Mar-07-04
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| kevin86: subtle and brutal at the same time! If bishop takes rook, xe6 gathers the queen |
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Mar-07-04
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| patzer2: While today's problem solution 23. Rf6! is a strong move. The followup 25. Re6! is even more surprisomg and decisive. If 24...Qxf6, then 25. Ne8+ wins.
If 24...Kxf6, then 25. Qh4+ g5 26. Qxh6+ wins. |
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| Mar-07-04 |
| Shadout Mapes: I guessed 23.Rxf6 Rxf6 24.Qxe5 Ng8 25.Ne8+. does this win also? |
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| Mar-07-04 |
| DWINS: Shadout Mapes, Your line wins but only because 24...Ng8 is a mistake. 24...Kf7 is a much better move and now Black has the advantage. |
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| Mar-07-04 |
| yoniker: DWINS i think that you are wrong and that white can draw or win after 24..kf7. Rxf6 Qxf6 Qe8+ kg7 d7 |
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| Mar-07-04 |
| DWINS: Yoniker, In your line, what does White do after 27...Qd4+ followed by 28...Qxd7? |
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Mar-07-04
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| euripides: What is the win after 24...Kxf6 25 Qh4+ g5 26 Qxh6+ Kf7 27 Qxh7+ Kf6 28 Qh6+ Kf7 ? e.g. 29 Be2 g4 is not absolutely clear. White certainly has a perpetual but I couldn't see a cleart win. Perhaps simply 29 Be2 g4 30 hg is enough ? |
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| Mar-07-04 |
| Egghead: euripides, if 24...Kxf6 25.Qh4+ g5 26.Qxh6+ Kf7 27.Qxh7+ Kf6 then 28.Nd5+ Ke6 29.d7 Kd6 30.Qg6+ Kxd7 31.Be2 Qf8 32.Qh7+ Kd6 33.Qc7+ Ke6 34.Bg4+ Qf5 35.exf5#. For that reason, 25. ... g5 is not best for Black -- he can stay alive only by sacrificing his queen (25. ... Kg7). |
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| Mar-07-04 |
| Calchexas: It's pretty amazing that White saw this OTB. Obviously, he wanted a way to play Ne6+! without Black's Bishop causing any problems. But 23. Rxf6! looks very unrelated, so I highly doubt even Black suspected anything would go wrong. |
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Mar-07-04
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| crafty: 24... xf6 25.  h4+ g7 26. xd8 f7 27. e8+ f8 28. e7+  (eval 12.95; depth 15 ply; 1000M nodes) |
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Mar-07-04
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| patzer2: In addition to the nice ending to this game, perhaps another reason today's Sunday problem (23. ?) was considered difficult was due to the complicated mating variations White would have had to calculate if Black had played 24..Kxf6. While 24...Kxf6 25. Qh4+ g5 (if 25...Kg7 is slightly better, it is not too much of an improvement as crafty points out above) 26. Qxh6+ wins, the win is not so obvious after 26...Kf7 27. Qxh7 Kf6. In this position, according to Fritz 8, White now has the pleasant choice of three good moves leading to a forced mate, including 28. Nd5+ (#13) or 28. Be2 (#13) or 28. h4 (#15). After Fritz 8's first choice 28. Nd5+ (following 24...Kxf6 25. Qh4+ g5 26. Qxh6+ Kf7 27. Qxh7 Kf6 28. Nd5+), play could conceivably continue 28...Ke6 29. d7! Kd6 <if 29...Qxd7 then 30. Qg6#> <if 29...Bxd7, then 30. Qg6+ Qf6 31. Qxf6#> <if 29...Qf8, then 30. Nc7+ Kd6 31. Ne8+ Kc6 32. d8(Q) > 30. Qg6+ Kxd7 31. Be2! Qe8 <if 31...Qf8, then 32. Qxg5+ Kd7 33. Qxe5 Qd6 34. Bg4+ Kc6 35. Qe8+ Bd7 36. Bxd7 Qxd7 37. Qxb8 > 32. Bg4+ Kd8 33. Qxg5+ Qe7 34. Qxe7# |
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| Mar-07-04 |
| Dick Brain: <patzer2> after 24..Kxf6 25. Qh4+ g5 26. Qxh6+ Kf7 27. Qxh7 Kf6 28. Be2 I just said 1-0 in my analysis. Surely few if any of us can see to a mate in 13 in general. |
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Mar-07-04
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| patzer2: <Dick Brain> I confess I had only gotten as far as 24..Kxf6 25. Qh4+ g5 26. Qxh6+ Kf7 27. Qxh7 Kf6 28. Nd5+ (assuming White still had time to followup with a timely Be2) when I concluded it was 1-0. However, your comment makes a good point that top players do not always see all of the possibilities in a position before making a winning tactical move. I suspect to some extent even the strongest Masters occasionally make attacking moves in complex positions based on a combination of positional judgment, experience and intuition. |
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Mar-08-04
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| euripides: Thanks to all for the elucidation; I hadn’t considered 29 d7. Incidentally, in the line I gave after 29 Be2 g4 ? 30 Qh7+ and White will win the Q by a skewer next move. Black can fight on after 29 Be2 Qf8 30 Qxg5+ Qg7 31 Qxg7+ Kxg7 32 Be8 but the d pawn will cost Black at least a piece e.g. 32…b6 33 d7 Bb7 34 Ne6+ and the pawn queens, or 32…Kf8 33 d7 and White will have 2 pieces + pawns for the rook. Of course 28 Nd5+ is better if it generates a forced checkmate. I guess whether you need to calculate this depends on how good your intuition is – I had considered Nd5 but thought the immediate Be2 was stronger because Nd5 helps the king to reach the queen’s side via e6, d7 and c6. Without 29 d7 !, I think this plan might work for Black. White could just rely on being two pawns up for the exchange with better pieces and a perpetual in reserve, but I think it would be brave to rely on the intuition that there’s going to be a checkmate. The puzzle is also hard because after 24 Qe5 it is not obvious that 24 … Kf7 is the best move. The other moves lose rather trickily e.g. in Shadout’s line 23.Rxf6 Rxf6 24.Qxe5 Ng8 25.Ne8+.Kf7 26 Nxf6 Nxf6 I think white wins by 27 Qc3 ! and the threat of e5 is decisive. Similarly after 24… Bd7. Having seen these, one expects a win after 24…Kf7 as well but it doesn’t seem to be there. Hendricksen had to consider both continuations at move 24 and choose the better one. |
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| Jan-14-08 |
| D.Observer: Is there a problem with 24. ... xf6? |
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| Sep-13-08 |
| belgradegambit: 24. ... Kxf6? 25 Qh4+ picks up the queen. |
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