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| Nov-04-07 | | sfhd: I have the feeling that White has a couple of ways to stay in the game with a solid or even slightly better position. Here are two: 25. Ka1 Be6
26. Nc6
After this, there does not seem an obvious way for black to win, or even to compensate for his sacrificed material. But it appears that Black even can accept the bishop on a2. What is important here is the move Bc4, which fixes the pawn on f7 and allows taking the pawn at g6: 25. Kxa2 Qa5+
26. Kb1 bxc3
27. Bc4 Qa3
28. Qxg6+ Bg7
29. Bxf7+ Rxf7
30. Qb6
Or alternatively:
25. Kxa2 Qa5+
26. Kb1 bxc3
27. Bc4 Rab8+
28. Nb3 Qa3
29. Qxg6+ Bg7
30. Qxg7+ Kxg7
31. Bxe5+ Kg8
32. Bxc3
Perhaps Black has a better move than 26... bxc3 or 27... Qa3/Rab8+? Any suggestions?
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| Nov-04-07 | | whiteshark: Insane, indeed.
I also got 23...Nc3+ 24.bc3 Bxa2+ relative fast, but wasn't able to calculate the rest. Only positional feelings: <25.Kc1> as best move (away from the edge) and not sure if now 25...Qxc3 26.Ne2 ... or 25...bc3 26..?? is the best continuation. <25.Ka1> Qa5 (never thought about a retreat Be6 as in the game) [missing 26.Nc6!  (it'd 've killed me otb)] |
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| Nov-04-07 | | Marmot PFL: If this was white to move it would be easy, but instead its black...Anyway 23...Nc3+ looks like the standard sacrifice, but if 24.bc3 bc3 25.Qc6 or Nb3 blocks the attack. So another scarifice 24...Bxa2+ and if 25.Kxa2 Qa5+ 26.Kb1 bc3 with threats of Rb8+ or Qa3 and mates on b2. declining the bihop is harder though and I couldn't find a decisive line. If the bishop retreats Qa5+ is threatened but white can stop this with Nc6, while Qc3+ Kxa2 Qa3+ Kb1 and black is 2 pieces down with no clear way to continue. Interesting that in the game black managed to get this same position after forcing white to return the knight, which should have won. Both players made mistakes but it seems the annotator did as well. As others noted Rfd8 was fine and would win if 34...Rc4 was played. |
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| Nov-04-07 | | willyfly: Material is even and there is an obvious ♘ sac to disrupt the protective ♙ structure in front of the White ♔ which gives check and also opens the light diagonal a2-g8 for Black's e6♗ to capture the a2♙ and give check again. But after the ♘ sac it might be advantageous for White to recapture bxc3. Now if Black can play his ♕ to b2 it would be mate except for the escape square c1. The c1 square could be covered by Black's DS♗ if it were placed on g5 maybe by way of g5 hxg5 Bxg5. Maybe this combination should begin with 23...g5 hxg5 24 ♗xg5 but now White can play 23 ♕xh7#. So this doesn't work and it's back to the original plan. 23... ♘c3+ 24 bxc3 bxc3
Black can now give check with a ♖ or the ♕ so Black has to think about making an escape route for the ♔ by playing the d1♖ to the half open e-file. 25 ♖de1 ♕b6+ 26 ♔c1 ♕b2+ 27 ♔d1 and now what?!
I think White will probably block with the ♘
25 ♘b3 ♖ab8 pins the ♘
25 ♘b3 ♗xb3 removes it and then 26 axb3 ♕a5
I haven't really solved this puzzle but these are my speculations on how I might proceed. Now I'll look and see how insane this is. -----
A Draw?!? Oh come-on! Bring on Monday!!! |
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| Nov-04-07 | | Alphastar: <sfhd:
25. Ka1 Be6
26. Nc6
After this, there does not seem an obvious way for black to win, or even to compensate for his sacrificed material.> Some research with crafty: 26. ..Rfb8! 27. cxb4 Bf5! 28. Qd5 e4+ 29. Kb1 Qxg3
I think black still has big attacking prospects here, while material is already equal. Ofcourse, taking on b8 at any given point is complete suicide. <But it appears that Black even can accept the bishop on a2. What is important here is the move Bc4, which fixes the pawn on f7 and allows taking the pawn at g6:25. Kxa2 Qa5+
26. Kb1 bxc3
27. Bc4 Qa3
28. Qxg6+ Bg7
29. Bxf7+ Rxf7
30. Qb6 >
I'll finish the line: 30. ..Raa7!  White cannot prevent the threat of Rab7/Rfb7. |
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| Nov-04-07 | | ConstantImprovement: 23. ... Nc3+ 24. bc Ba2:+
I. 25. Ka2: Qa5+ 26. Kb1 (Kb3) [26. Kb2 bc+ is hopeless, as well] bc Now White has several defensive tries to prevent the mate on the b-file, but noone works: After 26. Kb1 bc
27. Rcg1 Qa3 with mate
27. Kc1 Qa3+
27. Nb5!? ab with mate on a1
After 26. Kb3 bc
27. Nb5 ab with Qa3+ and Rfc8+
27. Nc6!? Rab8+! 28. Nc8: Rb8:+ 29. Kc4
Rb4+ 30. Kc3: Re4:+, winning
II. 25. Kb2 bc+ 26. Kc1 Rab8 27. Nb3 (Interesting is Qa5!? 28. Rcg1 Qa3+ 29. Kd1 Rb3: 30. cb Bb3:+) Rb3: 28. cb Bb3:
29. Rcg1 Qa5 and mate on a1, because the b3-bishop blocks the flight square d1. III. 25. Ka1 (25. ... Qa5? 26. Nc6 or 25. ... Qc3:+? 26. Ka2: and difficult to continue) bc This seems to be the critical line.
26. Nb3 (26. Ka2: bc and winning) Bb3: 27. cb Rb8 with a strong attack, for instance 28. Kc2 Rb3:! 29. Kb3: (Else Rb2+ and Qa5-Qa1 mate) Rb8+
30. Kc2 Rb2+ 31. Kc1 Qa5
Can White stop the mate?
32. Nc2 Qa2 33. Nb4 (Else Qb1#) Qa3! 34. Nc2 Rb1++! 35. Kb1: Qb2#
32. Nb3 Qa3 (Rb3: might be good enough, too) 33. Rdg1 Rd2+ (Rb1++) 34. Kb1 Qb2# Conclusion:
Without sidelines, the best play for both sides according to the above analysis is 23. ... Nc3+ 24. bc Ba2:+ bc 26. Nb3 Bb3: 27. cb Rb8 with a strong attack, for instance 28. Kc2 Rb3:! 29. Kb3: Rb8+ 30. Kc2 Rb2+ 31. Kc1 Qa5 32. Nc2 Qa2 33. Nb4 Qa3! 34. Nc2 Rb1++! 35. Kb1: Qb2# |
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| Nov-04-07 | | Zxookazoid7: On 25 i prefer Qxc3+!!!! |
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| Nov-04-07 | | chessmoron: Another chess puzzle===click here===> User: chessmoron |
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| Nov-04-07 | | znprdx: Did I sleep in ‘til Wednesday? Is this a trick? since it is <CG Sunday> why not nonchalantly leave the queen <en prise?> . ....23.e5x[N] d4 24.Bx[Q]c7 Nc3+ 25.b2x[N]c3 b4xc3 seems <insane> enough but after 26.Bf4 with idea of defending with Bc1 and Ka1 against any King Bishop manouver. Seriously folks...23 Nc3+ looks like a slam dunk 24.b2x[N]c3 b4xc3 but 25.Ng3 stops the steamroller. OK before timing out ...23Qa5 24.Nx[B]e6 Nc3+ 25.b2x[N]c3 b4xc3 26.Ka1 Qhh6 but after 27.Rb1 R(f)b8 it is getting fuzzy here after 9-ply my upper limit....since it seems White can readily bring the Queen to c1
So what’s left?...Keep it simple, Simon. A cute touch might be NOT to try open the ‘g’file right away. Qxc6 so that Nb3 can be met with Bf5 but Nx[B]e6 is troubling...AHA! now I see it – it is double sac week after all...23 Nc3+ 24.b2x[N]c3 Bxa2! and the King cannot safely capture it as White heads to zugswang. 25. Ka1 Qa5 26.Nb3 Qa4 with BxN inevitable. 25. Kc1 Qa5 again 26.Nb3 Qa3+ 27.Kd2 a5 followed by Bg7,f5 and the eventual opening of the e-file with an onslought against the vulnerable central king – so many moves ...so little time, unfortunately my flag fell long before move 40 :) Regardless I’m fairly confident that this is about quiet control and total domination in the spirit of Alekhine..... Correcting Bxh7+ to Ba2+ I tried to follow <ConstantImprovement:> but I see I'm not the only one with posting errors....please correct your conclusion... As for Be6 in the actual game - permits Nxe6 perhaps not so good , however I'm certain that there must be a win. |
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Nov-04-07
 | | Jimfromprovidence: Most postings today concur that 23 Nc3+ 24 bxc3 Bxa2+ are the first two best opening moves for black. The four candidate responses are:
25 Kxa2, Kb2, Kc1 or Ka1
Most of the comments posted refer to the moves played in the actual game after 25 Ka1. It was shown that although not played in the match 34… Rc4 conclusively wins for black. But what happens with the other three moves?
I tried to come up with best-forced responses for both players, but I certainly do not know if this indeed is the case.) If 25 Kxa2 (This is a long continuation but I think it is pretty much forced.) then 25… Qa5+ 26 Kb1 bxc3 27 Bc4!? Qa3 28 Qxg6+ Bg7 29 Bxf7+ Rxf7 30 Qb6 Raa7 31 Ne6 Rab7 32 Rd8+ Bf8 33 Rxf8+ Qxf8 34 Nxf8 Rxb6+ 35 Ka2 Rxf8 36 Bxe5 Rb2+ 37 Ka3 Rxc2 should win for black as black is up the exchange. 
click for larger viewIf 25 Kb2 then 25…bxc3+ 26 Ka1 Qc5 27 Nc6 Bd5! 28 Qa4 Bxc6 should win for black. Black is up two pawns. 
click for larger viewIf 25 Kc1 I have no idea how to proceed. Everything I tried turned into a drawn-out match with no clear advantage evident for either player. I need help on this variation. |
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| Nov-04-07 | | znprdx: <Jimfromprovidence:If 25 Kc1 I have no idea how to proceed> Well b4xc3 creates a permanent bind. Nb3 is eventually forced to deal with attack on the b file. With the Be7-a3 manouver as already suggested by <PositionalTactician:> White will have only desperate counterplay - |
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| Nov-04-07 | | stukkenjager: 25.♔c1 is a major improvement for white. Black is still better, but I have to work hard for a win after 25...,♕c3:
I let you know when I find something. |
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| Nov-04-07 | | Fezzik: I'm pretty sure I've seen this game before. I remembered the basic ideas but even with the benefit of having previously seen the game I couldn't figure out how to win. I was on the recieving end of a very similar sac in an important game less than a week ago and in that game my opponent showed the courage to play the sacrifice but missed the quiet winning move in time pressure. I was even luckier than Yudasin in that I won. Congratulations to Makarichev for believing in himself and condolences for not being able to find the winning move. This is still a beautiful game despite the result. |
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| Nov-05-07 | | stukkenjager: I'm happy to report that there is a good line for black after 25.Kc1
Easy no, convincing Yes (I like to think so)
25.♔c1 ♕xc3 (25... bxc3 26.♘b3 ♗g7 27. ♖de1 unclear)
26.♘e2 ♖ab8! 27.f4 exf4 28.♕xf4 ♕b2+ 29.♔d2 ♖fe8 30.♔e1 b3 31.c4 ♖bd8
32. ♕f3 ♗e5! 33.♔f1 ♗xg3 34.♕xg3 ♕a3 35.♔g1 ♕c5+ 36.♕f2 ♖xd3 37.♖xd3 b2 38.♖d1 ♕xc4 39.♘f4 b1=♕ 40.♖xb1 ♗xb1 41.♔h2 ♖e4
winning <Insane indeed> |
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| Nov-05-07 | | stukkenjager: 25.Kc1 Part II
After 25.♔c1 ♕xc3 26.♘e2 ♖ab8 white can also try 27.♗f2 but this doesn't help him either.
(27.♗f2 ♕c7 28.♔d2 b3 29.♕a4 ♖fd8!
(29... bxc2 30.♕xc2 ♕a5+ 31.♕c3 ♖b2+ 32.♔c1 ♕xc3+ 33.♘xc3 ♖xf2)
30.♖c1 ♕d6 31.♔e1 b2!
(31...♗e7 32.♗e3 ♕a3 33.♕xa3 ♗xa3) 32.♕xa2 bxc1=♕+ 33.♘xc1 e4! 34. fxe4 ♖b2 35.♕a5 ♖c8!) <winning once more> |
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| Nov-05-07 | | ongyj: <alphastar>
Thanks. |
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| Nov-05-07 | | patzer2: The solution to yesterday's insanely difficult Sunday puzzle was Black's demolition of pawn structure sacrifice 23...Nc3!!, which set up the follow-up demolition sacrifice 24. bxc3 Bxa2+! Now if I follow the discussion correctly, the notes to the game indicate Black missed a win by not playing 32...Rad8! And <Random Visitor>'s initial suggestion of 34...Rc4! was a second missed winning opportunity. White might have put up some clever resistance with 25. Kc1!?, but <stukkenjager>'s analysis finds a win for Black after 25. Kc1!? Qxc3! 26. Ne2 Rab8! . |
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Nov-05-07
| | Jimfromprovidence: <stukkenjager>
<I'm happy to report that there is a good line for black after 25.Kc1 Easy no, convincing Yes (I like to think so)> <stukkenjager>'s analysis is ingenious, but does it find a win?
After his 23...Nc3+ 24 bxc3 Bxa2+ 25 Kc1 Qxc3 26 Ne2 Rab8!? then what if white plays 27 Rhe1!?. Then 27… Qa3+ 28 Kd2 b3 29 Nc3 Bxc2 30 Rc1 leaves the outcome in doubt, doesn’t it? 
click for larger view |
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| Nov-05-07 | | kevin86: Too bad! Black played brilliantly,but missed out on a win by moving the wrong rook. |
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| Nov-05-07 | | patzer2: <jimfromprovidence> Thanks for the second look at 25. Kc1! Does anyone have an improvement to try and save the win for Black for yesterday's insane 23...Nc3+ puzzle solution? |
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| Nov-05-07 | | stukkenjager: There is no doubt whatsoever in my mind,
<black is winning!> 27.♖he1 poses no problems 25.♔c1 ♕xc3 26.♘e2 ♖ab8! 27.♖he1 ♖fc8! 28.♖f1 ♗g7 29.♕e3 a5 30.♗h2 a4 |
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Nov-05-07
| | Jimfromprovidence: <stukkenjager>
<There is no doubt whatsoever in my mind,
black is winning!>
To <stukkenjager>
I don’t know. After your 27 … Rfc8 it looks like 28 f4 may help white keep alive. |
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| Nov-05-07 | | stukkenjager: alive? there is a clean kill avaiable after 28.f4
25.♔c1 ♕xc3 26. ♘e2 ♖ab8! 27.♖he1 ♖fc8 28.f4 ♕a3+! 29. ♔d2 ♖xc2+!! 30.♗xc2
(30.♔xc2 exf4 31.♖b1 b3+! (30.♔e3? ♖c4!) 30...♖d8+ 31.♗d3 ♗d5! 32.♕xd5 ♖xd5 33.♔e3 b3 <game over> |
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Nov-05-07
| | Jimfromprovidence: <stukkenjager alive? there is a clean kill avaiable after 28.f4> Excellent analysis. Do you mind looking at black's response after 28 Bh2 as well? |
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| Nov-06-07 | | stukkenjager: No I don't mind, I like this game. Makarichev played very well and should have won this game. A sample line after 28.Bh2 goes:
27.♖he1 ♖fc8 28.♗f2 ♕a3+ 29.♔d2 b3 30.c3 b2 31.♗a7 ♖b3!
32.♖g1 ♖d8 33.♔e1 ♖d7! 34.g4 ♗xh4+ 35.♔f1 ♖xd3 36.♕xd3 b1=♕ 37.♖xb1 ♖xb1+ 38.♔g2 ♖xg1+ and the win is there once more.
Thanks for the feedback Jimfromprovidence.
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