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| Feb-12-11 | | castle dweller: I found a slightly different route (along the same theme) that leads to the same result. After 46. Bd1, Ke4 - I went 47.Bxh5, and followed up with 48.Bg4 on the next move. Doing that can prevent the black f-pawn from promoting and give white just enough time to promote first for the win! Black cannot push the a/b pawns in time because White's new Queen at h8 will be able to cover a1 - and if black queens at b1, the white bishop can move Bf5, attacking the K and winning the new Q at b1! |
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Feb-12-11
 | | julesdebr: What about 41. - Kg7? It seems to lead to a draw. |
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Feb-12-11
 | | patzer2: I found 46. Bd1! Ke4 47. Kxh5  easily enough, as my attempt at solving today's Saturday puzzle, but didn't see the need to play 48. Kg4 to chase the Black f-pawn.It was a clever winning followup with 48. Kg4 though, as in the final position it's mate after 55...Ke3 56. Bg2#. Checking it with Fritz, I found my planned 48. Kg5 with the idea of giving up the Bishop for the f-pawn and pushing the White passer works just fine. For example 48. Kg5 Ke3 49. Bxf3 Kxf3 50. h5 is a simple endgame win. P.S.: One mistake for White to avoid is 47. Bxh5? when it appears Black can hold the draw after 47. Bxh5? b4!, after which play might continue 48. Bg4 (48. Bd1 f3 49. h5 f2 50. Be2 a4 51. h6 Ke3 52. Ba6 b3 53. axb3 axb3 54. h7 b2 55. h8=Q b1=Q+ =) 48... a4 49. h5 b3 50. a3 f3 51. h6 f2 52. h7 f1=Q 53. h8=Q Qa6+! =. |
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Feb-12-11
 | | Eyal: <castle dweller: I found a slightly different route (along the same theme) that leads to the same result. After 46. Bd1, Ke4 - I went 47.Bxh5, and followed up with 48.Bg4 on the next move. Doing that can prevent the black f-pawn from promoting and give white just enough time to promote first for the win! Black cannot push the a/b pawns in time because White's new Queen at h8 will be able to cover a1 - and if black queens at b1, the white bishop can move Bf5, attacking the K and winning the new Q at b1!> The Bg4-Bf5+ idea is nice, but it's only a draw – the bishop can’t handle from there both the f-pawn and the Q-side pawns. 46.Bd1 Ke4 47.Bxh5? b4 (not 47...f3?? because with the king on g6 White can simply play 48.Bxf3 and then queen his pawn first) 48.Bg4 a4 49.h5 b3 50.a3 (White has to prevent bxa2, and 50.axb3?? a3! Doesn’t help - Black queens on a1 before White, and stops the queening on h8) 50...f3! - and White has nothing better than allowing Black to queen the f-pawn while he queens the h-pawn: 51.h6 f2 52.h7 f1Q 53.h8Q Qa6+ forcing either a perpetual or a queen exchange, after which it’s a simple draw. 50.Bf5+ Ke3 or 50.Be6 f3 don't make a difference. |
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| Feb-12-11 | | knight knight: Ok 46. Bd1 seems the most logical move. Capture on h5 with the bishop, bring the bishop back and push the h-pawn, fenced by the white king. 46...Kd4 47. Bxh5 Kc3/e3 48. Bg4 black is wasting moves here with his king... 46...a4 47. Bxh5 b4 48. Bd1 a3 49. h5 f3 50. Bxf3 b3... right ok here's the problem for white. Instead of capturing on f3, let's play... 50. h6 f2 51. Be2 b3 52. axb3... a skewer lurks... 52...a2 53. h7 a1=Q 54. h8=Q+ K moves 55. Qxa1 game over I can't see a saving line for black after 46. Bd1, altho haven't spent a great deal of time on today's puzzle. |
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| Feb-12-11 | | 1.e4effort: i've looked at moving the B to d1, and a2-a4, and sliding the K amid the 2 pawns. and now i'm gonna look at the solution. happy anniversary <once>. i'm in the same state of marital bliss as you, minus the lad (we're too old - our children from our previous marriages are grown) |
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| Feb-12-11 | | 1.e4effort: B-d1. crap, i thought that might be it. brilliant end game strategy by Jiminez. Abergel, maybe not so much. |
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| Feb-12-11 | | knight knight: <David2009: White's most direct winning plan is 46.Bd1-Bxh5-Bd1 etc. Unfortunately this loses: 46 Bd1 a4 47 Bxh5? b4 48 Bd1 b3 49 axb3 a3! and Black wins.> Indeed, and the first kibitzer to spot this line! Missed it in my brief analysis. |
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Feb-12-11
 | | Marmot PFL: Dont see a clear win here but white has all the chances 46 Bd1 Ke4 47 Kxh5 f3 48 Kg5 f2 49 Be2 Ke3 (49...b4 50 h5 etc and both queen but white wins with Qh7+) 50 Bf1 b4 51 h5 a4 52 h6 b3 53 ab ab 54 h7 b2 and white queens first with an extra piece, though it may only be a draw. |
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Feb-12-11
 | | dotsamoht: <patzer2> Of course, you mean 55...Ke4 56 Bg2#. This is a really beautiful end to the game! Thrilling! |
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Feb-12-11
| | Eyal: <Marmot PFL: Dont see a clear win here but white has all the chances 46 Bd1 Ke4 47 Kxh5 f3 48 Kg5 f2 49 Be2 Ke3 (49...b4 50 h5 etc and both queen but white wins with Qh7+) 50 Bf1 b4 51 h5 a4 52 h6 b3 53 ab ab 54 h7 b2 and white queens first with an extra piece, though it may only be a draw.> This actually illustrates that in a practical game situation one doesn't have to see the whole idea from the start in order to play correctly – you do the best that you can, realizing you can’t prevent Black from queening and avoiding the draw with 47.Bxh5?, thinking that at least you’ll remain a piece up and could keep playing for a win; hopefully, somewhere along the line you also realize that after the mutual queening of pawns White can deliver mate in two… |
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| Feb-12-11 | | newzild: In deference to today's player of the day, Mr Petroff, and to the game of the day, which featured an offbeat opening, I went online with the resolution to play Cochrane's 4.Nxf7 piece sacrifice against Petroff's Defence. Surely there is no other opening in chess in which so much is sacrificed so early?: [Site "Chess.com 5 minute blitz"]
[Date "2011.02.12"]
[White "Newzild"]
[Black "Computer - Hard 2076 Elo"]
[Result "1-0"]
1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Nxf7 Kxf7 5. Qh5+ Ke6 6. Qg4+ Kf7 7. Qxe4 d5 8. Qf3+ Kg8 9. d4 Nc6 10. c3 h5 11. Bd3 Bg4 12. Qf4 Bd6 13. Qg5 Be7 14. Qe3 Rh6 15. O-O Re6 16. Qd2 Rf6 17. f3 Bf5 18. Bxf5 Rxf5 19. Qd3 Qd7 20. Be3 a5 21. Nd2 Raf8 22. Rae1 h4 23. h3 Kh8 24. Bf2 R5f7 25. Re2 g5 26. Rfe1 Bd6 27. Nf1 Rf6 28. Ne3 Ne7 29. Ng4 Rf5 30. Re6 Ng8 31. Kh1 a4 32. Bg1 Bg3 33. R1e2 c6 34. Bh2 Bxh2 35. Kxh2 Qf7 36. Kg1 a3 37. b4 Qd7 38. Qc2 Qc7 39. Qc1 Qg3 40. Kh1 Kg7 41. R6e3 Kg6 42. Qc2 Qf4 43. Re5 Kh5 44. Rxf5 Qxf5 45. Qxf5 Rxf5 46. Re6 Rf7 47. Kg1 Ne7 48. Rh6# Odd that the computer let itself get mated at the end. |
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Feb-12-11
 | | kevin86: Wow,No way I could look that far ahead! Sooner,I can turn into a seal and swim the Atlantic. |
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| Feb-12-11 | | carl giraffe: took me a few minutes to see but there is a cute draw for Black if white tries 31.Bxf7+ to pick up the Rd6. I knew there must be a reason 2 GMs would leave such a simple tactic like that alone. :) |
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| Feb-12-11 | | jdc2: Anyone know why, after the game
continuation after 47...f3, why
white can't play Bxf3 and then queen
his h pawn? |
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Feb-12-11
| | Eyal: <jdc2: Anyone know why, after the game continuation after 47...f3, why
white can't play Bxf3 and then queen his h pawn?> He can - but then Black will be on time to queen his own b pawn, after b4-a4-b3 etc., and it's a draw. Note that White has to waste a move in order to remove the king from the pawn's way. |
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| Feb-12-11 | | BOSTER: To understand this ending I'd like to see what black want to do if they had a move now.
They'd play f3 and white have to protect f1 square from queening, so they have to play the bishop on f1-a6 diagonal. This gives black the time to create the pass pawn on the queen's side, and white bishop can not hold both pawns "a" and "f" (or b and f).
That means that the first white move in this position should be 46.Bd1 . And game continues like this 46...Ke4 47.Kxh5 f3 48.Kg4 f2 49.Be2 b4 50.h5 a4 51.h6 b3 52.axb3 axb3 53.h7 b2 54.h8=Q b1=Q 55.Qh7+ and white win. |
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Feb-12-11
 | | Jimfromprovidence: So, 41...Ke6 was the losing move I'm guessing, allowing 42 Kg5.
click for larger viewNow black has to push pawns when he'd rather not do so; he ends up with a losing position as occurs with the text. It looks like 41...Kg7 instead allows black some kind of fortess. 
click for larger view |
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Feb-12-11
 | | scormus: <Once> I might not have got the puzzle, but your post has made my day. I hop you have 11 more great years, and then another 11. BTW, you never know, you might even get to like the KID. (Dont expect you'd ever get to like Luton though) |
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| Feb-12-11 | | alachabre: Situational assessment:
White's king is in front of his pawn, and its advance cannot be stopped after Black's h-pawn is captured, provided Black's king can be momentarily blocked from the f-file. Hence 46. Bc2
seems to be indicated. If then
46. ... f3
47. Bd3 b4
48. Kxh5 Kf6
Looks like Black stops the pawn here, but can he win? Probably, with 49. ??? f2
and then advancing the Q-side pawns to the point the B gets deflected off the queening diagonal f1. But then White does have a 49th move...
49. Kg4 f2
50. Kf4
and now Black has a terrible choice between allowing the h pawn to score, or allowing White's king to demolish the Q-side pawns. It's beginning to look like the key is blocking Black's K's access to f5 so White's king can slip to the left coast. So far I like 46. Bc2. How can Black improve? This is apparently the weak point of my analyses, so going to concentrate harder this time. 46. ... Kd4
trying to keep White's B off d3. This seems like good strategy, since White's K can't "step into the square" and stop the e pawn, and the B must do the job. 47. Bf5
From here, the B can swing between protection of the a pawn and guarding the queening square e1. 47. ... b4
to stop the move Bd3 from gaining a tempo.
48. Kxh5 f3
49. Kg5 f2
50. Bh3 Ke3
and now I believe White has the time to queen his unstoppable pawn after giving up the B on e1 before Black can get close to queening on the other side. This is always the hard part for me in pawn endgames, counting the steps accurately. Well, surely not a terribly exhaustive analysis, but I like it and I will confidently play 46. Bc2 |
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| Feb-12-11 | | riverunner: 1. Bd1
2. Bxe5 wins fine too. |
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| Feb-12-11 | | WhiteRook48: aah i failed |
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| Feb-12-11 | | alachabre: With help from Ruffian, it appears Bc2 is playable, but apparently Bd3 is a terrible blunder. Ah well, that's why we study! |
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| Feb-12-11 | | alachabre: To wit:
46. Bc2 f3 47. Bd3 b4 48. Kxh5 a4 49. Kg5 b3 50. axb3 a3 |
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| Feb-12-11 | | alachabre: And 46. Bc2 turns out to be a draw. Rats. |
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