Author: Drexel,Michael
Date: 12:46:37 12/18/02
Go up one level in this thread
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: 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 -+
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.