Author: Drexel,Michael
Date: 12:56:13 12/18/02
Go up one level in this thread
On December 18, 2002 at 15:46:37, Drexel,Michael wrote: >On December 18, 2002 at 10:02:38, Uri Blass wrote: > >>On December 18, 2002 at 09:25:13, Drexel,Michael wrote: >> >>>On December 18, 2002 at 07:48:32, Thorsten Czub wrote: >>> >>>>http://f50.parsimony.net/forum200318/messages/1587.htm >>>> >>>>we are doing a match between a few interesting chess programs. >>>>all programs get 30' per move on a 1200 mhz machine. >>>> >>>>instead of using BIG BOOKS we use 1.a3 a6 as the beginning position. >>>>all computer programs are out of book after these forced moves and have >>>>to compute from move 2. >>>> >>>>Maybe we will add some more interesting programs. >>>> >>>>If you have ideas which one, please tell us. >>>> >>>>(some programs use new styling!) >>>> >>>>thank you, >>>>Thorsten Czub >>> >>>[Event "Fernschachpartie 30' pro Zug, Vorgabe 1.a3 a6"] >>>[Site "1200 mhz"] >>>[Date "2002.11.26"] >>>[Round "1"] >>>[White "Junior7"] >>>[Black "ChessTiger15"] >>>[ECO "A00"] >>>[Result "*"] >>> >>>1. a3 a6 2. d4 d5 3. Bf4 Bf5 4. e3 e6 5. Bd3 Bg6 6. h4 Bd6 7. h5 Bxd3 8. Qxd3 >>>Bxf4 9. exf4 Nh6 10. Nc3 Nd7 >>>11. Qe2 O-O 12. O-O-O b5 13. Nf3 >>> >>>this shows how bad Junior 7 can play sometimes without its opening book. 13...c5 >>>and black is winning. Shredder 7, Fritz 7 and probably most top-engines would >>>never play 6.h4,7.h5 in this position. this is a stupid plan. Junior 7 is a >>>great engine (can handle some positions like no other engine) anyway. >> >>I think that black is better but it is too early to decide that black is >>winning. >> >>some analysois with movei produce the following line >> >>13...c5 14.dxc5 Nxc5 15.Nd4 Qd6 16.g3 Nd7 when movei says at the end of >>iteration 13: >> >>depth=13 -0.04 c3a2 a8c8 c1b1 d7c5 h1e1 f8e8 a2b4 f7f6 c2c3 h6f7 d4f5 d6c7 f5d4 >>Nodes: 89010497 NPS: 149519 >> >>Uri > >Im tempted to say: ask any GM about the position and he will tell you that black >is winning. >you only believe in computer evaluations? OK > >first of all: 15...Qb8 is the move. 15...Qd6 is not of any interest. 15...Qb8 >prepares b4 with deadly attack and threatens also Qxf4+. >I have analysed the position after 15...Qb8 with my new Shredder 7: > >[D] rq3rk1/5ppp/p3p2n/1pnp3P/3N1P2/P1N5/1PP1QPP1/2KR3R w - - 0 1 > >Analysis by Shredder 7: > >1. µ (-0.86): 16.Qe5 Qxe5 17.fxe5 Ng4 18.Rde1 Nxf2 19.Rhf1 Nfe4 20.Nxe4 Nxe4 >21.Rd1 >2. µ (-0.88): 16.Qe3 Rc8 17.f5 e5 18.Nxd5 exd4 19.Ne7+ Kh8 20.Rxd4 Qb6 21.Rhd1 >Re8 22.Rd6 >3. µ (-1.36): 16.Kb1 Qxf4 17.g4 Rab8 18.Nc6 Rb7 19.f3 Rc8 20.Nb4 Rg5 21.Nd3 Rbc7 >22.Qe5 >4. µ (-1.36): 16.g4 Qxf4+ 17.Kb1 Rab8 18.Nc6 Rb7 19.f3 Rc8 20.Nb4 Qg5 21.Nd3 >5. -+ (-1.43): 16.f5 b4 17.axb4 Qxb4 18.Na2 Qa5 19.Kb1 Qb6 20.Rhe1 Rab8 21.b3 a5 >22.fxe6 fxe6 >6. -+ (-1.66): 16.Qf3 b4 17.Nc6 Qb7 18.Nxb4 Rab8 19.Ncxd5 exd5 >7. -+ (-1.79): 16.Qd2 b4 17.axb4 Qxb4 18.Nxd5 Qxd2+ 19.Rxd2 exd5 20.Nc6 Ne4 >21.Rxd5 > >Depth 15/42 822538kN > >After 16.Qe5, >Qxe5 17.fxe5 Ng4 18.Rde1 Nxf2 19.Rhf1 Nfe4 20.Nxe4 Nxe4 is forced. >Black is a whole pawn up with an excellent outpost for his knight at e4. >whites pawns are very weak. >This should be enough to win the game. > >So we have to check 16.Qe3: > >16.Qe3 Rc8 (16...b4 17.Nc6 Qb6 18.Ne7+ (18.Nxb4 Rab8 -+) Kh8 19.Nexd5 is better >for black but maybe not a forced win.) >now if white tries to stop b4 with 17.Sa2 black simply plays a5. This is an easy >win. white must try 17.f5 to create some counterplay and black wins a piece with >17...e5 18.Nxd5 exd4 19.Ne7+. >after 19...Kf8 (19...Kh8 is possible too)20.Rxd4 [20.Nxc8 Qxc8 21.Rxd4 (21.Qxd4 >Nb3+ -+; 21.Qf3 d3 -+)) Nxf5 22.Rd8+ Qxd8 23.Qxc5+ Se7 24.h6 gxh6 -+]Re8 21.f6 >Nf5 it seems to me that black can defend and win with his extra piece. >for example 22.Qg5 Ne6 23.Qf5 Nxd4 24.Qxh7 Qf4+ 25.Kb1 Qxf6 26.Re1 >(26.Sd5 Qh6 -+) Ne6 27.Nf5 g6 -+
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