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| Jul-30-10 | | krakukas: Hmm... looks like "catch the queen" puzzle. So: <15...Nxb3+ 16.axb3/cxb3 Re5> and badly placed queen costs White a Bishop at least. 17. Bg5, or what else? It's over anyway. You were at the wrong time in the wrong place, lady. |
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| Jul-30-10 | | gofer: Not sure about this one. Nxb3+ seems safe, but part of me likes Kh8, offering Pf7
for slaughter (Bxf7 Re5 winning the queen) Qxf7 Rf8 Qh5 a4. So now we have weathered
the storm and got to keep Nd4 where we want it and play a4 winning Bb3!, which wasn't
available before.
Okay at least its a theory. It could be completely wrong, but its time to check! |
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| Jul-30-10 | | gofer: I was expecting too much from this position. This was a Tuesday puzzle on a Friday. I saw the queen trap, but missed its execution. "Nil Point". |
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| Jul-30-10 | | C4gambit: hmmm correction... it is not a queen capturing move, at most a bishop capture. Thanks to comments posted by others... (every time i think i got all moves covered, someone brings out a new one i missed)!! |
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| Jul-30-10 | | eblunt: By elimination, quite easy today. Something has to stop the f7 threat, and 15 ...g6 looks awful after 16 ♗xf7+ ! So it has to be ♘xb3, after which 16 .... Re5 simply screams out anyway if only for gaining a tempo activating the rook. Then I noticed I'd conveniently trapped the queen :) |
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| Jul-30-10 | | whiteshark: It took a while, but when I noticed the lack of flight squares for the white queen it was quite easy toget her trapped. <YES!> (5/5)
<azax: Thursday puzzle> Well, today is Friday. Or is it a time zone thingy? |
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| Jul-30-10 | | stacase: I have no idea why this one is a Friday puzzle. The first thing that popped out at me was White's nearly immobilized Queen then I saw Black’s Rook could seal the tomb and then I saw White’s feeble mating attack and then I saw that Black’s Knight could eliminate the supporting Bishop and say check at the same time. And while Black is busy getting out of check back to the Rook and the tomb for Queenie. Hmmmmm does it work? Yes it does. Oh happy day! |
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| Jul-30-10 | | goodevans: Seems I'm not the only one to find this a lot easier than yesterday's puzzle. |
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Jul-30-10
 | | gawain: Does 15...Re5 trap the White queen?
No not quite. Must play 15...Nxb3+ first to prevent Qxf7. Then 16...Re5 is played. That is severe punishment indeed for the wandering Q. |
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| Jul-30-10 | | brutalattack: I guest Nxb3+, then Re5..kill the lonely queen... |
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| Jul-30-10 | | rapidcitychess: Black to play
S Sanchez Castillo vs E Ubiennykh, 2001
15...?
15...Nxb3+ 16.any Re5
Too easy. |
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| Jul-30-10 | | Patriot: Going back a move earlier, I probably would have still played 14...Nxb3+. It only looks slightly safer to me, because there is no prospect of a zwischenzug bishop sac (i.e. 14...Nxh5 15.Bxf7+?) which needs to at least be calculated even though it fails quickly. But it's really a matter of choice since the two moves appear to be equal. 15.axb3/cxb3 Nxh5 16.Qxh5 Re5 amounts to the same thing. What's really funny about the puzzle position is that I most likely would have played 15...Nxb3+ quickly OTB, but because it's a puzzle I stared at the position for a while looking for a "puzzle move" expecting something more difficult. Maybe if this was rated as "Easy" I would have seen 15...Nxb3+ 16.axb3/cxb3 Re5 a lot faster. |
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| Jul-30-10 | | Patriot: Strange...
I plugged move 14... into Fritz and it agrees with me that 14...Nxb3+ and 14...Nxh5 are about equal (  2.98 and 2.84 respectively), but for some other reason. It also agrees with my assessment that the bishop sac is possible: 14...Nxh5 15.Bxf7+ Kxf7 16.Qxh5+ Kg8 17.Bg5 Qd7 18.Rhe1 b4 19.Nd5 and I won't go into that further. I thought 15.Bxf7+ was absurd and concluded the line is losing for white, so the only reasonable reply is 15.Qxh5. As the game continues, that drops a piece anyway: 15...Nxb3+ 16.cxb3 Re5 17.Bg5 Qxg5+ 18.Qxg5 Rxg5. So white may as well nab a pawn with 15.Bxf7+?!, while losing a piece. But against a human player that amounts to accepting the loss. White played it best forcing black to see 16...Re5 at the end. I thought it was a strange puzzle but it seems to be getting stranger by the minute. |
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| Jul-30-10 | | howlwolf: The puzzles seem too easy this week, which may mean watch out tommorow. |
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| Jul-30-10 | | kevin86: Queen trap!! |
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| Jul-30-10 | | YouRang: Got it fairly quick. I saw the white Q+B threat on f7, so I considered 15...g6 -- and while I was considering that, I noticed that the white queen had surprisingly few places to go (unfortunately, it had 16.Qh6). Continuing that thought, I then noticed that the queen would really be helpless if I simply hit it with the rook via ...Re5, except of course that I had to first do something about the threat on f7. The solution thus presented itself:
1. Eliminate the f7 threat with 15...Nxb3+
2. Trap the queen with 16...Re5. |
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| Jul-30-10 | | Marmot PFL: Missed this one. I thought 1st of 15...g6, but 16 Bxf7+ still looks lethal, so i would just defend with 15...Be6, or maybe Nxb3+ first. At that point i might well see 16...Re5, but can't say for sure. |
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Jul-30-10
 | | Jimfromprovidence: Plug 14 Ncd5 into the text if you want a very difficult end-of-the-week puzzle. 
click for larger view Can black still win? |
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| Jul-30-10 | | Patriot: <Jimfromprovidence> "Can black still win?" I would analyze it this way:
1) Black cannot allow 15.Nxf6+ Qxf6 16.Qxf6 gxf6 17.Nd5 2) 14...h6 doesn't look very threatening after 15.Nxf6+ 3) 14...Re5 15.Nxf6+ again.
4) 14...Nxd5 15.Qxd5 Be6 16.Nxe6 fxe6 and black looks better 4) 14...Nxd5 15.Qxd8 Nxb3+ 16.cxb3 Rxd8 17.Nxd5 Rd7 or maybe 17...Ra7 18.Be3 gaining back the bishop pair or perhaps 17...c6 18.Ne7+ followed by 19.Nxc8 and regaining the bishop pair. I don't see an advantage for black. Now I'll see what Fritz says... |
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| Jul-30-10 | | Patriot: <Jimfromprovidence> Now that I've seen what Fritz says...Very clever! That wasn't even on my list of candidates! |
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| Jul-30-10 | | cjgone: I got it, whew I feel smart. It was total luck because I did a queen trapping puzzle a month ago. I couldn't do yesterdays though.. I noticed that the queen couldn't move anywhere because of the bishops and queens line. This meant that if I moved my rook down it would be completely trapped. Unfortunately, the queen can put me in check with the bishop line so I realized that I could take it with my knight and leave white's queen hanging! :D |
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| Jul-30-10 | | David2009: S Sanchez Castillo vs E Ubiennykh, 2001 Black 15...? 15...Nxb3+ 16 axb3 Re5 wins material. 17 Qxe5 dxe5 18 Be3 doesn't work because Bxe3 is check,
which leaves only 17 Bg5 Qxg5+ etc. Time to see what
happened:
=====
Got it. |
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| Jul-30-10 | | rapidcitychess: <Patriot<Very clever!>> What's the move? |
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| Jul-30-10 | | apexin: I noticed that the queen is trapped but i thought only of 15.g6 with similar ideas. |
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Jul-30-10
 | | doubledrooks: <JimfromProvidence> wrote: < Plug 14. Ncd5 into the text if you want a very difficult end-of-the-week puzzle.> How about 14...a4? I didn't examine all lines but one I found was: 15. Nxf6+ Qxf6 16. Qxf6 axb3! 17 Qxd4 bxa2 18. Bc3 ( 18. b3 Bxd4) a1=Q+ 19. Kd2 Qxd1+ 20. Rxd1 Bxd4 21. Bxd4 and black has won the exchange. |
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