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| Jan-08-11 | | SamAtoms1980: After 51 ... Rxd2 52 Qxd2 Qd4+ 53 Qxd4 cxd4, Black's connected passed pawns look kind of scary. If 51 ... Rxd2 52 Qxd2 Qd4+ 53 Ke1 Qg1+ 54 Bf1 Qxg3+. |
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| Jan-08-11 | | David2009: E Eliskases vs Szabo, 1962 Black 51...? Black has a powerful passed Pawn which can be mobilised starting 51...Rxd2 52 Qxd2 Qd4+ and now (A) 52 Qxd4 cxd4 is horrible for White
(B) Ke1 Qg1+ sheds material, which leaves (C) 52 Qe3 Ba4 53 Qxd4 cxd4 and Black penetrates. Time to
check:
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Missed it. Fritz 6 check: my line seems to win (at least against Fritz 6 in blitz mode)
51...Rxd2 52.Qxd2 Qd4+ 53.Qxd4 cxd4 54.Ke1 Kc5 [54...Ba4?? 55.bxa4 b3 56.Kd2 Ka5!? 57.c5! 1-0] 55.Kd2 d3 56.Bxd3 exd3 57.Kxd3 Bd7 58.Ke3 Ba4 
click for larger view Fritz 6 blitz continues
59.g4!? hxg4 60.h5 Be8 61.h6 Bg6 62.Kd3 Bh7 63.Ke3 Kb6 64.Kd3 Kc7 65.Kd4 Kd7 66.Ke3 Ke7 67.Kf2 Kf6 68.Kg2 Bg6 69.Kg3 Be8 70.Kf2 Kg6 71.Ke2 Kxh6 and Black wins. However I think myself fortunate since my line (C) loses. Fritz 6 not being public domain, here's a Crafty End Game Trainer colours-reversed link to practice the variations:
click for larger view (E Eliskases vs Szabo, 1962 51...? colours reversed) which is the puzzle position with White to play. Crafty EGT link: http://www.chessvideos.tv/endgame-t....
The EGT reaches the equivalent of the first diagram above and captures the Bishop, which also loses. However the variations are complex and the game line starting 51...Rh3 is more clear-cut. Enjoy winning the colours-reversed position against Crafty EGT by various methods, and testing the numerous alternatives. For hints on setting positions up in Crafty, visit crafty chessforum. |
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| Jan-08-11 | | mastermind7994: Not even close. I was rooting for 51...Qa1. |
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| Jan-08-11 | | vanytchouck: after a quick look, i've seen the idea Rb2 and Ba3 (because of the pin) but the move Bd1 for white seems to handle this (somehow, i forget the pin !!!). Then i saw Rxd2 followed by Qd4.
If Qxd4, black have two heavy connected passed pawns (with the black king closer to get into the white position). If Ke1, then Qg1 + winning 2 paws.
But, there also is Qe3 for white ...
Too bad.
Need to think longer ... |
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| Jan-08-11 | | patzer2: For today's Saturday puzzle (51...?), the partly closed position and the more advanced Black pawns suggest the possibility of a decisive pawn promotion. In the game, Black exploits this idea by setting a pin with 51...Ra3!!, which solves our puzzle and prepares the followup 52...Ba4! The only likely exception to the 52...Ba4! followup occurs after 51...Ra3!! 52. Rd1 Qb2!  . P.S.: My attempt was 51...Rb2!? which might still win. However, 52. Bd1! allows White to put up some stiff resistance in a very difficult position. |
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| Jan-08-11 | | Fuegoverde: I get the idea, 51... Ra3, 52 Bd1 Ba4! and I was quite sure that white can't take the bishop. But that was all, I couldn't see more. Too dificult for me. |
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| Jan-08-11 | | 1.e4effort: i guess i gave up too soon, which is a product of my natural inclination to impatience and also why i only play recreationally. i had all the beginnings of the right ideas - the offered Bishop, the Queen swap. Didn't really like the option of trading the Rooks too early, but that was also on my list of candidates. And i figured it was going to come down to a pawn advantage at the end. i need to take more time and try to see through things better, but i'm too impatient. Did i mention that?!?! |
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| Jan-08-11 | | kevin86: Far above my pay grade! The goal was to go after the b-pawn,after which black would find a breakthrough into white's position. |
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| Jan-08-11 | | vanytchouck: < vanytchouck: after a quick look, i've seen the idea Rb2 and Ba3 (...)>
Of course, i mean Rb2 and Ba4.
And in fact, Rb2 doesn't work ... |
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| Jan-08-11 | | howlwolf: I saw yesterday's solution instantly so I thought I saw today's as well. I think Szabo's plan which was the culmination of a very well played game is superior to the 52. . . Qd4+ that clearly a lot of other folks strongly considered. So I don't feel too bad. Patience, Grasshopper I tell myself. |
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Jan-08-11
 | | Jimfromprovidence: I could not beat the main line.
I saw 51...Ra3 52 Bf3!? (this move keeps the second rank open for the rook). 52 ...Ba4 53 Bd1 Qc3 54 Qxc3 54 bxc3 55 Rc2 and maybe white's not so bad off. 
click for larger viewNow I'm thinking after 55...Rxb3 56 Ra2?!, forcing 56...Rb4. But instead black wins devestatingly and instantly with 56...Rb2+! 
click for larger view Oh well. I tried. |
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Jan-08-11
 | | doubledrooks: I found the game continuation through black's 54th move: 51...Ra3 52. Bd1 Ba4 53. Bc2 Qc3 54. Qxc3 bxc3
There were many other variations to consider (too many for me to look at all of them). However, after 52...Ba4 I did examine 53. Qe2, giving up the white b pawn for black's h pawn and creating a passed h pawn for white to boot. But since the black b pawn would be closer to queening than white's h pawn, it looked good for black to me. |
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| Jan-08-11 | | HowDoesTheHorsieMove: Houdini 1.5 likes 51...Rxd2 about the same as Ra3, with a large advantage for black either way. |
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| Jan-08-11 | | agb2002: The material is even.
White threatens 52.Rxa2.
The pawn on b3 seems to be White's weakest point. Therefore, 51... Ra3 A) 52.Bf1 Ba4 wins the pawn.
B) 52.Bd1 Ba4
B.1) 53.Ke2 Qc3
B.1.a) 54.Qxc3 bxc3 55.Rc2 Bxb3 56.Rc1 (56.Rxc3 Bxd1+) Bxc4 - +. B.1.b) 54.Rc2 Qxe3+ 55.Kxe3 Bxb3 - +.
B.2) 53.Bc2 Qc3 54.Qxc3 bxc3 55.Rd1 Ra2 (55... Bxb3 56.Rb1) 56.bxa4 Rxc2+ followed by 57... Rg2 and ... Rxg3. B.3) 53.Re2 Qa1 54.Bc2 Qh1 with the threat ... Ra1 and ... Rf1+. Another idea is to try to take advantage of the advanced pawn on b4 by preparing ... Ba4 but it is necessary to eliminate some defenders, 51... Rxd2 52.Qxd2 Qd4+: A) 53.Ke1 Qg1+ 54.Bf1 Qxg3+ and 55... Qxb3 - + [2P].
B) 53.Qxd4 cxd4
B.1) 54.Ke1 d3 55.Bd1 (55.Bf1 leaves the Pb3 unprotected and loses sight of the Ph5) Kc5 56.Kd2 Kd4 57.Bf3 e3+ followed by ... Kc3 - +. B.2) 54.Bd1 Kc5 55.Ke2 and Black gets stuck.
C) 53.Qe3 Ba4 54.bxa4 b3 55.Qxd4 cxd4 56.Bd1 b2 57.Bc2 d3 58.Bb1 Ka5 59.g4 and White wins. It seems that 51... Ra3 is preferable. |
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| Jan-08-11 | | Greifi: 51...Rxd2 52 Qxd2 Qd4 is also won. |
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| Jan-08-11 | | estrick: estrick: I had <dzechiel> and <al wazir's> line up to move 54. I had observed that White had the "bad bishop" and thought after the passed pawn on e4, it was probably Black's most significant positional advantage, especially after trading off the rooks and queens. But I was not able to see that White's bishop would be completely immobilized if it went to d1 followed by 55 ...d3, which then leads to the delicious zugswang that forces White to concede control of the d4 square and allow Black's king to penetrate White's ranks. My plan was to get the Black king to d4, but wasn't quite sure how it would happen, or if indeed it could be brought about. |
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| Jan-08-11 | | SpoiltVictorianChild: I'll give myself half credit. I saw the weakness in white's camp, and saw all three moves, but didn't specifically put them in order to make an attack. I did also see how white's king was stuck protecting g2, so we could play easily on the queen side. |
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| Jan-08-11 | | BOSTER: You can not win the game if none of your pieces (white ) cross the equator, "control the most territory has a spatial advantage".
For me the idea 51.Ra3 with the threat Ba4 is obvious. |
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| Jan-08-11 | | dzechiel: OK, you guys are gonna have to tell me if my original line has promise or not. At first I like it, then I thought it was busted, then I see <al wazir>'s line with the zugzwang and I like it again. I dunno... |
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| Jan-08-11 | | WhiteRook48: I had the right idea, which is better than my normal standards for a Saturday. I saw the Ba4 idea almost immediately but missed Ra3...I fail. |
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| Jan-08-11 | | wals: Light years beyond me.
Available to Black,
Analysis by Rybka 4 x64: ply 20 :
8 min :
1. (-4.05): 51...Ra3 52.Rd1 Qb2[] 53.Rd2 Qxb3[] 54.Qxb3 Rxb3[] 55.Bd1 e3+[] 56.Ke2 Rc3[] 57.Ra2 Rxc4[] 58.Kxe3 Rc3+ 59.Kd2 Bf7[] 60.Ra8 Bxd5[] 61.Rf8 Be4[] 62.Bxh5 Rd3+ 63.Kc1 Rxg3 64.Be2 b3 65.Rb8+ Kc7 66.Rb5 Rc3+ 2. (-1.96): 51...Ra8 52.Bd1 Ra3 53.Kg2 Ba4 54.Rf2 Qa1 55.Qe2[] Bxb3 56.Bxb3 Rxb3 57.Qxh5[] Rf3 58.Qg6 Rxf2+[] 59.Kxf2 Qd4+ 60.Kg2 b3 61.Qxd6+ Ka5[] 62.Qb8 Qxc4[] 63.d6 Qe2+ 64.Kg1 Qe3+ 65.Kg2 Qf3+ 66.Kh2 Qf2+[] 3. (-1.96): 51...Ra6 52.Bd1 Ra3 53.Kg2 Ba4 54.Rf2 Qa1 55.Qe2[] Bxb3 56.Bxb3 Rxb3 57.Qxh5[] Rf3 58.Qg6 Rxf2+[] 59.Kxf2 Qd4+ 60.Kg2 b3 61.Qxd6+ Ka5[] 62.Qb8 Qxc4[] 63.d6 Qe2+ 64.Kg1 Qe3+ 65.Kg2 Qf3+ 66.Kh2 Qf2+[] 4. (-1.96): 51...Ra5 52.Bd1 Ra3 53.Kg2 Ba4 54.Rf2 Qa1 55.Qe2[] Bxb3 56.Bxb3 Rxb3 57.Qxh5[] Rf3 58.Qg6 Rxf2+[] 59.Kxf2 Qd4+ 60.Kg2 b3 61.Qxd6+ Ka5[] 62.Qb8 Qxc4[] 63.d6 Qe2+ 64.Kg1 Qe3+ 65.Kg2 Qf3+ 66.Kh2 Qf2+[] 5. (-1.96): 51...Ra7 52.Bd1 Ra3 53.Kg2 Ba4 54.Rf2 Qa1 55.Qe2[] Bxb3 56.Bxb3 Rxb3 57.Qxh5[] Rf3 58.Qg6 Rxf2+[] 59.Kxf2 Qd4+ 60.Kg2 b3 61.Qxd6+ Ka5[] 62.Qb8 Qxc4[] 63.d6 Qe2+ 64.Kg1 Qe3+ 65.Kg2 Qf3+ 66.Kh2 Qf2+[] GROSS ERRORS BY WHITE-
48.Rb1, -2.23. Best, Kg2, -0.85.
Analysis by Rybka 4 x64: ply 20 :
4 min :
1.  (-0.85): 48.Kg2 Ra1 49.Rxa1 Rxa1 50.Bd1 Qc3 51.Qe2 Ra3 52.Rb2 Ba4 53.Qc2 Ka5 54.Kh3 Ra1 55.bxa4 e3 56.Bxh5 Rh1+ 57.Kg2 Qe1 50.Rd1, -3.22. Best, Kg2, -1.96.
51.Rd2, -4.05. Best, Qc1, -3.37. |
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| Jan-08-11 | | mrsaturdaypants: 51...Rxd2 52 Qxd2 Qd4+
And now the key is that 53 Qxd4 cxd4 leaves black with a devastating pair of past pawns, so white must choose between Ke1 and Qe3. (a) 53 Ke1 Qg1+ 54 Bf1 Qg3, and black must be winning or very close to it. (b) 53 Qe3 Qb2, and I'd rather be black, but I don't see a clear win (though Ba3, followed by pushing the b-pawn looks threatening). Hmm. So maybe instead: 53 Qe3 Ba3, and now I think white has to play 54 Qxd4 cxd4 55 Bd1 Be8. If that's not winning, it'll do until the real thing comes along. Time to check. |
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| Jan-08-11 | | muralman: Another great puzzle that fits me to a tee. I looked over all the combinations. I knew I needed to come out ahead, nut necessarily in pieces, but certainly in position. Szabo followed through just as I had envisioned. I piled an overwhelming pressure on the White b3 pawn. White gamely responded with it's Bishop. Throwing the Queen in as a forced trade sealed the deal. Following trades set up the resulting g3 pawn ensuring the win. My rook is free to pick apart what's left of White's pawn foundation. Resignation of White is no surprise. |
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| Jan-09-11 | | M.Hassan: "Very Difficult" Balck to play 51...?
Materials even
I worked hard on this puzzle. Last night and today!.My solution is lengthy.I hope it be right51.............Rxd2
52.Qxd2 Qd4+
Two combinations emerge from here.One is based on Queen capture, the other on King move:
First Queen capture:
53.Qxd4 cxd4
54.Ke1 d3
55.Bd1 Kc5
56.Kd2 Kd4
57.Ke1(no other move) e3
58.Bf3 Kc3
59.Kd1 Kxb3
60.c5 dxc5
61.d6 Bd7
62.Bxh5 Kc3
63.Bf3 [bad FEN: b38/3b4/3P4/2p2p2/5P1P/1pkppBP1/8/3K4] With Black's 3 passed pawns, it's time for White to resign. King movement after check:
53.Ke1 Qg1+
54.Bf1 Qxg3+
55.Kd1 Qxh4
56.Qe3 Qh1
57.Ke1 h4
58.Ke2 Qh2+
59.Qf2 Qxf2
60.Kxf2 Bh5
61.Kg2 Bg4
62.Kf2 h3
From here onwards, Black King has a lengthy journey to reach to g or h file. If White King leaves f file to stop the othe King, eithe e or h pawns push forward towards promotion.
Time to check |
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| Jan-09-11 | | patzer2: One interesting winning line is 51...Ra3 52. Bd1 Ba4 53. Re2 Qa1! 54. Rd2
click for larger view54...Bxb3! 55. Bxb3 56. Qb1  using a pin to win back the temporarily sacrificed Bishop with a decisive extra pawn advantage. |
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