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Mar-08-15 | | solver43: On the surface I like the idea of f5 by black since white can no longer protect the pawn on e5. |
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Mar-08-15 | | Steve.Patzer: <solver43> After I suggested 24....f6 I also thought f5 would be better. |
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Mar-08-15 | | agb2002: The material is identical.
White threatens 25.gxf3.
The white bishop protecs the pawn on g2. Therefore, 24... Bb5: A) 25.Bxb5 fxg2 26.Rg5 (26.Rh8+ Rd8 and the g-pawn promotes) 26... Rxb5 (26... Rxe5 27.Rg8#) 27.Rxg2 Rxe5 and Black has an extra pawn and probably a won ending due to the two linked passed pawns. B) 25.Rh1 Bxf1 26.Rxf1 fxg2 27.Rg1 Rxb5 28.Rxg2 Rxe5 as in A. C) 25.Rh8+ Rd8
C.1) 26.Rxd8+ Kxd8 27.gxf3 (27.Bxb5 fxg2 wins) 27... Bxf1 - + [B vs P]. C.2) 26.Rh1 Bxf1 27.Rxf1 fxg2 28.Rg1 Rg8 29.Kd2 Rg5 30.Kd3 Rxe5 is similar to A. |
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Mar-08-15 | | agb2002: I missed the obvious 25.c4 but after 25... Bxc4 26.Bxc4 fxg2 27.Rg5 Rc5 28.b3 b5 29.Rxg2 bxc4 30.Rc2 Rxe5 31.Rxc4 Black is again a pawn ahead. However, Stockfish option is the study-like move 24... f2 with ideas like ... Rd4-e4 and ... f5. Very interesting. |
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Mar-08-15 | | morfishine: White's play is not very inspiring IMO |
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Mar-08-15 | | goodevans: 24.Rd8 was neat (I didn't get it) and l really like the zugzwang finish, but now does black force a win after <28.Rf2>? |
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Mar-08-15 | | Once: Hmmm ... maybe. I enjoyed the little zugzwang at the end to tie white down, but I'm not too sure about the rest of the game continuation. Like agb I went with 24...Bb5 to try to exchange pieces. Several messy lines, nothing worth writing down. It keeps a small black advantage according to silicon. Fritzie says that strongest move is 24...f2 where black as an advantage of around two pawns. 25. Rd8 as played scores around -1. It could be met by 25...g4 which is considerably more resilient that 25...Rh2. All in all, a bit of an odd puzzle. The finish is spectacular, but with best play we shouldn't have got to it. |
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Mar-08-15 | | Cheapo by the Dozen: In simplest terms, the f3 pawn is poisoned against exchange because of ...Bxf3. It would be poisoned even if Rh8 weren't check, I think -- but since it isn't check, the pawn is poisoned times two. |
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Mar-08-15 | | watwinc: <An Englishman> <no one else in my province> Since when does an Englishman live in a province? |
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Mar-08-15
 | | Penguincw: It's been a while since the last Sunday puzzle didn't have a sacrifice. Anyway, I knew there wasn't going to be any sacrifices, so tried to win material. The first moves I went for were 24...fxg2 25.Rxg2 (R moves), followed by 26...f6, but that could easily be prevented. |
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Mar-08-15 | | CHESSTTCAMPS: Material is even, but black has an advanced passed pawn, white's rook is passively tied to the defense of e5, white's bishop has no good moves, the white king is cut off from the king-side, and the back rank is potentially vulnerable to a rook check that forks B+K. I considered 24... f5, which is interesting, but it gives up f3 too easily. The circumstances call for 24... f2!
The white rook can't get behind the pawn and now there is real weight to the threat 25...f5 winning the e-pawn with tempo. White's options are limited. A. 25.Be2 f5! 26.Rh8+ Kd7 27.Rh7+ Ke8 28.Rxc7 Rxe5 29.Kd2 Bxg2 30.Bc4 Re1 and white can't stop f1=Q 32.Bxf1 Rxf1 with black a piece up and b7 protected. B. 25.c4 Rd4 (the threat of Re4-e1 is deadly) 26.b4 Re4 27.b5 Re1+ 28.Kd2 Be4 (Rxf1?? 29.bxc6 Rd1+ 30.Ke3) 29.Rh1 Bxg2 30.Bxg2 Rxh1 31.Ke2 f1=Q+ 32.Bxf1 Rh2+ followed by Rxb2 with an easily won ending. C. 25.Rh1 Rxe5 26.Kd2 Re1 and there is no good defense to 27... Bxg2 28.Bxg2 Rxh1 etc as in B. D. 25.b4 Rd4 26.c3 (c4 Re4 transposes to B) Re4 27.Kd2 Re1 and black again wins the B, without any counter-play for white. (28.Rh1 Bxg2) E. 25.Rh8+ Kd7 26.Rh7 Ke7 does nothing to help white. Time for review.... |
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Mar-08-15 | | CHESSTTCAMPS: I didn't consider the game continuation, which resulted in a pretty finish, but appears to be no better. |
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Mar-08-15 | | Marmot PFL: Looked at 24...Rd8 25 gf3? Bxf3 and wins but 25 g4 looks OK. maybe 24...f2 and try to play Rd4-e4-e1 is a plan. |
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Mar-08-15 | | sfm: IMHO on of the harder 'insane', with a quiet and not very intuitive move.
What an ending position!
<Both players were commendably stubborn about the f3-g2 pawn standoff, but 26. g3? makes no apparent sense.>
Well, any other move is a bye-bye to his bishop. |
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Mar-08-15 | | dfcx: I did not have a clue. Crafty prefers a simple 24...f2 preserving the passed pawn, rated at -2.3. I do not see how it will play out in the end.
Crafty defends 24...Rd8 with 25.g4 -1.5.
It's too hard to tell. |
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Mar-08-15
 | | Jimfromprovidence: That 24...f2 line requires strict attention to detail I got there in a general sense, liking the concept of the pawn on f2 and the rook on e4. Taking three moves to get there, though, I had no idea if it would work. In particular I could not make 24...f2 25 c4 Rd4 26 Kc2?! Re4 work.  click for larger viewWhite can play 27 Rh8+, then after 27...Kd7 bring the rook to the open rank with 28 Rh3.  click for larger viewSo if black plays 28...Re1 white can check with 29 Rd3+. Then we get 29...Ke7 30 Rd1 and then who knows what?  click for larger view |
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Mar-08-15
 | | Jimfromprovidence: I just now realized the trap set by 24...Rd8. White cannot play 25 gxf3 ? because of 25...Bxf3, threatening both mate and the loss of the rook.  click for larger viewThe cost is white's bishop. |
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Mar-08-15 | | BOSTER: To search the correct move in the pos. white to play 18.(diagram)
 click for larger view White queen should ask: "Which way I ought to go from here?". To play 18.Qxa7, or 18.Qxh6.
If white understood that playing 18.Qxa7, black will create the wealthy pawns majority on the king's side by playing the forcing moves, he would choose 18.Qxh6. |
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Mar-08-15 | | CopyBlanca: too bad the black King can be checked by the white rook else 28 R-g2 check would be nice. |
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Mar-08-15 | | Once: <BOSTER> Robert Reynolds was a FIDE Master with a rating at its peak of 2565. I think he had a pretty good understanding of pawn majorities. Fritz rates 18. Qxa7 as a marginally stronger move than 18. Qxh6 by about a quarter of a pawn -0.74 to -0.98. The chief problem with 18.Qxh6 is 18...Qd7 - a move which 18.Qxa7 prevents. 18. Rh3, 18. c3 and 18.f4 are also stronger than 18. Qxh6, although white is struggling whatever he plays because of the strongly posted black bishop and rook. After around 12 minutes on infinite analysis, Fritz reckons that 18. Qxh6 is the seventh best move in the position. The best move seems to be 18.Rh3, blocking the black h pawns and unpinning the g pawn. |
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Mar-08-15
 | | perfidious: It should be noted that Reynolds' rating of 2565 was from correspondence; I remember playing events with him and OTB, he was not substantially stronger than your humble commentator. |
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Mar-08-15 | | devere: 24...Rd8 is a clever move, but since White might have replied 25.g4, I think that 24...f2 would have been a more certain win. It might have followed: 24... f2 25. c4 Rd4 26. Rh8+ Kd7 27. Rh3 Re4 28. Rd3+ Ke7 29. Rd1 Re1 30. Kd2 Rxe5 31. Kd3 Re1 32. Kd2 Re4 33. Kd3 Rg4 34. Ke3 Bxg2 35. Bxg2 Rxg2 36. Rf1 Kd6 37. Kf3 Rh2 38. Kg3 Rh6 39. Rxf2 Rg6+ 40. Kh3 f5 41. Rd2+ Ke7 42. b4 Rg4 43. Rc2 Kd6 44. a3 c5 45. b5 e5 46. a4 b6 47. Rf2 Ke6 48. Rb2 Rg8 49. Rg2 Rh8+ 50. Kg3 f4+ 51. Kg4 Rg8+ 52. Kh3 Ra8 53. Rg6+ Kf5 54. Rxb6 Rxa4 55. Rc6 Rxc4 56. b6 Rb4
 click for larger view
with a clear win for Black. |
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Mar-08-15 | | CHESSTTCAMPS: Try playing the black position from the POTD position (with colors reversed) against the Crafty engine, at the following link: +at+black+move+24 +colors+reversed">http://www.chessvideos.tv/endgame-t... Good Luck! |
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Mar-08-15 | | M.Hassan: "Insane"
Black to play 24...?
Material identical
I did not find any out-of-norm move for Black and proceeded with: 24............Ra5
25.gxf3 Bxf3
26.Rh3 Be4
27.Rh8+ Ke7
28.Rf8 Bg6
29.Bd3 Bh5
30.Be5 b6
31.Kd2 Rxe5
Black is a pawn up.
Need to check the game |
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Mar-09-15 | | stst: late back sunday...
Two lines:
(A)24....Bb5 to opt for 25.BxB or 25.gxf3
(B)24.....f2
both would lead to more material for Black (at least one P up.) As time's up, let's see... |
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