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Aug-18-12
 | | bright1: Over at Chessbase.com they analyzed this game and actually found an amazing drawing resource for Black with 28. ... Nf3+ 29. Bxf3 Qxf3 and if now 30. dxe6 Rd2 31. Rf1 Rxf2 32. Rxf2 Rd1+ and mate will follow. So instead 30. Re1-e3 Qd1+ 31. Re1 Qf3 = |
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| May-15-13 | | Patriot: 31.Qe7 is the best I could come up with. 31.Bf6 doesn't seem as convincing to me. 31.Qe7
31...Rxd5 32.Qe8+ and 33.Qh8#
31...Rf8 32.Qf6 
31...Nxh3+ 32.Kf1
31...Nf3+ 32.Bxf3
31...Rc8 32.Qe8+ Rxe8 33.Rxe8+ Kh7 34.Rh8#
I don't see anything else. |
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| May-15-13 | | Ken MacGillivray: I'm with you Patriot 31.Qe7 |
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| May-15-13 | | Patriot: Hmm...31.Qe7 Nxh3+ 32.Kf1? Qxd5 wins for black. 31.Qd6 is something I never considered here. |
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| May-15-13 | | JCRchess: bright1 ... this may very well be, but White isn't forced to play 31.) Rf1? 31.) exf7+ will give Black problems. |
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| May-15-13 | | M.Hassan: "Medium/Easy"
White to play 31.?
White has a Bishop for a pawn.
White needs to divert the Rook on d8:
31.Qd6!
<if...Rxd6 32.Re8+ Kh7 33.Rh8#> 31..........Nxh3+
32.Kf1 Qxf5
33.Qxf5
Rook can not take White Queen for the reason mentioned above 33..........Rf8
34.Qe5 f6
35.Bxf6+ Rxf6
36.Re8+ Kh7
37.Qg8# |
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| May-15-13 | | SuperPatzer77: <M.Hassan:: 31..........Nxh3+
32.Kf1 Qxf5
33.Qxf5
Rook can not take White Queen for the reason mentioned above >Correct one is 32...Qxd5 - NOT Qxf5.
SuperPatzer77 |
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| May-15-13 | | SamAtoms1980: Yep....
Right piece, right direction, one square too far. I missed 32....Qxd5. |
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| May-15-13 | | thegoldenband: For whatever reason, I saw 31. Qd6 in about three seconds! |
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| May-15-13 | | agb2002: White has the bishop pair for one knight and one pawn. Black threatens 31... Rxd5, 31... Nxh3+, 31... Qxh3, 31... f3, etc. The black rook protects Black's back rank and it is defenseless. This suggests 31.Qd6, with the double threat 32.Qxd8+ and 32.Qf6: A) 31... Rxd6 32.Re8+ Kh7 33.Rh8#.
B) 31... Ne6 32.Qxd8+ Nxd8 33.Re8+ Kh7 34.Rh8#.
C) 31... Nxh3+ 32.Kf1
C.1) 32... Qxd5 33.Qxd5 + - [Q+B vs N+2P] (33... Rxd5 34.Re8+, etc.). C.2) 32... Qg5 33.Bf6 + - (33... Rxd6 34.Re8+; 33... Qxd5 34.Qxd5 Rxd5 35.Re8+). D) 31... Nf3+ 32.Bxf3 Qg5 33.Bf6, etc.
E) 31... Rc8 32.Qf6 and mate soon.
F) 31... Rf8 32.Qf6, etc.
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The alternative 31.Qe7 is probably simpler:
A) 31... Rxd5 32.Qe8+, etc.
B) 31... Rc8 32.Qe8+ Rxe8 33.Rxe8+, etc.
C) 31... Nxh3+ 32.Kf1 Qxd5 (or 32... Qg5 33.Qxf7#) 33.Qe8+, etc. D) 31... Nf3+ 32.Bxf3 Qg5 33.Qe8+, etc.
E) 31... Rf8 32.Qf6, etc.
There's no need to risk anything so I would play 31.Qe7. |
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| May-15-13 | | Jausch46: To Patriot: Qe7 is just as good. White does not lose on Your suggested line 31. ...Nh3+ 32. Kf1, Qxd5, because white can take the black Qeen. 33. QxQ, RxQ, 34. Re8, Kh7 35. Rh8 #. Even 33. Re8+, RxR would work, after QxQ, but slower. Best regards! |
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| May-15-13 | | SuperPatzer77: <Patriot> 31. Qd6! is much better than 31. Qe7? because 31...Nxh3+, 32. Kf1 Qxd5, 33. Qxd5! If 31. Qe7?, 31...Nxh3+!, 32. Kf1 Qxd5!, 33. Qe8+ Kh7!!! (not 33...Rxe8???, 34. Rxe8+ mates next) and White cannot mate Black with Qh8 because of Rxh8  SuperPatzer77 |
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| May-15-13 | | agb2002: <Patriot: Hmm...31.Qe7 Nxh3+ 32.Kf1? Qxd5 wins for black. 31.Qd6 is something I never considered here.> And I missed in my line C for 31.Qe7 the obvious 33... Kh7. Curious. |
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| May-15-13 | | SuperPatzer77: <agb2002, jausch46, and Jay MacGillivray> 31. Qe7 is a bad move because 31...Nxh3+!, 32. Kf1 Qxd5!, 33. Qe8+ Kh7!!!! (You all overlook that move). White cannot mate Black with 34. Qh8 because the Black Rook defends the h8 square. Black's winning, indeed. SuperPatzer77 |
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| May-15-13 | | diagonalley: <various folks> yep, i went Q-K7 too ... which fails (just) DRAT |
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| May-15-13 | | Dr. Funkenstein: what about
31. Qe7 Nxh3+ 32. Kf1 Qxd5 33. Qf6
33. ... Qh1+ 34. Ke2 leaves d8 and g7/h8 attacked |
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| May-15-13 | | SuperPatzer77: <Dr. Funkenstein: what about 31. Qe7 Nxh3+ 32. Kf1 Qxd5 33. Qf6 33. ... Qh1+ 34. Ke2 leaves d8 and g7/h8 attacked> 34. Ke2 f3+!!, 35. Ke3 (only move) Qxe1+, 36. Kxf3 Qxf2+, 37. Kg4 Qxf6 (stopping Qg7#), 38. Bxf6 Rd6,39. Be7 Rd7 (Black Knight then escapes to g5 and Black wins!!!) SuperPatzer77 |
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| May-15-13 | | Yogi Darwin: I am glad to learn that I was not the only one with Qe7. Never even considered Qd6. Good puzzle! |
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| May-15-13 | | abuzic: <SuperPatzer77: <Dr. Funkenstein: what about 31. Qe7 Nxh3+ 32. Kf1 Qxd5 33. Qf6 ... Qh1+ Ke2 leaves d8 and g7/h8 attacked>
34. Ke2 f3+.....)>
or mate after 34...Ng1+ 35.Rxg1 <35.Kf1 Nf3+ 36.Ke2 Rd2#> 35...Qe4+ 36.Kf1 Rd1# |
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| May-15-13 | | abuzic: 31.Qd6 (threat Qxd8+, Qf6 and Bxf7+; if the R takes the Q: Re8+ and Rh8#)
31...Nf3+ 32.Bxf3 Qg5 33.h4
31...Nh3+ 32.Kf1 Qg5 33.Bxf7+ Kxf7 <33...Kh7 34.Bxg6+ Qxg6 <(34...Kg8 35.Qe6+)> 35.Re7+> 34.Qc7+ 31...Rc8 32.Qf6
31.Qe7 is bad compared to 31.Qd6, but not losing after 31...Nxh3+ 32.Kg2 Qxd5+ 33.Kxh3. Same idea would arise on move 30. after 30.Qe7! except the the Bs are still on the board, and if 30...f6 31.Bxd5+
click for larger view |
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| May-15-13 | | PhilFeeley: I think I only looked at Qe7 briefly and rejected it as inadequate. Then I saw Qd6 and stopped as it was more obviously winning. |
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| May-15-13 | | Nick46: <Patriot: Hmm... 31.Qd6 is something I never considered here.> Extraordinary honesty for one of the stars of this forum; I dips me lid. Indeed, one doesn't expect a queensac on a Wednesday. |
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| May-15-13 | | Jausch46: I can see now that 31. Qe7 is not as good than Qd6, nevertheless it is not loosing; abusic's argument is convincing, thanks a lot for this enlightened discussion. |
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| May-15-13 | | cocker: As pointed out earlier by <bright1>, Black missed chance of draw with 28 ... ♘f3+. |
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| May-15-13 | | Abdel Irada: <<•> (Back) rank has its privileges <•>> White begins the fun with a queen offer backed by a mate threat on the back rank. Note that I don't call this a queen *sacrifice*. That is because Black can't even consider accepting, and this makes the offer itself a "stock" pseudo-sacrifice in such positions; watch for ones like it (or the threat of them) in your own games and those of others to see how common they really are. <<•> 31. Qd6! ... > Taking is not an option: (a) 31. ...Rxd6? 32. Re8†, Kh7 33. Rh8#. Technically, this isn't a back-rank mate, but it is one that requires control of the eighth rank, so it falls into the same thematic category. Black can, of course, make a check of his own.
<<•> 31. ...Nxh3† 32. Kf1 ... >
But since the check has no follow-up, Black is confronted afresh by his dilemma: how to avoid the mate pattern described above. Black has three options.
<<•> (1) 32. ...Rf8 > Not playable here is (b) 32. ... Qxd5? 33. Qxd5, Rxd5 33. Re8†, Kh7 34. Rh8#. <<•> 33. Qf6 > Black can't stop the mate threats.
< (2) 32. ...Rc8
33. Bxf7†, Kh7
34. Qf6 >
As before, Black can't hold off the mate threats. And 33. ...Kxf7 34. Qf6†, Kg8 35. Qg7# is no better. < (3) 32. ...Qg5
33. Bf6 >
Black still can't take on d6 or d5, and any other move cedes decisive material. •Takeaway: If you can offer your queen on penalty of mate and in the process create threats or win material, never fear to do so. A defense that can't be played is no defense at all. ∞ |
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