | macer75: Nice win by Karpov. |
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| Apr-21-21 | | 1g1yy: < mel gibson: ...
When I gave Stockfish 13 a quick run
of 160 seconds it chose another move:
42. Qxd5 >
Yea, I looked at that, but not for very long. I really didn't like the idea of black having an immediate check and taking the initiative, even if it did appear short lived. RxN and never letting black off the ropes if they capture back, was far more appealing to me. |
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| Apr-21-21 | | QueenMe: It was obvious, even without any specific continuation, that in this case, too much was depending on the black knight, and it was, in this position, actually worth more than the white's rook anyway (meaning, even before any specific "sacrifice" was contemplated). So you just take it. This immediately cancels any threat from Black's rook (& makes it essentially useless), plus gives you the protecting pawn (if you want it). That's already very reasonable compensation for White's rook. And THEN there's the matter of studying what it leads to: once the rook is captured, The D file opens, so White then has a follow-on check; and - surprise! - it leads immediately to another check at h4. So by now you've definitely gotten adequete compensation for the rook, and that's even before noticing the windfall: black can only interpose the queen at h5 (just a donation), or at h6 (knight takes it); or he can move the king to g8, which sets up the royal fork with ne7. Either way, white's queen is gone, and he even ends up with doubled g-file pawns after re-capture. White will be able to pick off a couple of pawns even before Black has a chance to threaten one of white's. So white will easily be able to pick up multiple queens and turn this into an embarrassing rout. |
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Kibitzing
sac: 42.Rxe4