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Sep-23-11
 | | andrewjsacks: Study-like resource! |
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| Sep-23-11 | | sfm: Well, if you have seen yesterdays POTD the right move here will probably be the first you think of. Poor Yudovich didn't have that option. |
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| Sep-23-11 | | 310metaltrader: i saw it, but only now realized how it wins to a simple position with white up a piece |
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| Sep-23-11 | | jheiner: 32.White to Play M Yudovich Sr. vs Ragozin, 1937
Material. White is up B for P. White Q and R are forked. The Bb2, Bg2, Pe3 are loose. Black N is hanging, and R and Q are loose. Positional. This is a tactical knife fight. White Q and R are forked. Black threatens mate on g2 if the Q moves of the 2nd rank. The N is pinned to the Q. Black has back rank mate problems. The key to this puzzle is unwrapping the order of threats. Candidates: 32.Nf5!
There may be other candidates, but this one looks best. It interferes with the back rank mate protection on c8. It attacks the Q. It attacks g7. 32...Bxf6?? 33.Qxd8#
32...Rxd2? loses outright 33.Rc8+ Rd8 34.Rxd8# because the N blocks c8. 32...Nxd2 33.Nxg3 and now White is up a B for P and counterplay has evaporated. 32...Qxg2+ 33.Qxg2 Bxg2 34.Rc7 for example, is ugly for Black. Time to check. |
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| Sep-23-11 | | Thumbtack2007: If looking to see if a mate combination is there, 32. Nf5 is one of the first things you check. 32. .. NxQ 33. NxQ eliminates the mate, but leaves White with a one piece advantage which quickly becomes a one piece and two pawn advantage. |
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| Sep-23-11 | | mohannagappan: 32. Nf5 key move |
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Sep-23-11
 | | FSR: Use the horse, Mike!
32.Nf5!
32...Bxf5 33.Qxd8#
32...Rxd2 33.Rc8+ Rd8 34.Rxd8#
32...Nxd2 33.Nxg3 Nf3+ 34.Kh1! 
32...Qxg2+ 33.Qxg2 Bxg2 34.Bxg7+ Kg8 35.Rc7! threatening Nh6# 32...Qg5 33.Bxg7+ Kg8 (33...Qxg7 34.Qxd8+ Qg8 35.Qf6+ Qg7 36.Qxg7#) 34.Qd5+! Rxd5 35.Bxd5# 32...Qb8 33.Qc3 |
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Sep-23-11
 | | al wazir: I got the first move, 32. Nf5, and I think black is forced to trade  s: 32...Qxg2+ 33. Qxg2 Bxg2. But now what? If 34. Bxg7+ Kg8 35. Rc3, then 35...Bd5.I suppose 34. Rc7 is better for white, but I don't see the win. |
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| Sep-23-11 | | ounos: Nice. I was staring for a minute, confused that all moves apparently lose quickly; then noticing that Nf5 disconnected Bh3 from c8, the absolutely critical key - smooth sailing after that. |
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Sep-23-11
| | al wazir: OK, I've read <FSR>'s post. Now I see the win. |
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Sep-23-11
 | | Jimfromprovidence: I saw the winning move all right, but did I not see the 32...Qg5 defense as posted by <FSR>. This leads to a brilliant finish beginning (after 32 Nf5 Qg5) with 33 Qxd8+! 
click for larger viewThis forces 33...Qxd8 in response, but now the piece de resistance comes along with the stunning 34 Rc8!! 
click for larger viewThe threat if 34...Qxc8 is forced mate in three moves beginning with 35 Bxg7+. The queen and the game are lost. (Rybka freeware assisted) |
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| Sep-23-11 | | abuzic: Already white is a piece up and has the pair of Bs; black is attacking the white K, and has 2 connected g and h pawns. 32.Nf5! creates many threats and should win the game: -32...Qg5 33.Qxd8+ Qxd8 34.Rc8! Qxc8 35.Bxg7+ Kg8 36.Bd5+ Qe6 37.Bxe6#; -32...Re8 33.Bxg7+ Qxg7 <(33...Kg8 34.Qd5+ Re6 35.Qxe6#)> 34.Nxg7 Nxd2 35.Nxe8; -32...Nxd2 33.Nxg3 and white can play Rd7 late with a winning position; -32...Qxg2 33.Qxg2 Bxg2 34.Bxg7+ Kg8 35.Rc7 (threatening Nh6#), now if -35...h6 36.Bf6 wins;
-35...h5 36.Kxg2 wins;
-35...Rd1+ 36.Kxg2 wins; |
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Sep-23-11
 | | Shams: <FSR> 32...Nxd2 33.Nxg3 Nf3+ and here you're giving 34.Kh1+! but surely we're just taking on f3? |
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Sep-23-11
| | FSR: <JimfromProvidence> Very elegant! I thought of 34.Rc8!! in your line, but only with the follow-up 34...Qxc8 35.Bxg7+ Kg8 36.Ne7+?? <Shams> Quite so. I had a brain fart. :-) |
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| Sep-23-11 | | rilkefan: Saw Nf5 quickly, including the idea of Rc8/Bxg7/Ne7+ if necessary, but didn't notice ...Qg5 as a defense. Or various other defenses either. As long as the "this is a puzzle position for you" light comes on when I play, I'll be ok. |
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Sep-23-11
| | FSR: <rilkefan: ... As long as the "this is a puzzle position for you" light comes on when I play, I'll be ok.> That would be a great feature, wouldn't it? It would be even better if one were advised, "This is a Monday puzzle position" or "This is a Thursday puzzle position," etc. |
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| Sep-23-11 | | rilkefan: <It would be even better> Ok, so it should follow Roy G. Biv. |
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| Sep-23-11 | | abuzic: <FSR: Use the horse, Mike!
32.Nf5!
32...Bxf5 33.Qxd8#
32...Rxd2 33.Rc8+ Rd8 34.Rxd8#
32...Nxd2 33.Nxg3 Nf3+ 34.Kh1!
32...Qxg2+ 33.Qxg2 Bxg2 34.Bxg7+ Kg8 35.Rc7! threatening Nh6# 32...Qg5 33.Bxg7+ Kg8 (33...Qxg7 34.Qxd8+ Qg8 35.Qf6+ Qg7 36.Qxg7#) 34.Qd5+! Rxd5 35.Bxd5#> Is 35.Bxd5# legal in this line? |
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Sep-23-11
 | | scormus: Wow, what a position, I wouldnt want to have this one in time pressure. So many threats and pieces attacked, directly or indirectly. You name it, its threatened. A lot of variations that look promising but do not work out, so I concentrate on what I think is the main line 32 Nf5 seems to be the only way, W must leave the Q double attacked. If ... Rxd2 33 Rc8+ wins. If ... Nxd3 33 Nxg3 and W will end up a piece ahead (I think) If ... Qxg2 33 Qxg2 Bxg2 34 Rc7 So 32 ... Qg5 and everything seems covered. 33 Bxg7+ doesnt work here and the Rd8 is defended. But 33 Qxd8+ Qxd8 34 Bxg7+ Kg8 35 Rc8 Qxc8 36 Bd5+ Qe6 37 Bxe6# Now check. If its right I redeem myself for yesterday |
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Sep-23-11
| | scormus: <Jim> Ah yes, Rc8 before Bxg7+. Maybe it ends up the same but a bit cleaner |
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| Sep-23-11 | | chessworm: <abuzic> Its illegal! But for the actual continuation of 32.. g5 defense, see Jim's analysis. If somebody has foreseen entire Qg5 line with Q and R sacrifices, then only he can claim to have gotten the puzzle imo.. Its simply beautiful! |
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Sep-23-11
 | | An Englishman: Good Evening: Amazing resource, and if White was in time trouble, I can't blame him for missing it. With so many piece en prise simultaneously, it can be hard to trust your eyes when you see the move. |
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| Sep-23-11 | | gofer: Another back rank mate position, but in this case black is currently covering all threats and
has one of its own. The main thing to see is that white is currently a minor piece up, so if
lots gets exchanged then when the dust settles black may still be a bishop down! <32 Nf5 ...>
This move does lots of things;
a) it blocks Bh3's protection against Rc8 mating
b) it attacks queen g3 and most importantly
c) it opens the d file for the white to play Qxd8#,
but it also has one final trick
d) it opens up the a1-h8 diagonal and attacks Pg7!
32 ... Rxd2 33 Rc8+ Rd8 34 Rxd8#
32 ... Nxc2 33 Nxg3 winning
32 ... Bxf5/Bxg2 33 Qxd8#
<32 ... Qxg2>
<33 Qxg2 Bxg2>
<34 Rc7! ...>
click for larger viewBlack for an instant is whole pawn ahead, but its all a myth... White is threatening Kxg2 winning and Bxg7 Kg8 Nh6#. I am struggling to see a defense for black. 35 ... Kg8 36 Bxg7 h5 37 Kxg2 winning
35 ... h5 36 Bxg7 Kg8 37 Kxg2 winning
Time to check... |
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Sep-23-11
 | | dzechiel: White to move (32?). White has a bishop for a pawn. "Difficult." So much going on! White's queen and rook are forked. Black threatens mate should the white queen stray from protecting g2. And black's king could be subject to a back rank mate. White can't play 32 Nxb3 Rxd2 33 Rc8+, as the black bishop is covering that square. But, it sure feels like a knight move, doesn't it? I've been mostly looking at 32 Nf5
as my candidate. This threatens 33 Nxg3 as well as 33 Qxd8#. It also has the nice side effect of blocking the bishop's protection of c8. 32...Qg5
Of course on 32...Rxd2 33 Rc8+ Rd8 34 Rxd8# is mate. And 32...Nxd2 is met with 33 Nxg3 when white remains a piece up. Oh! Oh! Now I see the pretty ending!
33 Qxd8+ Qxd8 34 Rc8
Pinning the queen.
34...Qxc8
What else was black to do? Could play 34...Qg8 35 Rxg8+ Kxg8 36 Bxh3 and white is up two bishops. 35 Bxg7+ Kg8 36 Bd5+ Qe6 37 Bxe6#
This has to be it. Time to check.
=====
Goodness! White overlooked a killer. Too bad. |
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Sep-23-11
 | | lost in space: With my limited time I was not able to find 23. Nf5. What a resource! |
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