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< Earlier Kibitzing · PAGE 1 OF 4 ·
Later Kibitzing> |
Feb-06-11
 | | Anatoly21: The relatively simple 16.Nxd5!! is a truly impressive feat. Either phenomenal calculation or a truly masterful intuition. Personal opinion, though. |
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| Feb-06-11 | | ounos: Oh...mein...Gott....
Breathtaking. |
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| Feb-06-11 | | dcarlisle: too hard for me... what a nice finishing sequence |
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| Feb-06-11 | | azax: Sunday puzzle. White to move. Insane.
I would calculate -- but the job is fairly simple.
16. Bxh7+
The bishop cannot be sidestepped, i.e. :
16. ... Kh8 17. Qh5 Mating.
the rest should be simple calculation:
16. ...Kxh7 17. Qh5+ Kg8 18. Nxd5
Threatening an eventual mate on e7.
18. ...exd5 19. Bh6
I can't wait to sack more material! At this point I realize I'm running dry. Let's try to reverse some moves. 16. Nxd5
Threatening mating tricks based around e7.
16. ...exd5 17. e6
This is what I missed earlier: the discovery on the queen. 17. ...Nde5 18. Rxc6 Bxc6 19. Bxh7+ Kxh7 20. Qh5+ Kg8 21. Bxe5 ... getting nowhere. Let's rewind:
19. e7 Re8 20. Bxh7+ Kxh7 21. Qh5+ Kg8 22. Bxe5 Qb7 23. Bxg7 Black has not the time to capture the bishop: 23. ...Kxg7 24. Qg5+ Kh8 25. Rd4 23. ...f6
Black's last throes.
24. Bxf6
Mating. |
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| Feb-06-11 | | abstract: I found :
16.Nxd5 exd5 17.e6 Nde5 immediately.. I thought of Bxh7+ followed with Qh5+ but didnt have the correct sequence especially the move Bxg7 thats a grandmaster move no doubt.. |
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Feb-06-11
 | | Phony Benoni: Like yesterday, there's a lot of bits and pieces present: the Bxh7+ sacrifice, the e6 push after Nxd5 exd5. Kaidanov throws in an exchange sacrifice and the second bishop as well. For me, the most startling move was 19.e7. If White had tried the immediate 19.Bxh7+ Kxh7 20.Qh5+ Kg8 21.Bxe5: 
click for larger viewBlack has defensive chances after 21...Qe8 22.Bxg7 fxe6. The point of 19.e7 was not to attack the rook or the f8 square, but to take away the e8 square from the queen. Often in these puzzles, I'm willing to speculate on a position after the first few moves, even without calculating everything to the end. In this one, I would have chickened out with something like 16.Qh5; nothing looked good enough to even speculate on. |
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| Feb-06-11 | | Dr. J: This is beautiful, but there are so many side variations! Can we really be certain this is best? E.g., 17...Qd8 18 exd7 Qxd7; or 22...Qb7 (23 Bxg6 f5 24 Bf6 Rxe7). I can refute many other possible defenses, but not all. |
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Feb-06-11
 | | Jimfromprovidence: I'm not getting anywhere after 19...g6?! exf8Q 20 Kxf8.
click for larger view |
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Feb-06-11
| | Phony Benoni: <Dr.J>: <17...Qd8 18.exd7 Qxd7>
click for larger view19.Be4 wins the d-pawn while activating all White's pieces. However, given the game continuation, this may be a better chance for Black. <22...Qb7 23.Bxg6 f5 24.Bf6 Rxe7>: 
click for larger view25.Bxe7 Qxe7 26.Qg6+, winning the bishop on c6 and probably a third pawn soon. This whole thing is just insane. I'm impressed with <dzechiel>'s performance today. |
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| Feb-06-11 | | rilkefan: Looking at 16.Bxh7 Kxh7 17.Qh5+ Kg8 18.Nxd5. If 18...exd5 then e6 with exd7 and Rxd7 to follow with I think a strong attack down the h-file. If 18...Ndxe5 then Rxc6, and 18...Ncxe5 loses to Ne7. Off to see what better defense I missed. |
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| Feb-06-11 | | rilkefan: Hmm, 18.Nxd5 exd5 19.e6 Nf6 and I'm busted. Got a couple of elements, to be very generous. Oh well, there's always next week. |
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Feb-06-11
| | Phony Benoni: <JimfromProvidence suggests 19...g6?! 20.exf8Q Kxf8>
click for larger viewThat looks like another solid defense. White might have to rely on his positional trumps: 2 bishops and better development in an open position, plus Black's weak d-pawn. In that case, then perhaps 16.Nxd5 was a positional sacrifice with tactical fireworks as a nice bonus should Black try to hold material. 21.Qc2 might be an idea for White, attacking the bishop with follow-ups like 22.Qc3 or 22.Qb3. 21.Bxa6 b5 could get complicated when he could just milk this position all day long. |
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Feb-06-11
 | | An Englishman: Good Evening: Does 19.Bxh7+ force a transposition into the game after 19...Kxh7; 20.Qh5+,Kg8; 21.e7? If it does, then I think I can claim full credit. However, if 19...Kh8!?; 20.Qh5,g6; 21.Bxg6+,Kg7 works, then I cannot claim an alternate solution. |
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| Feb-06-11 | | rilkefan: <19...g6 20.exf8Q Kxf8> How about 21.Bh6+ Kg8 (if Ke8 then e4 and f4 etc.) 22.b3 and trying to exploit the black squares? Or better 22.Qc2 23.Qc3 as <Phony Benoni> suggests? Anyway I'd feel uncomfortable as black. |
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Feb-06-11
 | | dzechiel: White to move (16?). Material even. "Insane."
I looked at this for a couple of minutes trying to make ideas like 16 Bxh7+ or 16 Qh5 work, but there was nothing doing there. Finally I took a fresh approach and tried to look for other weaknesses in black's position. That's when I saw the dispute on the b8-h2 diagonal. White would very much like to get the e-pawn moving with a discovered attack on the black queen. It seems the easiest way to bring that about is with 16 Nxd5
Boy, I'll be honest. This gets really messy really fast. If 16...exd5
the
17 e6
on the queen
17...Nde5
and now I'm really unsure how to proceed. There are ideas like 18 Bxh7+ or 18 Rxc6, but I really don't know. Time for me to check. Kudos to anyone who can work this one out. |
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Feb-06-11
| | Phony Benoni: <An Englishman> Good Morning. I fear not. If <19.Bxh7+ Kxh7 20.Qh5+ Kg8 21.e7>
click for larger viewThe fact that White has sacrificed the bishop first means that Black can give the rook back and remain a piece up. One possibility is 21...f6 22.exf8R+ Qxf8, protecting the  e5 while breaking the pin. |
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| Feb-06-11 | | Dr. J: <JimfromProvidence suggests 19...g6?! 20.exf8Q Kxf8> Along the same lines 19...h6 or 19...f6 20hxf8/Q+ Qxf8, avoiding the Black-square weakness. |
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Feb-06-11
| | An Englishman: Good Evening: Drat, then no credit for me, but nice thinking by <Phony Benoni> . |
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Feb-06-11
 | | thegoodanarchist: This may have been in the World Open in Philly. Kaidanov won it in 91 or 92 I cant remember which... |
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| Feb-06-11 | | newzild: I saw the game continuation up to White's 22nd move, but after Black's 23...Q (any), I completely missed 23.Bxg7! I went for 23.Qg5, with the ideas 23...g6 24.Qf6, and 23...f6 24.Bxf6. I must admit that I had some help, because I used to play the King's Indian Attack, which features a similar sacrifice in the line 1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Nf6 6. Bg2 Be7 7. O-O O-O 8. Re1 b5 9. e5 Nd7 10. Nf1 Qc7 11. Qe2 a5 12. Bf4 Ba6 13. Ne3, viz: 
click for larger view...and now, depending on what Black does, 14.Nxd5 is a common trick. When I looked at today's puzzle, the KIA position jumped into my head immediately. There are very few original combinations in chess, as Tal used to say. |
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Feb-06-11
 | | sevenseaman: A dynamic attack. Kaidanov turns up the heat by piece sacrifice 16. Nxe5
click for larger viewThe e pawn advances with tempo and careful R exchange sac ensures pawn advance retains a momentum that lends meaning the B and Q combo later. A well thought out and a pretty determined assault. Black would have done better by returning the R as pointed out by <Phony Benoni> |
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Feb-06-11
| | sevenseaman: Lol! The very game I was working on turns up as today's puzzle. No fun now but I do not think I'd have found this tough solution. |
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| Feb-06-11 | | goodevans: 19 ... g6 20 exf8=Q+ Kxf8 21 e4 seems to keep the pressure on for white. 19 ... g6 is definitely much better than 19 ... Re8. I'm sure if Donaldson had seen the fate that awaited him he'd have chosen to give back the R. |
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| Feb-06-11 | | Old Wolf: This is a truly awesome combination. The classic double bishop sacrifice, opening g- and h-file for the queen and rook to mate -- but with a unique twist: the finesse of having to work in e7!! to cut off the Black Queen from the defence. |
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Feb-06-11
 | | OhioChessFan: By far the easiest week of POTD I've ever had. Another puzzle where the various pieces are readily obvious. Just have to play them in the right sequence. |
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< Earlier Kibitzing · PAGE 1 OF 4 ·
Later Kibitzing> |
sac: 18.Rxc6