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Later Kibitzing> |
Dec-29-10
 | | Domdaniel: <estrick>: in the <Grasser> game, Black's ...Rb8 was a mistake. A Queen check on g3 picks it off. |
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| Dec-29-10 | | lost in space: <<patzer2>: <lost in space> After 17. Bxh7+Kxh7 18. Qh5+ Kg8 19. Bxg7 Kxg7 20. Rf3 Bxc5+!, White might still win after 21. Qxc5! But it's a long and hard win.
Quicker and easier here is 20. Qg4+! Kh7 21. Rf3!> <<Eyal>This is more than just a tactical "fluke" - as long as the black king is on g7 rather than on the h-file, it stands to reason that it would have more possibilities of escape (especially since, as White sacrifices quite a lot of material - in this game, no less than 3 pieces - Black can afford to give some back)> You are both so right. No blossoms for me today. I will take the idea of 20. Qg4 in my "arsenal" for positions like this. Thanks! |
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| Dec-29-10 | | Dr. J: My computer allowed me to execute the double-bishop sacrifice against it, as follows, but I'm doubtful it would stand up to analysis: 1 e4 e6 2 nf3 nf6 3 nc3 d5 4 bd3 dxe4 5 nxe4 be7 6 0-0 0-0 7 nxf6 bf6 8 be4 be7 9 d4 nd7 10 bf4 nf6 11 bd3 c5 12 rfe1 qb6 13 b3 cxd4 14 nxd4 nd5 15 be5 bb4 16 bxh7+ kxh7 17 qh5+ kg8 18 bxg7 Kxg7 <?? f6> 19 qg5+ kh8 20 re4 nf4 21 rxf4 qd4 22 rxd4 f6 23 rh4# |
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Dec-29-10
 | | An Englishman: Good Evening: Wasn't there another Puzzle of the Day almost exactly like this where the solution *wasn't* the Double Bishop Sacrifice? You know, one of those tricky positions CG sometimes foists on us? |
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| Dec-29-10 | | VincentL: <estrick>If we do that, then we have
19. Bxg7. Kxg7 20. Qg4+ Kh7 21. Rf3 Qd8 22. Rh3+ Bh4 23. Rxh4+ Qxh4 24. Qxh4+ Kg7 25. cxb6 and now white has Q + P for R + B; should be sufficient to win, but only with best technique. |
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| Dec-29-10 | | WhiteRook48: the double bishop sac works for this game |
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| Dec-29-10 | | kevin86: Easy:the position yells for a two bishop sac. If both are captured,the rook and queen will surely mate. If the bishop(s) are not taken,they have the lethal quality of a cobra. |
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| Dec-29-10 | | kevin86: BTW,if you cross a few tricerotops with the winner of this game,you will get :Three point Bosquets. |
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| Dec-29-10 | | Patriot: Black is up a piece and a pawn. The black knight is hanging, but with both bishops aiming at the kingside and the queen ready to swiftly move there and a possible rook-lift to f3, it looks more like a kingside attack. I spent a moment looking at simple moves like Qg4 and Qh5 but they seem defensible. Therefore, 17.Bxh7+ seemed to be in order. 17...Kxh7 18.Qh5+ Kg8 19.Bxg7 utterly demolishing the king's protective shield. I looked very closely for some defensive idea by black because white has a lot of material invested in this king hunt. The best thing I could come up with is 19...f6 which is similar to the game line 19...f5. All I could think about was getting another piece in the attack with 20.Rf3. I didn't consider the strong 20.Qg6, ending the game quickly. Also, I missed another stronger and more decisive line after 19.Bxg7 Kxg7. Again I wanted to play 20.Rf3 but much better is 20.Qg4+ followed by 21.Rf3. I was still convinced white is winning but not completely comfortable with the attack. Missing some key ideas made it seem more difficult. |
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| Dec-29-10 | | QueenMe: I believe black's position is, in fact, so awful that 19. Rf3 also wins. If black does, in fact, have any defense for it, it will take two moves to effect any get-away for his king. And then the real beauty of it is that, after black begins to prepare for his king's exodus, white can next take the knight at b6, and that's when the real mental torment for his opponent culminates - because he'll realize that, to save his king, he must simply abandon his queen and continue his getaway preparations. So I got 18. Bxh3+, yet I continued (and hereby plant my flag with) 19. Rf3 also being an equially viable forced-win move that will effect resignation in two moves or less. |
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| Dec-29-10 | | Eyal: <QueenMe: I believe black's position is, in fact, so awful that 19. Rf3 also wins [...] I continued (and hereby plant my flag with) 19. Rf3 also being an equially viable forced-win move that will effect resignation in two moves or less.> No, in fact 19.Rf3? loses to 19...f6! which both creates a flight square for the king and prevents Bxg7. E.g., 20.cxb6 (otherwise the knight will rejoin the game via d5) Qd6! to be followed by Qd5 if White defends the bishop, and White hasn't really got anything substantial for the piece. |
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| Dec-29-10 | | M.Hassan: <Morten:The black pawn on d7> Thanks <dzechiel>: Appologise for mistake |
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Dec-29-10
 | | doubledrooks: I mistakenly went for 19. Rf3, which I now realize loses after 19...f6 20. Qg6 Nd5 21. Rg3 Rf7 22. Rh3 Bd8, giving the king an escape square on e7. |
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| Dec-29-10 | | jackpawn: This was much easier for me than the problem from yesterday. The only move that took a few seconds to find was 20. Qg4+. |
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| Dec-29-10 | | skemup: some of variations
bxh7+ Kh8
Bxg7+ Kxh7 (or Kxg7)*
Qh5+ Kxg7(Kg8 Qh8#)
Qg4+ K hfile (Kf6 Qg5#)
Rf3 Qd8
Rh3+
and 2B+R for 2p+B+Q+K
*Kxg7
Qg4+ Kh8
Rf3 Bf6
Rh3 Bg7
Bf5 Kg8
Rh8 and Qh5 with mate |
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| Dec-29-10 | | BOSTER: This game with artistic double bishop sacr. in finale is another proof that Sicilian is very sharp ,and you have to play it very precisely.
In my opinion (without computer) black made a few small mistakes in this game.
Move 10. Being afraid of that bishop b4 can be cut (c5,a3,b4) black played Bd6,but better to play Be7 ,because after obvious threat e5 or c5 black lost the tempo.
Move 12...bxc6,according to rules-take to the center, but maybe better dxc6 to give more space for bishop on c8 and queen. (Qxc6 it is very interesting too).
Move 13...Nf6,but maybe better was f5 and return the pawn back.
Move 15...Nd5 is blunder, better Ne8 with ,if possible , to push f5 and d6, to support black camp by the queen. |
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Dec-29-10
 | | Penguincw: I would've played 17.cxb6 first . 
click for larger view |
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| Dec-29-10 | | King.Arthur.Brazil: I'll not take more time than say that my coment would repeat of the "patriot".
With difference that I didn't look upon f5 or f6, I only see Kxg7 Qg4+ and Tf3, and for me, this was enough to play, since the puzzle is 2 stars only... |
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| Dec-29-10 | | wals: 17.Bxh7+ was the way to go. followed by,
17...Kxh7 18.Qh5+ Kg8 19.Bxg7 Kxg7
20.Qg4+ Kh7 21.Rf3 Qd8 22.Rh3+ Bh4
23.Rxh4+ Qxh4 24.Qxh4+ Kg7
25.Qg3+ Kh8 (best available)
leading to:-
1.  (#7): 26.Rf1 Rg8 27.Qh4+[] Kg7 28.Rf3[] f6 29.Rg3+[] Kf7 30.Qh7+ Rg7 31.Rxg7+ Kf8 32.Rg8# 2. (#11): 26.Rd1 f5 27.cxb6 Rf7 28.Qg6 Rg7 29.Qh5+ Rh7 30.Qe8+[] Kg7 31.Rd3[] Rh4 32.Qe7+[] Kg8 33.Qxh4 Kf7 34.Qh7+ Kf6 35.Rg3 d5 36.Rg6# |
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| Dec-29-10 | | gofer: There is a lot going on here; we have
a) the obvious pick up a piece and gain a passed pawn (which is probably going no where)
b) the blatantly obvious attack on g7 and h7 via Qh5 or Qg4
c) the rather less obvious attack on Qc7, by playing Be5
d) the dangerous bishop sacrifices on g7 and h7
Lots of choices and may be others; Qc2, f5, Rf3, Rc1 So what's best???
Well after closer inspection the bishop sacs have it... 17 Bxh7 Kxh7 (Kh8 Qh5 mating)
18 Qh5+ Kg8
19 Bxg7 ...
19 ... Kxg7
20 Qg4+ Kh8/Kh7/Kh6
21 Rf3 mating
19 ... f6/f5
20 Qg6 Rf7
21 Bh6+ Kh8
22 Qxf7 mating
Time to check... |
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Dec-29-10
 | | Phony Benoni: Gosh, it helps to know the classics. And I don't mean Lasker - Bauer. Take a look at this position:
click for larger viewDoes this look familiar? It's from G Kuzmin vs Sveshnikov, 1973, after a few transpositions compared to this game. The continuation was the same, except that Sveshnikov took the second bishop and resigned after 19...Kxg7 20.Qg4+ Kh7 21.Rf3. |
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| Dec-29-10 | | Eyal: <Phony Benoni: Gosh, it helps to know the classics. And I don't mean Lasker - Bauer. Take a look at this position:
click for larger viewDoes this look familiar? It's from G Kuzmin vs Sveshnikov, 1973, after a few transpositions compared to this game.> Nice find - and some of the kibitzing there looks quite familiar as well... <Jan-19-09 An Englishman: Good Evening: I've seen this before; was this one of those trick Puzzles of the Day where you think 16.Bxh7+ is the winning move, but it isn't?> <Dec-29-10 An Englishman: Good Evening: Wasn't there another Puzzle of the Day almost exactly like this where the solution *wasn't* the Double Bishop Sacrifice? You know, one of those tricky positions CG sometimes foists on us?> Good evening. Tonight on "It's the Mind", we examine the phenomenon of deja vu. That strange feeling we sometimes get that we've lived through something before, that what is happening now has already happened. Tonight on "It's the Mind" we examine the phenomenon of deja vu, that strange feeling we sometimes get that we've ... Anyway, tonight on "It's the Mind" we examine the phenomenon of deja vu, that strange... |
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| Dec-30-10 | | grasser: <ESTRICK> The Rook at b8 is hanging. |
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Dec-30-10
| | Phony Benoni: So do we play 17.cxb6 or 17.Bxh7+?
Hmmm. I think I know.
Time to check. |
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| Dec-31-10 | | turbo231: I couldn't see a clear cut victory so I went to the website offered up by David2009 and played Hundini1.03 against I suppose Crafty there. I set the level at 20/25 and Houdini used nearly all that 25 minutes lacking only 19 seconds. Finally after 21 moves Houdini wins, hell of a Wednesday's puzzle, all you have to do is think 21 moves in advance. Wait a minute, Fischer said he could think of 16 moves in advance, so a person would have to be better than Fischer to solve this puzzle up in here. |
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Later Kibitzing> |
Kibitzing
sac: 16.Nb6