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< Earlier Kibitzing · PAGE 2 OF 2 ·
Later Kibitzing> |
| Feb-08-18 | | thegoodanarchist: Easiest Thursday ever! |
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| Feb-08-18 | | malt: Have <41.R:d4> ed4 (41...Kg7 42.Rd3 Rfd7 43.Rfd1 )
42.e5 Qg7 (42...Qh6) 43.e6 |
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| Feb-08-18 | | mel gibson: Stockfish 8 agrees:
41. Rxd4 (41. Rxd4 (♖d1xd4 ♔g8-g7 ♖d4-d3 ♖f7-d7 ♖f1-d1
♖d8-e8 ♖d3-c3 ♕f6-f7 ♕d5-d2 ♔g7-h6 ♖c3-c6 ♖e8-f8 ♖d1-f1 b6-b5 ♕d2-c3 ♕f7-f6
♖f1-d1 ♔h6-h7 ♕c3-c5 ♕f6-f7 ♖d1-d5 ♖f8-d8 ♕c5xb5 ♔h7-g7 ♕b5-c5 ♔g7-g8
♕c5-c4 ♔g8-f8 ♕c4-c1 ♕f7-f6 ♕c1-c5 ♔f8-g8 ♖d5-d2 ♔g8-f8 ♕c5-d5) +5.64/32
55)
score for White +5.64 depth 32 |
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| Feb-08-18 | | gofer: Well the rook sac looks sound...
<41 Rxd4 ...>
Ignoring it just means that black is now two pawns down, but it is probably black's best option. Accepting the sacrifice seems a bad idea. <41 ... exd4>
<42 e5! ...>
42 ... Qe7?
43 dxe7 Rxd4
44 e8=Q+ +-
<42 ... Qg7> (Qh8/Qh6 seem to be worse) <43 e6 ...>
43 ... Rf6?
44 e7+ +-
43 ... Rdf8?
44 e7! Re8
45 Re1 +-
43 ... Rff8?
44 f6 +-
<43 ... Qf6>
<44 e7 ...> +-
~~~
Yep! |
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| Feb-08-18 | | zb2cr: 41. Rxd4!, exd4; 42. e5, Qg7; 43. e6 and White will recover his Rook with a dominant-looking endgame. |
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| Feb-08-18 | | Walter Glattke: 43.-Kf8? 44.f6 Rxf6 45.e7+ Ke8 46.Rxf6
Qxf6 47.Qg8+ Kd7 48.Qxd8+ or 46.-Rd7 47.Rf8+ Qf8 48.exf8Q+ Kxf8 |
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| Feb-08-18 | | ventricule: For me, the hardest line to analyze was
<41. Rxd4 Rxd6 42. Qxd6 exd4 > where it temporarily looks like white did not win anything. Exchanging queens with <43. Qxf6> and pushing the d and e pawns is tempting, but is not as clear cut as the main line. Stronger is <43. Qd5> as <agb2002> rightly suggests, but seeing this requires a bit of work. |
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| Feb-08-18 | | morfishine: To pull this off against the powerful Yusupov is truly remarkable ***** |
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| Feb-08-18 | | Eduardo Leon: The pawns bulldozed their way through. Not difficult to see, but still beautiful. |
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| Feb-08-18 | | RKnight: To all you eagle-eyed rook-sac problem solvers: I failed to even consider 41. Rxd4. What's your secret? I solved the Tues and Wed puzzles and others too, but occasionally total blindness takes over. |
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Feb-08-18
 | | mjmorri: <RKnight> The pawn tsunami resulting after 41.Rxd4,exd4 makes it at least worth looking at. |
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| Feb-08-18 | | patzer2: I missed finding the win for today's Friday puzzle (41. ?) because I couldn't resist the positional move 41. Rc1, putting my Rook on an open file. Unfortunately for me, this puzzle is not one that calls for quiet positional play. My 41. Rc1 fizzles out to a level position after 41. Rc1 Qxd6 42. Qxd6 Rxd6 43. Rfd1 b5 = (0.00 @ 34 ply, Stockfish 8). Instead, White wins with the aggressive tactical move 41. Rxd4!! exd4 42. e5 +- (+6.36 @ 31 ply, Stockfish 8) when White's combination wins back the sacrificed Rook with decisive advantage. P.S.: According to the computer, Black's clear losing move was 27...Bf6 allowing 28. f4 +- (+1.99 @ 29 ply, Stockfish 8).
Instead, the second player can put up more resistance with 27...Ng6 28. c5 dxc5 29. Nxc5 Qc6 30. Qd5 Qxd5 31. Rxd5 Rb8 ± to +- (+1.57 @ 35 depth, Stockfish 8). Earlier in the game, Black can apparently improve on 14...Rxe6 15. Bxf3 Rxf3 16. Ne4! ± (+1.02 @ 30 ply, Stockfish 8) with 14...Qxe6 15. Bxf3 Rxf3 16. Ne4 Qc8 17. Ba3 ⩲ (+0.64 @ 40 ply, Stockfish 8). Though it's difficult to prove Black's Knight is "dim on the rim" after the seldom played 5...Nh6!? 6. Nge2 ⩲ (+0.35 @ 30 ply, Stockfish 8), I prefer the popular move 5...d6 = (0.00 @ 31 ply, Stockfish 8) as in Black's win in Ivanchuk vs M Mchedlishvili, 2017. |
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| Feb-08-18 | | Geronimo: I could see as far as 43...Qf6 on the text moves, but only count a half-point for this elegant puzzle, as I didn’t even consider the alternative line 41. Rxd4 Rxd6 42. Qxd6 exd4. Also, 44. e7 is a beautiful move, and better than recapturing the rook on f7, which I probably would have done breaking the pawn roller and losing a big part of the advantage. |
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| Feb-08-18 | | CopyBlanca: What if Black does not accept the sacrifice of the rook and just tries to keep the position blocked? Penrose gave an example of such a blocked position where if the computer declines the sacrifice it is a draw but a computer can not see that opening the position is much worse than a gain of a rook and will always take the rook. Penrose's point is that a computer does not know what is doing and that a ten year could see it is best to leave the position blocked. |
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| Feb-08-18 | | CopyBlanca: I should add that this was not Jonathon Penrose , but Roger Penrose the expert on artificial intelligence. In his example all 16 pawns opposed each other and the position was 100 per cent blocked. This position is close to his example. |
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| Feb-09-18 | | landshark: Anybody else like 43 f6? From my quick look it seems to put Black in a world of hurt.... |
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| Dec-27-18 | | bubuli55: “Csom Like It Hot” |
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| Jul-21-20 | | Brenin: It seems invidious to criticise the follow-up to this great sacrifice, but surely 46 Re1, threatening Re7, was stronger than allowing Black's Q some unexpected freedom with Rd1? That Black d-pawn was going nowhere. |
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Jul-21-20
 | | offramp: Today's title, <"Third Pawn is the Csom">, is based on that wonderful old Rwandan adage, "Third time is the charm". For it to work, you have to pronounce Csom with an <extremely> south Rwandan accent, which is very like Bostonian. |
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| Jul-21-20 | | Ironmanth: Wow. This game certainly will be studied well, as at first go-through, I just did NOT understand it. Thanks, chessgames! Y'all stay safe out there in chess land! |
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| Jul-21-20 | | Brenin: Thanks, <offramp>, for that explanation. I can't recall ever hearing or seeing "Third time is the charm", but then I don't often visit Rwanda (or Boston). Where I live it's always "Third time lucky". |
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| Jul-21-20 | | Howard: Was not even aware that Yusupov had lost a game at the 1982 Olympiad. |
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Jul-21-20
 | | perfidious: <Howard>: http://www.olimpbase.org/1982/1982u... |
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| Jul-21-20 | | siggemannen: Csomthing wicked this way come (white's pawns) |
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Jul-21-20
 | | Annie K.: The only requirement for this excellent pun is to pronounce Csom correctly. Which means, as "Chom". :) |
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Kibitzing
sac: 41.Rxd4