Author: Uri Blass
Date: 05:37:42 01/11/04
Go up one level in this thread
On January 11, 2004 at 08:08:39, Uri Blass wrote: >On January 11, 2004 at 07:46:09, Kurt Utzinger wrote: > >>On January 11, 2004 at 05:43:04, Jouni Uski wrote: >> >>>[D]r1r3k1/4bp1p/1qp1b1p1/1p1n4/3PB3/P5N1/1BQ2PPP/R3R1K1 w - - 0 21 >>> >>>In this position Ruffian plays almost instantly Bxg6. Is this real sacrifice? >>>Is it correct? Actually Ruffian lost this game against Fritz... >>> >>>Jouni >>> >>>PS: I hope, that next Ruffian update gives the missing 70 points from promised >>>100 over 1.0.1 :-) >> >> >> Hi Jouni >> I think that Bxg6 is a most interesting sacrifice that >> should at least be good enough for a draw. >> Kurt > >I agree but Re1 is probably not the right move to continue and Yace can see a >draw score for 4.Ne4(I chose yace because based on experience it tends to >underestimate king safety and if even it can see a draw and learn a draw score >in the root position then white probably has a draw). > > > >New game >r1r2k2/4b3/1qp1p1Q1/1p1n4/3PN3/P7/1B3PPP/R5K1 b - - 0 1 > >Analysis by Yace Paderborn: > >4...Bxa3 5.Rxa3 > = (0.11) Depth: 1 00:00:00 >4...Bh4 5.Qxe6 > -+ (-1.64) Depth: 1 00:00:00 >4...Rd8 5.Qxe6 > -+ (-1.76) Depth: 1 00:00:00 >4...Re8 5.Qxe6 Bxa3 6.Bxa3+ Rxa3 > -+ (-2.57) Depth: 1 00:00:00 >4...Re8 5.Qxe6 Bxa3 6.Bxa3+ Rxa3 > -+ (-2.57) Depth: 1 00:00:00 >4...Re8 5.Qh6+ Kf7 > -+ (-2.54) Depth: 2 00:00:00 >4...Re8 5.Qh6+ Kf7 > -+ (-2.54) Depth: 2 00:00:00 >4...Re8 5.Qh6+ Kg8 6.Qxe6+ Kg7 7.Qe5+ Kg8 > -+ (-2.00) Depth: 3 00:00:00 >4...Re8 5.Qh6+ Kg8 6.Qg6+ Kf8 > = (0.00) Depth: 3 00:00:00 >4...Re8 5.Qh6+ Kg8 6.Qg6+ Kf8 7.Qh6+ Kg8 8.Qg6+ Kf8 > = (0.00) Depth: 3 00:00:00 >4...Rd8 5.Qxe6 > = (-0.01) Depth: 3 00:00:00 >4...Rd8 5.Qxe6 Ke8 > -+ (-2.21) Depth: 3 00:00:00 >4...c5 5.Rb1 > -+ (-2.22) Depth: 3 00:00:00 >4...c5 5.dxc5 Bxc5 6.Nxc5 > -+ (-2.31) Depth: 3 00:00:00 >4...Nc7 5.Rc1 > -+ (-2.32) Depth: 3 00:00:00 >4...Nc7 5.Ng5 Re8 > -+ (-2.55) Depth: 3 00:00:00 >4...Nc7 5.Ng5 Re8 > -+ (-2.55) Depth: 3 00:00:00 >4...Nc7 5.Ng5 Bxg5 6.Qxg5 > -+ (-2.40) Depth: 4 00:00:00 >4...Nc7 5.Ng5 Bxg5 6.Qxg5 > -+ (-2.40) Depth: 4 00:00:00 >4...Nc7 5.d5 Bxa3 6.Bxa3+ b4 > -+ (-2.00) Depth: 5 00:00:00 >4...Nc7 5.d5 Bxa3 6.Bxa3+ b4 > µ (-1.00) Depth: 5 00:00:00 >4...Nc7 5.d5 e5 6.d6 Bxd6 7.Nxd6 Rxa3 > µ (-1.00) Depth: 5 00:00:00 >4...c5 5.Qh6+ Ke8 6.Qh5+ Kd7 7.Nf6+ Nxf6 8.Rd1 > µ (-1.01) Depth: 5 00:00:00 >4...c5 5.dxc5 Bxc5 6.Nxc5 Rxc5 7.Rd1 > -+ (-2.09) Depth: 5 00:00:00 >4...c5 5.dxc5 Bxc5 6.Nxc5 Rxc5 7.Rd1 > -+ (-2.09) Depth: 5 00:00:00 >4...c5 5.dxc5 Bxc5 6.Nxc5 Rxa3 7.Bxa3 e5 > -+ (-1.69) Depth: 6/19 00:00:00 145kN >4...c5 5.Bc1 Bd6 6.Bh6+ Ke7 7.Bg5+ Kd7 8.Qf7+ Ne7 9.dxc5 Rxc5 > µ (-1.06) Depth: 6/19 00:00:01 352kN >4...e5 5.Qh6+ Ke8 6.Nd6+ Bxd6 7.Qg7 Ne7 8.dxe5 > µ (-1.07) Depth: 6/24 00:00:01 600kN >4...e5 5.dxe5 Rd8 6.Qf5+ Ke8 7.Qh5+ Kd7 8.Qh3+ Kc7 9.Rd1 > µ (-1.30) Depth: 6/24 00:00:02 680kN >4...Rcb8 5.Qh6+ Ke8 6.Nd6+ Bxd6 7.Qxe6+ Ne7 8.Re1 Bxh2+ 9.Kxh2 > µ (-1.31) Depth: 6/24 00:00:02 817kN >4...Rcb8 5.Bc1 Bb4 6.Bb2 Ba5 7.Qxe6 Re8 > -+ (-1.72) Depth: 6/24 00:00:03 973kN >4...Qb8 5.Qxe6 Nf4 6.Qh6+ Ke8 7.Nf6+ Bxf6 8.Rb1 > -+ (-1.73) Depth: 6/24 00:00:03 1193kN >4...Qb8 5.Qxe6 Nf4 6.Qh6+ Ke8 7.Qh8+ Kd7 8.Nf6+ Bxf6 9.Qxf6 > -+ (-1.93) Depth: 6/24 00:00:03 1224kN >4...Qb8 5.Qxe6 Nf4 6.Qh6+ Ke8 7.Qh8+ Kd7 8.Nf6+ Bxf6 9.Qxf6 > -+ (-1.93) Depth: 6/24 00:00:04 1293kN >4...Qb8 5.Bc1 Bd6 6.Bh6+ Ke7 7.Bg5+ Kd7 8.Qf7+ Ne7 9.Nc5+ Kd8 10.Bxe7+ Bxe7 >11.Qg8+ Kc7 12.Qxe6 Bxc5 > -+ (-1.60) Depth: 7/24 00:00:05 1829kN >4...Qa5 5.Qxe6 > -+ (-1.61) Depth: 7/26 00:00:08 2942kN >4...Qa5 5.Qxe6 b4 6.a4 b3 7.Qh6+ Ke8 8.Qh8+ Kf7 9.Qe5 > -+ (-1.68) Depth: 7/26 00:00:08 3111kN >4...Qa5 5.Qxe6 b4 6.a4 b3 7.Qh6+ Ke8 8.Qh8+ Kf7 9.Qe5 > -+ (-1.68) Depth: 7/26 00:00:09 3201kN >4...Qa5 5.Qxe6 Qb6 6.Rc1 Qb7 7.Nc5 Qa7 8.Rc2 > -+ (-1.50) Depth: 8/26 00:00:12 4472kN >4...Qa5 5.Qxe6 Qb6 6.Rc1 Qb7 7.Nc5 Qa7 8.Rc2 > -+ (-1.50) Depth: 8/28 00:00:22 8323kN >4...Qa5 5.Bc3 Nxc3 6.Nf6 Bxa3 7.Qg8+ Ke7 8.Qg7+ Kd8 9.Rxa3 Qc7 10.Qxc7+ Rxc7 >11.Rxa8+ Ke7 > µ (-1.10) Depth: 9/28 00:00:29 11054kN >4...Qa5 5.Bc3 Nxc3 6.Nf6 Ne2+ 7.Kh1 Qe1+ 8.Rxe1 Bb4 9.axb4 Ra1 > = (-0.10) Depth: 9/28 00:00:31 11658kN >4...Qa5 5.Bc3 Nxc3 6.Nf6 Ne2+ 7.Kh1 Bxf6 8.Qxf6+ Ke8 9.Qxe6+ Kd8 10.Qd6+ Ke8 >11.Qe6+ Kd8 12.Qd6+ Ke8 13.Qe6+ > = (0.00) Depth: 9/28 00:00:31 11798kN >4...Qa5 5.Bc3 Nxc3 6.Nf6 Ne2+ 7.Kh1 Bxf6 8.Qxf6+ Ke8 9.Qxe6+ Kd8 10.Qd6+ Ke8 >11.Qe6+ Kd8 12.Qd6+ Ke8 13.Qe6+ > = (0.00) Depth: 9/36 00:01:19 30402kN >4...Qa5 5.Bc3 Nxc3 6.Nf6 Ne2+ 7.Kh1 Bxf6 8.Qxf6+ Ke8 9.Qxe6+ Kd8 10.Qd6+ Ke8 >11.Qe6+ > = (0.00) Depth: 10/36 00:01:24 32328kN > >(Blass, Tel-Aviv 11.01.2004) > > >Uri I can add that I could even teach yace only material that it is 0.00 but it was harder. My conclusion is that there was no true sacrifice in the first move and if Ruffian lost the game it is because of later true sacrifice. I tend to think that Re1 is also not the true sacrifice because yace only material's score get close to 0.00 when I search deep after Re1. Uri Uri
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