Author: Dieter Buerssner
Date: 21:40:01 03/07/02
Go up one level in this thread
On March 07, 2002 at 22:50:05, Robert Hyatt wrote: >On March 07, 2002 at 22:45:55, Dieter Buerssner wrote: > >> 5b1k/3R4/5P2/p1rB4/8/8/6K1/8 b - - >> >>Perhaps I am too naive, but when I watched this game, I first was confident, >>that it should be a very easy draw. My (stupid?) reasoning was: A computer will >>not lose KRBKR (when he does not see the exceptional win fast). The position >>here is KRBPKRBP. The Bs are of opposite color. So, I thought, it should allways >>be possible, to sac one B for a P, and have an easy draw. Well, I was totally >>wrong, and so was the knowledge I coded into my engine. >> >>How long does your engine need, to avoid a4? How long does it need, to see a >>convincing winning score after a4? (Kg3 is a forced win, other moves perhaps, >>too). >Crafty decides a4 is not so good pretty quickly (on my laptop here)... Yes. > 12-> 58.63 1.45 1. ... Rb5 2. Rd8 Kh7 3. Be4+ Kg8 4. > Rd7 Rb2+ 5. Kg3 Rb6 6. Bd5+ Kh8 7. > Rf7 Bc5 8. Kf4 a4 This will draw. >If you force a4 and let it search for white: > > 11-> 19.99 2.18 2. Kf3 Rc1 3. Kf4 Rf1+ 4. Kg5 Re1 5. > Kg6 Rg1+ 6. Kf7 Bc5 7. Rd8+ Kh7 8. > Be4+ Kh6 9. Ke6 While the score does not look too convincing yet, Kf3 will win. Thanks for all the answers. However, I'd also be interested in comments about the "knowledge" above. Was this just bad luck? Or is it just stupid to assume, that KRBPKRBP with Bs of opposite color should be draw? Regards, Dieter
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.