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Nov-15-09
 | | bright1: If 38. Bxd4 then Bh6-d2 wins. |
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| Nov-15-09 | | stacase: I might have done 37...exd4 over the board, but the rest probably not. |
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| Nov-15-09 | | Athamas: Black's down 2 pawns, but has a huge positional advantage because of white's vulnerable king and the advanced f-pawn. This one I spotted almost instantly whereas I had trouble on last few days for some reason.
37...exd4
White must move the bishop to stay on the diaganol or lose the queen in 3 moves. Bxd4 Qg2+, Ke1 Qg1+, Qf1 Bd2+ and it's mate if Qxd4 38. Bb4 or Ba5 seems to be irrelevant
38...Be3
This move wins. I actually saw it first as Qg2+ then Be3 but this seems sneakier and more forcing. The threat is of course fxe3 Qg2+, Ke1 f2+ and black wins easily. The other threat is Qg2+ then mating on the first rank. I am sure white resigned here. |
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| Nov-15-09 | | brettls: I thought that 37... Bd2 looked pretty sound, but perhaphs those of you who are more experienced amongst us can refute this? |
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| Nov-15-09 | | Eduardo Leon: The black  and  almost trap the white king. But, if white plays 37... g2+ 38. e1 g1+ 39.f1, so black must either (A) displace the queen from the f1-a6 diagonal or (B) control the e1 square before playing g2+. Now, if the white weren't in the e1-a5 diagonal, black could force white to choose between (A) and (B) with 37... d2. So white's first move is aimed at removing the bishop from that diagonal.<37... exd4!>
So far, so good. If 38.xd4 d2! wins, and if 38.xd4 g2+ wins as well. However, white can choose not to make things easy for white and not remove his bishop from the e1-a5 diagonal. <38.b4/a5 e3!!> This one is the real shocker. Capturing the bishop allows black to promote his f pawn: 39.fxe3 Qg2+ 40.Ke1 f2+. And the threat 39... g2+ 40.e1 g1+ 41.f1 xf2+ can't be countered by any other means. |
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Nov-15-09
 | | Breunor: After an immediate 37 Bd2, White can play 38 B x d2, then on Qg2 ch
39 Ke1 Q b1ch 40 Qf1.
So it is 37 e x d4 first, with Bd2 as the killer threat if white moves off of the a5 - e1 diagonal. |
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Nov-15-09
 | | An Englishman: Good Evening: Partial credit--I think you have to see both of the first two moves for full credit. |
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Nov-15-09
| | An Englishman: Good Evening: PS--I need to clarify my remarks concerning yesterday's puzzle. When I wrote that I had seen both that game and Friday's before, I didn't mean that CG had used them as puzzles before; I only meant that in my meanderings through the website, I had come upon both of the games. My apologies for the inadvertent confusion. |
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| Nov-15-09 | | lippizan: Nice ending by Black. And surprisingly I got it flawlessly, right to where White must resign. I must say though, that OTB I might have offered/accepted a draw at around move 30. |
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Nov-15-09
 | | Jimfromprovidence: 34 gxh4 was the losing move. 34 Qc8 might have salvaged the game.
click for larger viewThis move pins the bishop and threatens Qe6+. I can't find anything obvious at this point for black. |
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| Nov-15-09 | | SufferingBruin: 1000 rating and trying to get better.
Instinctively, I want to play Qg2+ but as the puzzle is “insane”, I should probably give this some more thought. Material: White is up a pawn and looking to chop off another on e5. Minor pieces: Same colored bishops with black cutting along the c1-h6 diagonal. The white bishop is threatening to win a pawn. Space: Black’s queen is active on the g-file that leads to the white king. Additionally, the g2 and e2 squares flanking the white monarch belong to black. The white queen is currently not a threat. Pawn Structure: White has doubled pawns on the h- and d-files. The h-pawns are perhaps not long for this world. The same could be said for the black soldiers on d6 and e5. Black currently has the most advanced pawn (f3). Development: Not all that necessary to get into, I think. Initiative: With the move and the more active pieces, not to mention white’s king is open to attack, I’d say black has the initiative. Candidate moves: Qg2+, Qh3+ and I'd even look at Be3 to see if I could force the mate but times up. I don’t see it.
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Where I often get stumped is on the idea of deflection; deflecting a piece off of a file or diagonal or even a square. I keep looking for the one move instead of the ideas that lead to favorable and winning positions. I love this game. |
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| Nov-15-09 | | iamcoolright: Wow. The first non-Monday puzzle I ever got was yesterday's Saturday puzzle. Now I get a Sunday puzzle? I'm on a roll! |
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| Nov-15-09 | | Formula7: Hmm,37...exd4 and now if 38.Bxd4? then Qg2+ 39.Ke1 Qg1+ 40.Qf1 Bd2+ wins the queen. If 38.Qxd4?? then Qg2+ 39.Ke1 Qg1#. If 38.Be1?? then Qg2#. If 38.Bd2? then Bxd2 and the only way to prevent mate is to give up the queen. If 38.Bb4/a5...now this was the tough part. 38...Be3 and the bishop cannot be taken because of f2+ followed by queening. Black is threatening 39...Qg2+ 40.Ke1 Qg1+ 41.Qf1 Bxf2+ winning the queen, and there's really nothing White can do about it. This must be it. |
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Nov-15-09
 | | dzechiel: Black to move (37...?). White is up two pawns. "Insane." White may have the material, but his king is over exposed to the black forces, as well as trapped in place by the black bishop and the black pawn on f3. At first I looked at the checks on h3 and g2 with the queen, but the white queen will ultimately be able to interpose on f1. Then I looked at the capture of
37...exd4
and was at first scared off by 38 Qxd4 with scary checks and mate threats. But the more you look at that move, the more it appears that white cannot recapture! For instance 38 Qxd4 Qg2+ 39 Ke1 Qg1#; or 38 Bxd4 Qg2+ 39 Ke1 Qg1+ 40 Qf1 Bd2+ and white has to abandon the queen. Not only that, the bishop must continue to protect the e1-a5 diagonal. So where can the bishop go? Not e1 as after 38 Be1 Qg2#. Not d2, as after 38 Bd2 Qg2+ 39 Ke1 Qg1+ 40 Qf1 Bxd2+ and it's even worse than before. No, it's gonna have to be 38 Ba5, or more likely 38 Bb4
and now the hard to find move
38...Be3
The threat now is 39...Qg2+ 40 Ke1 Qxf2#. Black can't run for it with 39 Ke1 as 39...Qg1+ 40 Qf1 Bxf2+ 41 Kd2 Qxf2+ is the end. And taking the bishop with 39 fxe3
invites
39...Qg2+ 40 Ke1 f2+ 41 Kd1 f1=Q+
forcing the exchange of queens and leaving black up a queen for a bishop. A wonderful win by Fedorowicz. Time to check. |
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Nov-15-09
 | | sethoflagos: Most obvious starting point is the forcing line 37... Qg2+ 38. Ke1 Qg1+ 39. Qf1
If black can stop Ke1 or lure WQ off the a6f1 diagonal white's escape disappears. 37...Bd2 would fit the bill if WB wasn't there, so let's try and shift it with the KP. 37 ... exd4
38 Bb4 ... (38. Bxd4 Bd2 39. Qxd2 Qg2+ 40. Ke1 Qg1# or 38. Qxd4 Qg2+ 39. Ke1 Qg1#). But Black should now be able to force pawn promotion. 38 ... Be3
39. fxe3 Qg2+
40. Ke1 f2+
41. Kd1 f1=Q wins Q
Can't see anything else that doesn't lose quickly.
Time to look. |
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| Nov-15-09 | | gofer: 37 ... exd4
38 Qxd4 Qg2+ 39 Ke1 Qg1#
38 Bxd4 Bd2! 39 Qxd2 (otherwise Qg2#) Qg2+ 40 Ke1 Qg1# So the pawn is immune, but now the bishop must move! 38 Be1 Qg2#
38 Ba1 Bd2! mating as above
38 Bb2 Bd2! mating as above
38 Bb4 (probably better than Ba5) Be3 and its game over! 39 fxe3 Qg2+
40 Ke1 f2+
41 Kd1 f1=Q+
42 Qxf1 Qxf1+
43 Kc2 dxe3 winning
The queen must remain along the a6-f1 diagonal to stop mate 39 Qa6 Qg2+
40 Ke1 Qxf2+
41 Kd1 Qg1+
42 Kc2 d3+
43 Qxd3 Qc1+
44 Kb3 f2 winning
39 Bxd6 Qg2+
40 Ke1 Qxf2+
41 Kd1 Qg1+
42 Kc2 Qc1+
43 Kb3 f2 winning
Time to check... |
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| Nov-15-09 | | MindBoggle: @Brettis: 37...Bd2?? is a blunder, as breunis points out, because of 38.Bxd2,Qg2+ 39.Ke1,Qg1+ 40.Qf1 and black is lost. Remember to vacate f1 in your mind's eye when the king leaves. A nice finish, but the difficulty wasn't insane. |
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Nov-15-09
 | | David2009: Sunday's Insane problem P Peelen vs Fedorowicz, 1990 Black 37? Perhaps I am losing my touch, but 37...exd4 seems very strong. 38 Qxd4? allows mate in two, whilst 38 Bxd4?
loses the Queen to 38...Qg2+ 39 Ke1 Qf1+ 40 Qf1 Bd2+. Time to check and see what I have
missed
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I have missed 38 Bb4 by Black, no problem. Off now, will digest comments later. |
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Nov-15-09
 | | lost in space: Too complicate for my small brain. |
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| Nov-15-09 | | sheaf: why is it a sunday puzzle ? clear that black wins the queen by deflection.. Bxd4 Qg2+ followed by Qg1+ and Bd2+ winning the queen otherwise Be3 fxe3 Qg2+ Ke1 f2+ followed by f1=Q winning the queen.. |
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Nov-15-09
 | | RandomVisitor: After 33...h4:
1: Piet Peelen - John Fedorowicz, Wijk aan Zee (Netherlands) 1990
click for larger viewAnalysis by Rybka 3 :
<[-0.12] d=27 34.h3> exd4 35.Bxd4 hxg3 36.fxg3 Qxg3+ 37.Qg2 Qe1+ 38.Kh2 Kf7 39.Qf3 Bh6 40.Kg2 Qd2+ 41.Bf2 Qc2 42.h4 Kf6 43.Kg1 Ke7 44.Bd4 Kf8 45.Bf2 Kg8 06:25:08 1545665kN, tb=31682 |
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| Nov-15-09 | | remolino: Got the first move but not the second, no credit |
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| Nov-15-09 | | cyclon: 37.-exd4 (only so, -Qg2+ is PREMATURE) 38.Bb4 (or Ba5, captures (also) looses.) Be3, and NOW the question is; How to meet this move? It seems that Black has turned the tables and its about the time to check the tie and PARTICULARLY cuff-links. |
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| Nov-15-09 | | cyclon: ... BUT to find this, which this time seemed to be correct vision, took more than an hour from me (to be honest). |
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Nov-15-09
 | | paulalbert: This one didn't seem as insane as usual. Paul Albert |
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