Author: Uri Blass
Date: 12:29:46 03/11/05
Go up one level in this thread
On March 11, 2005 at 14:29:54, John Merlino wrote: >On March 11, 2005 at 14:16:45, Terry McCracken wrote: > >>On March 11, 2005 at 13:33:45, John Merlino wrote: >> >>>On March 11, 2005 at 12:22:38, Uri Blass wrote: >>> >>>>[D]r2qk2r/pb1nbppp/1pp5/3BP3/8/2N3P1/PP2PP1P/R1BQ1RK1 w kq - 0 12 >>>> >>>>The following position happened in my last tournament game. >>>> >>>>I chose a move in tal's style that is not typical to my style and played Bxf7+ >>>> >>>>Note that I did not see that this move win a pawn when I played it and I later >>>>blundered in the game at move 17 and played a move that probably let my opponent >>>>to escape with a draw but my opponent also blundered so I was a pawn up from the >>>>sacrifice. >>>> >>>>Note that inspite of the fact that I won the game I think that it was a >>>>practical mistake to play 12.Bxf7+ [I am not tal and I should not try to play >>>>like him(espacially when my position is better) if I want to have better >>>>results] and 12.Be4 is a better practical move because it gives white a >>>>positional advantage with no risk. >>>> >>>>Uri >>> >>>CM9_R1 on an AMD 2500 says this: >>> >>>Time Depth Score Positions Moves >>>0:00 1/3 1.00 768 12.Bg2 Nxe5 13.Bf4 >>>0:00 1/4 1.12 2320 12.Bg2 O-O 13.Bf4 Nc5 14.Be3 >>>0:00 1/5 1.08 11537 12.Bg2 Nxe5 13.Bf4 Nc4 14.Qa4 >>>0:00 1/6 0.92 29117 12.Bg2 Nxe5 13.Bf4 Ng6 14.Qa4 Nxf4 >>> 15.Bxc6+ Bxc6 16.Qxc6+ Kf8 17.gxf4 >>>0:00 1/6 0.93 39939 12.Bh1 O-O 13.f4 Bc5+ 14.e3 Bb4 >>> 15.a3 >>>0:02 1/7 0.80 135184 12.Bh1 Nxe5 13.Bf4 Ng6 14.Qa4 O-O >>> 15.Rfd1 >>>0:02 1/7 0.92 168267 12.Bg2 Nxe5 13.Bf4 Ng6 14.Qa4 Nxf4 >>> 15.Bxc6+ Bxc6 16.Qxc6+ Kf8 17.gxf4 >>>0:03 1/8 0.72 252492 12.Bg2 Nxe5 13.Qa4 O-O 14.Bf4 Bd6 >>> 15.Rad1 Qe7 16.Ne4 >>>0:05 1/8 1.03 569553 12.Be4 Nxe5 13.Qc2 Bc5 14.Bf4 Qf6 >>> 15.Rad1 g5 >>>0:09 1/9 0.84 1323048 12.Be4 Nc5 13.Bg2 Qc7 14.f4 Rd8 >>> 15.Qc2 O-O 16.Be3 Ba6 >>>0:16 1/10 1.00 3199543 12.Be4 Nc5 13.Bg2 Qc7 14.f4 Rd8 >>> 15.Qc2 O-O 16.Be3 Ba6 17.Rad1 >>>0:41 1/11 0.85 8961628 12.Be4 Nxe5 13.Qc2 Ng6 14.h4 Bf6 >>> 15.Rd1 Qe7 16.h5 Ne5 17.Bf4 Rd8 >>> 18.Rxd8+ Qxd8 19.Bxh7 >>>1:41 1/12 1.01 23739569 12.Be4 Nxe5 13.Qc2 Ng6 14.Be3 O-O >>> 15.Rad1 Qb8 16.f4 Rd8 17.Bg2 Qc8 >>> 18.Ne4 >>> >>>After forcing 12.Bxf7+ Kxf7 13.e6+ Kxe6+ 14.Qb3+ Kf6, it says this.... >>> >>>Time Depth Score Positions Moves >>>0:00 1/4 -0.08 10900 15.Rd1 Qe8 16.Bf4 Kg6 17.Qc4 >>>0:00 1/3 -0.86 2919 15.Rd1 g5 16.h4 Kg7 17.Bxg5 Bxg5 >>> 18.hxg5 Qxg5 >>>0:00 1/3 -1.01 3458 15.Be3 Nc5 16.Qc4 Kg6 >>>0:00 1/3 -0.91 4594 15.Ne4+ Kg6 16.Nd6 Bxd6 17.Qd3+ >>> Kf7 18.Qxd6 >>>0:00 1/4 -0.08 9708 15.Rd1 Qe8 16.Bf4 Kg6 17.Qc4 >>>0:00 1/4 -0.91 13484 15.Ne4+ Kg6 16.Qe6+ Nf6 17.Be3 Qd7 >>>0:00 1/4 -0.51 16961 15.Be3 Kg6 16.Qe6+ Nf6 17.Rad1 Qc7 >>>0:00 1/3 -0.86 2919 15.Rd1 g5 16.h4 Kg7 17.Bxg5 Bxg5 >>> 18.hxg5 Qxg5 >>>0:00 1/4 -0.08 9708 15.Rd1 Qe8 16.Bf4 Kg6 17.Qc4 >>>0:00 1/5 -0.17 24593 15.Rd1 Qe8 16.Qc4 Ne5 17.Qf4+ Ke6 >>> 18.Be3 >>>0:00 1/6 -0.11 74280 15.Rd1 Qe8 16.Be3 c5 17.Bf4 Kg6 >>> 18.Nd5 >>>0:01 1/7 -0.08 330626 15.Rd1 Qe8 16.Rd4 c5 17.Ne4+ Kg6 >>> 18.Qe6+ Nf6 19.Nxc5 >>>0:03 1/8 -0.18 831288 15.Rd1 Qe8 16.Ne4+ Kg6 17.Qe6+ >>> Nf6 18.Nxf6 gxf6 19.Bf4 Rd8 20.e4 >>> Rxd1+ 21.Rxd1 >>>0:12 1/9 0.32 3211265 15.Rd1 Qe8 16.Ne4+ Kg6 17.Qe6+ >>> Nf6 18.Nxf6 gxf6 19.Rd7 Bc8 20.Qg4+ >>> Kf7 21.Qh5+ Ke6 >>>0:34 1/10 0.52 9188889 15.Rd1 Qe8 16.Ne4+ Kg6 17.Rd4 h5 >>> 18.Ng5 Bxg5 19.Qd3+ Kh6 20.Bxg5+ >>> Kxg5 21.Rxd7 Rd8 >>>1:34 1/11 0.66 26541817 15.Rd1 Qe8 16.Ne4+ Kg6 17.Rd4 h5 >>> 18.Ng5 Bxg5 19.Qd3+ Kh6 20.Bxg5+ >>> Kxg5 21.Rxd7 Bc8 22.Rxg7+ Kh6 >>> >>>jm >> >>Check my lines...it appears Bxf7+!! will eventually win in style. >> >>I'm sure there is room for improvement. >> >>http://www.talkchess.com/forums/1/message.html?416358 > >The King's final PV agrees with your first line all the way up to 22.Kh6 (where >the PV ends). Since this is 22-ply away from the initial position, and the eval >is going up with each depth, you are probably correct that Bxf7+ is also a >winner. > >Forcing some moves down this line, it seems that 21...Kh6 might be better than >21...Bc8, but the eval is +2 for White at this point, so it definitely looks >good. > >I think the hard part for a human OTB would be finding the Knight sac 18.Ng5, >but Uri would know better than I about this. > >jm Practically in the game I missed the fact that 17.Rd4 is a strong move and played after 30 minutes of thinking 17.Qe6+ that is good only for a draw against correct defence. fortunately my opponent also blundered and after 17...Nf6 18.Nxf6 Bxf6? 19.Qg4+ I got position with a pawn advantage I did not see during the game more than a draw after 17...gxf6 Uri
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