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< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Aug-31-17 | | Altairvega: I say 26.Re3 to avoid loss of the B and to limit the number of checks that black can give. Anyway if 26 ..Qh1+ 27 Ke2 if 26. ..Qg2+ 27 Ke1. If 27..Qh1+ 28 Ke2. Black has no more checks and will try to get off the pin of the black rook. Then I look the solution for the rest It comes as a surprise to me that white eventuall wins. I thought it a draw |
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| Aug-31-17 | | Walter Glattke: 26.Re3 Qh1+ 27.Ke2 Qxh3 28.Bc4 Kf7!?
29.Qxb2+ Kf8 or 29.Kd2 Qh6 30.Qxb7+ Kf8
31.Qxa7!? Rxe3! Little white advantage then. |
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| Aug-31-17 | | diagonalley: i thought white could get away with 26.RxR ... presumably there is a refutation though(?) |
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Aug-31-17
 | | scormus: Rxe6? Hmmm ...... with 2 # threats, it's easy to overlook .... Qxd3. I mean Qxd3+ .... or is that Qxd3+;) |
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| Aug-31-17 | | Walter Glattke: c: I oversaw Pf5, combination not possible |
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| Aug-31-17 | | AlicesKnight: Found the key of 26.Re3. White must prevent mate and save the B, and coverage of the e-file escape is necessary before the pin can be exploited. |
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| Aug-31-17 | | jffun1958: 33. ... Kg5(h5) it's 4-mate:
34. Qxf5+ Kh6 35. Qh7+ Kg5 36. Qxg7+ Kf4 (36. ... Kh4(h5) 37. Rh8#) 37. Rf8# |
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| Aug-31-17 | | patzer2: I thought ((26. ?) was fairly easy for a Thursday puzzle. The only problem was ruling out 26. Rxe6? which gives Black a strong advantage after 26. Rxe6? Qxd3+ 27. Re2+ [] Kf8! 28. Qb4+ (28. Qa3+ Qd6 ∓; not 28. Qxb7?? Qxh3+ 29. Ke1 Qh1+ 30. Kd2 Rd6+ 31. Ke3 Qe4#) 28...Rd6! ∓ (-1.25 @ 35 depth, Stockfish 8.) So that left the in-between move <26. Re3!,> saving the Bishop while still leaving the pinned Black Rook under attack, to consider. What I had calculated was 26. Re3! Qg2+ 27. Ke2 Kf7 (27...Qd5 28. Bc4 +-) 28. Bc4 +-. However, after the game moves <26. Re3! Qg2+ 27. Ke1 +->, I thought I might have made a mistake. Upon checking with the computer it turns out 27. Ke2 is Just as strong and perhaps even stronger than 27. Ke1, as Stockfish 8 @ 34 depth gives 27. Ke2 a slightly higher assessment: [Stockfish 8 64] 34:+5.92 <27.Ke2> Kf8 28.Rxe6 Rxe6+ 29.Qxe6 Qg6 30.Qc8+ Qe8+ 31.Qxe8+ Kxe8 32.Bxf5 h6 33.Kf3 Ke7 34.Kg4 b6 35.Be4 Ke6 36.Bxc6 Ke5 37.Bb7 Kf6 38.Ba6 Ke6 39.Bc4+ Kf6 40.Bb5 Ke5 41.Bd3 Kf6 42.Be4 Ke6 43.Kh5 Kf6 44.Bd3 Kf7 45.Bc4+ Kf6 46.Bb5 Kf5 47.Bc6 Ke6 48.Kg6 Kd6 49.Bb5 Kd5 50.Kh5 a5 [Stockfish 8 64] 34:+5.11 <27.Ke1> Kf8 28.Rxe6 Rxe6+ 29.Qxe6 Qg6 30.Qc8+ Qe8+ 31.Qxe8+ Kxe8 32.Bxf5 g6 33.Bd3 Ke7 34.Ke2 Kf6 35.Kf3 Kg5 36.Kg3 Kh5 37.h4 Kh6 38.Kg4 Kg7 39.Kg5 h6+ 40.Kf4 Kf6 41.Be4 a6 42.Bd3 a5 43.a4 b6 44.Bc4 c5 45.Bd3 Ke6 46.Bxg6 c4 47.Be4 Kf6 48.Bd5 P.S.: Black's decisive mistake was 25...Qxf3?, allowing 26. Re3! +-.
Instead, the computer finds the strong drawing resource 25...Qd2! =.
After the Stockfish 8 line 25...Qd2! 26.Rxe6 Qxd3+ 27.Re2+ Kf8 28.Qxb7 Qd1+ 29.Re1 Qd3+ 30.Re2 = (0.00 @ 34 depth,) it's a draw by repetition. |
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| Aug-31-17 | | malt: First looked at
26.R:e6 Q:d3+ 27.Re2+ Kf8/Kh8
But 26.Re3 Qg2+ (26...Qh1+ 27.Ke2)27.Ke1 |
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| Aug-31-17 | | bubuli55: Deviated from text
32.Qf8+ Kg6
33.Qf5+ Kh6
34.Qh7+ Kg5
35.Qf5+ Kh6 or Kh4
36.Rh8# |
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| Aug-31-17 | | saturn2: 26 Re3 was my choice. The rook on e6 remains pinned and the endangered white king gets the two squares e1 and e2 to hide. |
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| Aug-31-17 | | Marmot PFL: black is threatening Qh1# as well as Qxd3+. 26 Re3 meets both threats and Re6 is still pinned. |
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| Aug-31-17 | | goodevans: Did CG.com intend us to fall for the beguiling but mistaken <26.Rxe6 Qxd3+ 27.Re2>? Was that the point of the puzzle? I'm afraid it didn't work on me as I saw straight away the strength of <26.Re3> and stopped looking, wondering instead why we had such a simple puzzle on a Thursday. Maybe if I'd looked harder for a better move than 26.Re3 I might have fallen for it! |
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Aug-31-17
 | | Jimfromprovidence: There is an attempt at a rook trap in one reasonable variation, after 26 Re3 Qh1+ 27 Ke2 Kf7 28 Bc4 Kf6 29 Bxe6 f4, below.
click for larger view
White to play and win. |
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Aug-31-17
 | | samvega: An example of a "co-linear" move, a term coined by Nunn (if I remember correctly). The idea is that when a long range piece can make a capture further down the board, some players tend to evaluate the capture only, and overlook the intervening (or co-linear) non-capturing moves. |
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| Aug-31-17 | | ChessHigherCat: < samvega: An example of a "co-linear" move, a term coined by Nunn (if I remember correctly). The idea is that when a long range piece can make a capture further down the board, some players tend to evaluate the capture only, and overlook the intervening (or co-linear) non-capturing moves.> That's interesting, it sounds like it's straight out of cognitive psychology: we're instinctively programmed to reach and grab the banana and we're not used to stopping short of them :-) |
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| Aug-31-17 | | RandomVisitor: After 23.Qb3 black has Qg5!
click for larger viewStockfish_17081107_x64_modern: <1.5 minutes computer time, 8 cores> <-4.76/34 23...Qg5+ 24.Kh1 Rff6> 25.Re1 Rg6 26.Qxe6+ Rxe6 27.Rxe6 Qd2 28.Bc4 Kf8 29.Kg2 Qg5+ 30.Kf1 Qf4 31.b3 Qxf3 32.Re3 Qh1+ 33.Ke2 f4 34.Rf3 g5 35.b4 Qb1 36.Kd2 Qe4 37.Be2 Qd5+ 38.Ke1 Qxa2 39.Bd1 Qd5 40.Be2 Ke7 41.Rd3 Qh1+ 42.Kd2 Qg1 43.Rf3 Qb1 44.h4 Qa2+ 45.Ke1 gxh4 46.Rxf4 Qb1+ 47.Kd2 Qg6 48.Rf3 Qg2 |
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| Aug-31-17 | | morfishine: <26.Re3> solves everything |
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| Aug-31-17 | | RandomVisitor: After 21...Rd6 perhaps winning is 22.Re3
click for larger viewStockfish_17081107_x64_modern: <1.75 hours computer time, 8 cores> <+4.87/47 22.Re3 Qg5+ 23.Kh1> Kh8 24.f4 Qxf4 25.Qe2 Rd7 26.Re8 Rd8 27.Re1 Rdxe8 28.Qxe8 Rg8 29.Kg2 Qg5+ 30.Kf3 Qh6 31.Bxf5 g6 32.Qe5+ Qg7 33.Qxg7+ Kxg7 34.Bc2 Rf8+ 35.Kg3 Rf7 36.Bb3 Rd7 37.Rd1 Re7 38.Rd6 Kf8 39.Kf3 Kg7 40.Kg4 c5 41.Be6 b6 42.Kf4 Kf6 43.Bd5+ Kg7 44.Bb3 Kh6 45.Be6 Kh5 46.Ke5 Kh4 47.Rd1 Kg5 |
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| Aug-31-17 | | Cheapo by the Dozen: <Jimfromprovidence>, I'm not sure why the capture at e6 in your line was with the bishop, but anyway Bg4 is an appealing followup because of the mate threats. |
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Aug-31-17
| | Jimfromprovidence: <Cheapo by the Dozen> <I'm not sure why the capture at e6 in your line was with the bishop, but anyway Bg4 is an appealing followup because of the mate threats.> Because it's a credible (maybe best) move in that position. Anyway, your response 30 Bg4 is surely winning and in line with what I discovered, another bishop move,30 Bf7. 
click for larger viewIn any case, black cannot take the rook with his pawn in either scenario because of the mate threat beginning with 31 Qe6+. |
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| Aug-31-17 | | NBZ: <goodevans> That must be it. For my part, at least, I spent much time looking at Rxe6 before realizing that Re3 does it. |
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| Sep-01-17 | | kevin86: White must chase the queen before proceeding. |
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| Jul-05-21 | | Chesgambit: Chigorin is genius player he just blunder when he get winning position |
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| Jul-05-21 | | Chesgambit: 22 Kh1 |
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< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
Kibitzing
sac: 22.Re6