Author: Uri Blass
Date: 01:11:22 10/30/01
[Event "?"] [Site "?"] [Date "????.??.??"] [Round "?"] [White "Luba kristol"] [Black "Uri blass"] [Result "*"] [ECO "B80"] [Annotator "Blass,U"] [PlyCount "60"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Qd2 b5 8. f3 Bb7 9. O-O-O Nbd7 10. g4 h6 11. Bd3 Ne5 12. Rhe1 b4 13. Nce2 d5 14. Ng3 dxe4 15. Bxe4 Nxe4 16. Nxe4 Bxe4 17. fxe4 Bc5 18. Qe2 Qb6 19. Kb1 O-O 20. Rd2 a5 21. Red1 Rfd8 22. h3 a4 23. Ka1 b3 24. a3 Rac8 25. cxb3 axb3 26. Kb1 Qb7 27. Bf4 Nc4 28. Rd3 Bxa3 29. Rxb3 Qa6 30. Rdd3 Bxb2 * Bxb2 was played with the condition if 31.Nc2 then Bf6 and the female world champion resigned. There are 2 test position for programs [D]r2qkb1r/5pp1/p3p2p/4n3/1p1NP1P1/4B3/PPPQ3P/2KRR3 b kq - 0 17 1)finding Bc5 (Deep fritz cannot see it even after many hours and prefers the wrong move Nxg4 but Gandalf can see it in 2 seconds when tiger after a long time likes Nc4) I analyzed Nxg4 the position after Nxg4 for a long time and my conclusion is that 17...Nxg4 18.Bf4 is not better for black when I believe that Bc5 is better for black [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 was the winning line for black that was suggested by my computers and I did not find a good alternative for white(I had to check many alternatives including the game move 25.cxb3 and 25.g5). Uri
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