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Donovan vs C Howell
Hove (1997), ?
Sicilian Defense: Nezhmetdinov-Rossolimo Attack (B30)  ·  1-0



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sac: 22.Be7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jan-06-13  jvasea1990: Houdini 3 Pro w32
#15 (depth 24) 22.Be7 Qxa1+ 23.Kf2 Bg7 24.Bf6 Qc1 25.Bxg7+ Kg8 26.Bh6+ Rg7 27.Rxg7+ Kf8 28.cxd4 a5 29.Rxf7+ Ke8 30.Rg7 Qd2 31.Qxd2 Bd7 32.Rxd7 Rd8 33.Rxd8+ Kxd8 34.Qc3 a4 35.Bg5+ Ke8

#28 (depth 24) 22.Nxf7+ Rxf7 23.Qxh5+ Rh7 24.Qg6 Bg7 25.f5 Qxa3 26.Rxa3 Bd7 27.f6 e5 28.fxg7+ Kg8 29.Qd6 Rxg7 30.Rxg7+ Kxg7 31.Qxd7+ Kh6 32.Qd6+ Kg5 33.Qxe5+ Kg6 34.Qe4+ Kh5 35.Qxb7 Rf8

3.47 (depth 23) 22.Bb2 Qe8 23.cxd4 h4 24.Rg5 Bg7 25.d5 f6 26.Rxg7 Rxg7 27.Ng4 Qh5 28.Bxf6 Qxd5 29.Re1 h3 30.Ne3 Qc5 31.Qg4 Qf8 32.Bxg7+ Qxg7 33.Qxh3+ Kg8 34.Nf5 Qf6 35.Re5 a5)

Jan-06-13  Marmot PFL: Most of white's pieces are well placed for attack, black's king position is weak, and the QR is out of play. However white does not seem to have enough force in the king's area at present to win the game. For instance 22 Nxf7+ Rxf7 23 Qxh5+ Rh7 fails as Qe8+ is covered by the BQ.

So we need to divert the queen, can we use the rook as bait? 22 Be7 Qxa1+ 23 Kf2 Bxe7 and now 24 Nxe7+ etc does work. So, black cannot capture on e7, but can block the g-file with 22...Bg7 (22...Bh6 23 Bf6+).

Now we have a new puzzle, white to play and win (a rook down now). 23 Nxf7+ Kg8 might let black out, so 23 Bf6, threatening 24 Rxg7 Rxg7 25 Qxh5+ Kg8 26 Bxg7 Kxg7 27 Qxf7+ Kh8 28 Ng6#.

To this I do not see a good defense (missed 23...Qc1, which while better than resigning is still hopeless.)

Jan-06-13  snakebyt: I got too excited about discovering Be7 and worried about NXf7+ so I didn't counter with 22. ...QXa1+. My path to win if Black Queen doesn't take Rook and check is 22. Be7-BXe7 23. NXf7 RXN 24. Qe5 Kh7 25. QXh5# But I may have missed something...?
Premium Chessgames Member
  chrisowen: Oh well I got re ar 22.be7 huckle burys qua4 though also ok to 22.Nxf7 eg in slow time both come to fruition in ie back bishop, it ok in see being qua4xa1 castle main prioority re rubber-neck divert i call a1+ in the gods upright ellucidate in affable go be 23.Kf2 dessert as oh scar the plug scourge off re you 23...bg7 i net re cord 24.bf6 dont fade away sh I valiant it black in all sorts of terrific whipped into shape a king hunt abound after c1?
Premium Chessgames Member
  chrisowen: In footing the bill white also gable go ie 22.Nxf7+ at facade forgo st in e7 and plough in rook racing post queen mellow in e2 h5 22.Nxf7+ in good game see oaf able apostle go in f8 later under milking him clop rookxf7 knight forsooth in fat e2xh5+ now ledge in bar 23...rh7 net he locket enough ogle claw 24.Qg6 tooth in gestate fat back bone 24...bg7 picking as first 25.bf8 in rye call it no Be7 art in sac or nxf7 low tree culling aint it dont get your nicker a4 a1 lament it another me f7 in a twist e7 as ping?
Jan-06-13  dx9293: I had Mlaja/beatgiant's line:

22.Nxf7+! Rxf7 23.Qxh5+ Rh7 24.Qg6 Bg7 25.Bf8!!

(A) 25...Qxa1+? 26.Kf2 with 27.Bxg7(+) and a quick mate to follow.

(B) 25...Qd7! 26.f5! exf5 27.Re1, for example 27...b5 28.Re8 Bb7 29.Bxg7 mate.

Jan-06-13  5hrsolver: Did not get this. However I think I found a line that wins too. The thing is that after finding the line below I went back and tried to find a better line (Lasker's Maxim). The line played in the game is better, simpler and more forceful. My lesson learned today is that if I am going to apply Lasker's Maxim I need to apply it properly without any bias. Hope you all had an easier time than me.

22.Nxf7+ Rxf7 23.Qxh5+ Rh7 24.Qg6 Bg7 25.Bf8 Qd7 26.Re1 (black is powerless against the threat of Re5, Rh5)

for example
b5 27.Re5 Ra7 28.Rh5 Rxh5 29.Bxg7+ Qxg7
30.Qxh5+ Kg8 31.Qe8+ Kh7 32.Rxg7+ Kxg7 33.Qxc8 and white is up a queen for rook with an easy win

Jan-06-13  Patriot: Black is up the bishop pair.

A very interesting candidate is 22.Be7:

22...Qxa1+ 23.Kf2

23...Bxe7 24.Nxf7+ Rxf7 25.Qxh5+ Rh7 26.Qe8+ Bf8 27.Qxf8#

23...Bg7 24.Bf6 Bxf6 25.Nxf7+ Rxf7 26.Qxh5+ Rh7 27.Qe8#

23...Bg7 24.Bf6 Kg8 25.Rxg7+ Rxg7 26.Bxg7 Kxg7 27.Qxh5

23...Bg7 24.Bf6 Bd7 25.Rxg7 Rxg7 26.Qxh5+ Kg8 27.Bxg7

23...Rh6 24.Bxf6+ Rxf6 25.Qxh5+

23...Rh6 24.Bxf6+ Kh7 25.Rg7+ Kh8 26.Nxf7#

23...Bxe5 24.Qxe5+

I'm not sure what else black can do.

Premium Chessgames Member
  Jimfromprovidence: <beatgiant> <What I had missed was, after <22. Nxf7+ Rxf7 23. Qxh5+ Rh7 24. Qg6 Bg7 25. Bf8 Qd7 26. f5>, the fact that <26...exf5> allows the powerful <27. Re1!> with a quick win.>

Ironically, you partially answered the question as to why 25 f5, below, instead of 25 Bf8 is clearly the better move.

click for larger view

The key difference is the tempo white saves by playing f5 first in order to threaten 26 f6.

Here’s an illustration: if 22. Nxf7+ Rxf7 23. Qxh5+ Rh7 24. Qg6 Bg7 25. Bf8 Qd7 26. f5, black has 26…Kg8.

click for larger view

Black can get his queen over to f7.

If 22. Nxf7+ Rxf7 23. Qxh5+ Rh7 24. Qg6 Bg7 25. f5 Qd7 26. f6 if black tries 26...Kg8 again , here is the position.

click for larger view

Here white has two powerful moves 27 Rf1 or 27 Be7!

So with 25 f5, white has the threat of f6 followed by Be7 or if f5 exf5, then the threat of Re1 or Rf1.

Jan-06-13  mistreaver: White to play. 22.? Insane.
My first thought is to make us of the Nxf7 and Qxh5 motives. But how? If immediatelly
22. Nxf7+ Rxf7
23. Qxh5 Rh7
and now Qe8 is not available, if it could be possible somehow to distract the black queen. What about something crazy looking like
The idea is to force the queen away, and black's reply is forced because both the queen and Bxf6 are threatened
22... Qxa1+
23 Kf2
Now black has a choice. Bxe5 is not an option because simply queen recaptures. a) 23... Bxe7
24 Nxf7+ Rxh7
25 Qxh5+ Rh7
26 Qe8 is curtains
b) 23...Bg7
This certainly looks more tricky.
24 Nxf7+ Kg8
And i don't know what to do here, and i don't have more time to analyse. Let's check.
Ah silly me. Having prepared everything for Nxf7 and Qxh5 trick i fainted when the goal was near. Of course that 25 Bf6 should be played after which it is all over. Anyway i feel satisfied because i was fairly close. Can't wait for Monday.
Jan-06-13  mistreaver: I meant 24. Bf6 of course.
Jan-06-13  Patriot: In the variation, <23...Bg7 24.Bf6 Kg8 25.Rxg7+ Rxg7 26.Bxg7 Kxg7 27.Qxh5 >, I missed <26...Qc1> where black wins! That's a sneaky move and very hard to see.
Jan-06-13  morfishine: <Patriot> Excellent! No visualization problems today!

<Jimfromprovidence> Nice post! I sure wish I had seen 25.f5

Jan-06-13  whiteshark: Redundant pieces are just ... redundant.
Jan-06-13  Patriot: <Jimfromprovidence> Great illustration of what a tempo can do!

<morf> Thanks! I certainly did much better than yesterday! Good job to you as well! When I was surveying the candidates, I looked at the direct 22.Nxf7+ but didn't immediately notice 24.Qg6 so I went back and looked to see if there was anything better. That's when I found 22.Be7! A "win is a win" though, so good job in finding it!

Jan-06-13  morfishine: I had pinned my hopes on 26.Ra5, but I see in PM that Black can buy time with 26...b5. So, I ran that out to see if anything was there and got this: 22.Nxf7+ Rxf7 23.Qxh5+ Rh7 24.Qg6 Bg7 25.Bf8 Qd7 <26.Ra5> b5 27.c4 Bb7 28.Bxg7+ Rxg7 29.Rh3+ Rh7 30.Qf6+ Qg7 31.Rxh7+ Kxh7 32.Qxe6 Rg8 33.g3 Qg6 34.Qd7+ Qg7 35.Qxg7+ Rxg7 36.cxb5 axb5 37.Rxb5

click for larger view

White has 4-pawns for the piece, so should be winning. Clearly though, 22.Be7 is the fastest route to victory

Jan-06-13  James D Flynn: Material is equal but Whites pieces are pointing dangerously toward the Black K. 22.Nxf7+ Rxf7 23.Qh5+ Rh7 24.Bg6 Bg7(the threat of Qe8+ and mate on the following move or Qg8# can be answered by Bd7 or the text. If Bd7 25.Qf6+ Rg7 26.Qxg7#) 25.Bf8 Qd7(if Qxa1+ 26.Kf2 Bd7(the Q has useful checks) 27.Bxg7+ Kg8 28.Bf6+ Kf8 29.Qg8#} 26.Ra5 and Black is helpless against the threats of 27.Bxg7+ Rxg7 28.Qh6+ Kg8 and either Rg5 or Rh5 with mate o follow shortly. This seemed unusually easy for a Sunday : a couple of forcing checks a quiet move that threatened mate and a spectacular move allowing the loss of a R with check but forced mate by 4 checks or the better Qd7 where the R lift and move t o the K-side decides the issue.. I’ d give it a Friday puzzle but maybe I should check the game before I issue this verdict.
Jan-06-13  BOSTER: <gofer> <Where is the win here?>.

You know I don't want to be <special>, but I'd say I agree with you.

Jan-06-13  Kikoman: <Nxf7+> and <Qxh5> are my candidates move. :D
Premium Chessgames Member
  LIFE Master AJ: Funny! Fritz 13 likes my Qe4, at least initially, I only let it run a few minutes.
Premium Chessgames Member
  LIFE Master AJ: According to Rybka, Houdini and Fritz 13, 22.Qe4 might be better than 22.Be7. (I did NOT let them run more than a couple of minutes each, so its possible a very deep analysis might reveal something different.

It also turns out that my instincts might have been correct. 22.NxP/f7+ might also win, although I did not go deep enough.


Jan-06-13  BOSTER: Howell understood very good that "The pawn is the soul of the game".

Ironically , this irresistible love encouraged him to move six pawns during the opening. But if he played with pieces, we wouldn't have today <POTD>.

Jan-06-13  Patriot: <LMAJ> I let Houdini run for 23-ply and there are at least 6 winning moves including 22.Qe4 and 22.Nxf7+:

New game - Houdini 1.5a x64,

click for larger view

Analysis by Houdini 1.5a x64:

1. (#17): 1.Be7 Qxa1+ 2.Kf2 Bg7 3.Bf6 Qc1 4.Bxg7+ Kg8 5.Bh6+ Rg7 6.Rxg7+ Kf8 7.Rxf7+ Ke8 8.Rf8+ Ke7 9.Ng6+ Kd7 10.f5 Kc6 11.Qe4+ Kc7 12.Qe5+ Kc6 13.Ne7+ Kb6 14.Qd6+ Ka7 15.Qc5+ b6 16.Qc7+ Bb7

2. (#22): 1.Nxf7+ Rxf7 2.Qxh5+ Rh7 3.Qg6 Bg7 4.f5 Qxa3 5.Rxa3 Bd7 6.f6 e5 7.fxg7+ Kg8 8.cxd4 Rh4 9.Qd6 Bg4 10.Qd5+ Kh7 11.dxe5 a5 12.Qe4+ Kg8 13.Qc4+ Kh7 14.Rxg4 Rxg4 15.Qxg4 Re8 16.Qh5+ Kxg7

3. (5.55): 1.Rf1 Qb5 2.Rg5 h4 3.Nxf7+ Rxf7 4.Rxb5 axb5 5.Bd6 dxc3 6.Be5 Bxe5 7.Qxe5+ Rg7 8.Qh5+ Kg8 9.Qxb5 Bd7 10.Qxb7 Rf8 11.Qc7 Kh7 12.Qc5 Rf5 13.Qxc3 Rgf7 14.Qd4 e5 15.Qe4 Kh6 16.d4 exf4

4. (3.46): 1.Bb2 Qe8 2.cxd4 Bd7 3.c4 Bg7 4.Re1 Kg8 5.Nxd7 Qxd7 6.d5 exd5 7.Qe5 f6 8.Qxf6 Rf8 9.Qg5 h4 10.Rg4 Rf5 11.Qg6

5. (2.75): 1.c4 Qe8 2.Bc5 Qd8 3.Bb6 Qe7 4.Bxd4 h4 5.Rg5 Rg7 6.Rh5+ Kg8 7.Kh1 Rh7 8.Rxh7 Kxh7 9.Qh5+ Kg8 10.Bc5 Qe8

6. (2.47): 1.Qe4 Qe8 2.Bc5 h4 3.Rg5 Bg7 4.cxd4 h3 5.gxh3 Bf6 6.Rg4 Rh5 7.c4 a5 8.Ra2 Bd7

Premium Chessgames Member
  LIFE Master AJ: <Patriot> Thanks for confirming my hunches.
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  takchess: Superman and Green Lantern Ain't Got Nothing on Me
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