Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Revised ECM Test Suite (update)

Author: Vincent Lejeune

Date: 07:45:23 07/21/04

Go up one level in this thread


On July 20, 2004 at 11:36:05, Omid David Tabibi wrote:

>http://www.cs.biu.ac.il/~davoudo/pubs/ecmx.epd
>
>Remaining positions that are still unclear (the winning line is not clear):
...
>r3k1r1/pb1qpp1p/1pnp1n1B/2p2R2/3PP3/2P3PN/P1P3BP/R2Q3K b q - bm Nxe4; id
>"ECM.561";
...

after the logical ...Nxe4 2.Bxe4 Nxd4 , I let shredder search for 45 min with 2
best moves , nothing special

analysis by Shredder 8:

1. = (0.22): 3.Tf4 Txg3 4.cxd4 Fxe4+ 5.Txe4 Dxh3 6.Txe7+ Rxe7 7.De1+ Rd7 8.Dxg3
Dxh6 9.Df3 Tf8 10.Db7+ Re6 11.De4+ Rf6 12.Tg1 Td8 13.d5 Dh3 14.c4 Tf8 15.Tg2 h5
16.Tg1
2. ยต (-1.24): 3.Td5 De6 4.Txd4 Fxe4+ 5.Txe4 Dxe4+ 6.Rg1 0-0-0 7.Cf2 Dg6 8.Fd2 e5
9.Df3 Rb8 10.a4 d5 11.a5 bxa5 12.Txa5 Dxc2 13.Dxf7

Then I analyzed by moving piece with looking at shredder eval :

[Event "11 pos ecm"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "ECM.561"]
[Black "?"]
[Result "*"]
[SetUp "1"]
[FEN "r3k1r1/pb1qpp1p/1pnp1n1B/2p2R2/3PP3/2P3PN/P1P3BP/R2Q3K b q - 0 1"]
[PlyCount "10"]

1... Nxe4 (1... Rg6 2. Bc1) 2. Bxe4 Nxd4 3. Rf4 Rxg3 (3... Bxe4+ 4. Rxe4 Qc6 (
4... Rxg3 5. Rxe7+ Qxe7 6. hxg3 Qe4+ 7. Kg1 Nf3+ 8. Kf2 Ne5 9. Bf4) 5. Nf2 Nxc2
(5... f5 6. Qh5+ Rg6 7. cxd4 fxe4 8. d5 Qa4) 6. Rc1 Rg6 7. Qf3) 4. cxd4 (4. Ng5
Rxg5 5. Bxg5 Bxe4+ 6. Rxe4 Qc6 7. Qg4 f5 8. Qh5+ Kd7 9. Rae1) 4... Rxh3 5. Bg5
f6 (5... cxd4 6. Bxb7 Qxb7+ 7. Kg1) 6. Bh4 *

The sacrifice seems unsoud, and the simple 1...Rg6 seems even better !



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.