Author: Uri Blass
Date: 02:28:38 10/30/01
Go up one level in this thread
On October 30, 2001 at 04:11:22, Uri Blass wrote: <snipped> >[D]r2r2k1/5pp1/1q2p2p/2b1n3/p2NP1P1/Pp2B2P/1PPRQ3/K2R4 b - - 0 24 >2)finding 24...Rac8 >I know no program that can find it and maybe better hardware can help here. >I used my p800 for many hours > >Here is Deep Fritz's opinion > >Luba kristol - Uri blass >r2r2k1/5pp1/1q2p2p/2b1n3/p2NP1P1/Pp2B2P/1PPRQ3/K2R4 b - - 0 1 > >Analysis by Deep Fritz: > >24...bxc2! > µ (-0.78) Depth: 3/15 00:00:00 2kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bxc5 Qxc5 28.Qe3 > µ (-0.84) Depth: 5/15 00:00:00 16kN >24...bxc2 25.Nxc2 Rxd2 26.Rxd2 Rc8 27.Bf4 Ng6 28.Be3 > µ (-0.81) Depth: 6/19 00:00:00 35kN >24...bxc2 25.Nxc2 Rxd2 26.Bxd2 Rb8 27.Bc3 Bd6 28.Qe3 Qc6 > µ (-0.81) Depth: 7/19 00:00:00 125kN >24...bxc2 25.Nxc2 Rxd2 26.Bxd2 Rb8 27.Bc3 Bd6 28.Qe3 Bc5 29.Qg3 > µ (-0.81) Depth: 8/21 00:00:00 301kN >24...bxc2 25.Nxc2 Rxd2 26.Bxd2 Ng6 27.Bc3 Rc8 28.Qf3 Nh4 29.Qg3 Qb3 30.Qxh4 > µ (-0.72) Depth: 9/24 00:00:02 1368kN >24...bxc2 25.Nxc2 Bxe3 26.Qxe3 Rxd2 27.Qxd2 Rc8 28.Nb4 Qb5 29.Qf4 f6 30.h4 > µ (-0.75) Depth: 10/29 00:00:07 5266kN >24...bxc2 25.Nxc2 Bxe3 26.Qxe3 Rxd2 27.Rxd2 Qc7 28.Ne1 Rc8 29.Rc2 Nc4 30.Qd3 > µ (-0.75) Depth: 11/29 00:00:15 11274kN >24...bxc2 25.Nxc2 Bxe3 26.Qxe3 Rxd2 27.Rxd2 Qc6 28.Qf4 f6 29.Nb4 Qc1+ 30.Ka2 > µ (-0.78) Depth: 12/30 00:00:44 33664kN >24...bxc2 25.Nxc2 Bxe3 26.Qxe3 Rxd2 27.Rxd2 Qb7 28.Rd4 Rc8 29.Nb4 f6 30.Ka2 > µ (-0.88) Depth: 13/33 00:03:04 137940kN >24...bxc2 25.Nxc2 Bxe3 26.Qxe3 Rxd2 27.Rxd2 Qb7 28.Rd1 Rc8 29.Nb4 f6 30.Qd4 > µ (-0.81) Depth: 14/34 00:05:48 262014kN >24...Rdc8! > µ (-0.84) Depth: 14/38 00:12:43 573205kN >24...Rdc8! 25.g5 Qa5 26.Rb1 Bxd4 27.Rxd4 bxc2 28.Rc1 hxg5 29.Rxc2 Rxc2 30.Qxc2 > µ (-1.00) Depth: 14/39 00:35:25 1540248kN >24...Rdc8 25.g5 Qa5 26.cxb3 Bxa3 27.bxa3 axb3 28.Nb5 Nc4 29.Rd8+ Rxd8 > µ (-1.16) Depth: 15/41 00:57:56 2548438kN >24...Rdc8 25.h4 Bxa3 26.bxa3 Nc4 27.c3 Nxa3 28.g5 Rxc3 29.Rd3 > µ (-1.38) Depth: 16/42 02:15:41 6024725kN >24...Rdc8 25.g5 hxg5 26.c3 Qa5 27.Bxg5 Bxa3 28.bxa3 Qxc3+ 29.Rb2 Qc5 > µ (-1.38) Depth: 17/43 04:57:02 13305290kN >24...Rdc8 25.c3 Bxa3 26.Nb5 Bc5 27.Bxc5 Qxc5 28.Na3 Qe7 29.Qe3 Rc5 > -+ (-1.50) Depth: 18/46 12:51:09 34696303kN >24...Rdc8 25.c3 Bxa3 26.Nb5 Bc5 27.Bxc5 Qxc5 28.Na3 Qe7 29.Rd6 Qh4 30.Qe3 > -+ (-1.44) Depth: 19/45 22:52:22 62190875kN > >(Blass, Tel-aviv 13.07.2001) > >programs usually prefer this move and I found that I win a pawn by 24...Rdc8 >25.c3 Bxa3 26.Nb5 Bc5 27.Bxc5 Qxc5 28.Na3 Nc4 29.Nxc4 Qxc4 30.Qxc4 Rxc4 but it >was not enough for me > >A possible alternative in this line is 26...Bxb2+ and not 26...Bc5 but I did not >find a forced win > >I am not sure if 24...Rac8 is the only winning move but it seems more convincing >than 24...Rdc8 > >After Rac8 >25.c3 Bxa3 26.bxa3 Qa5 27.Kb1 Nc4 28.Rd3 Nxa3+ 29.Kb2 Nc4+ 30.Kb1 Qa8 Qa8 seems to be not the best move by yace's opinion Here is yace analysis after learning by analyzing the position after 30..Qa8 into depth 12 Luba kristol - Uri blass 2rr2k1/5pp1/4p2p/q7/p1nNP1P1/1pPRB2P/4Q3/1K1R4 b - - 0 1 Analysis by Yace 0.99.56: 30...g5 31.Nxb3 Rxd3 32.Rxd3 Rb8 33.Ka2 Nb2 34.Rd8+ Kh7 +- (1.74) Depth: 12 00:00:00 1085320kN 30...Nxe3 31.Qxe3 ² (0.51) Depth: 12 00:00:00 1085320kN 30...Ne5 ² (0.43) Depth: 12 00:00:00 1085320kN 30...Qe5 ² (0.32) Depth: 12 00:00:00 1085320kN 30...Qa8 31.Bxh6 gxh6 32.g5 a3 33.Nxb3 Rxd3 34.Rxd3 Rb8 35.Ka2 Qa4 36.Qd1 Nb2 37.Rd8+ Kh7 38.g6+ fxg6 -+ (-1.74) Depth: 12 00:00:00 1085320kN 30...Rxd4 31.Bxd4 a3 32.Ka1 Rb8 33.R3d2 Nxd2 34.Qxd2 Qb5 35.Kb1 b2 36.Qxh6 gxh6 37.c4 -+ (-1.75) Depth: 12 00:03:40 79526kN 30...Rxd4 31.Bxd4 a3 32.Ka1 Rb8 33.Rb1 Qb5 34.Qd1 Ne3 35.Bxe3 Qxd3 36.Qxd3 -+ (-1.76) Depth: 12 00:04:39 99008kN 30...Rxd4 31.Bxd4 a3 32.Ka1 Rb8 33.Rb1 Qa4 34.Qd1 a2 35.Rb2 Nxb2 36.Kxb2 Ra8 37.Kc1 a1Q+ 38.Kd2 -+ (-2.16) Depth: 13 00:10:02 206021kN 30...Rxd4 31.Bxd4 a3 32.Ka1 Rb8 33.Qf2 Qb5 34.Bb6 a2 35.R3d2 Nxd2 36.Rxd2 Rxb6 37.g5 Rb8 38.gxh6 -+ (-2.92) Depth: 13 00:12:45 259179kN (Blass, Tel-aviv 30.10.2001) Uri
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