|
|
r4rk1/pp1n1p1p/1nqP2p1/2b1P1B1/4NQ2/1B3P2/PP2K2P/2R5 w - - 0 1 Nolot's analysis as reported by Baudot: Bronstein - Ljubojevic, Petropolis itz 1973 22.Rxc5!! Nxc5 23.Nf6+ Kh8 24.Qh4 Qb5+ (Now computers have a problem here : they think there is perpetual check, but...) 25.Ke3! wins 25... h5 26.Nxh5 Qxb3+ and Bronstein won in 41 moves. If black plays 26... Nd5+ 27.Bxd5 Qd3 28.Kf2 Ne4+ 29.Bxe4 Qd4+ 30.Kg2 Qxb2+ 31.Kh3 +- The best programs should be able to find 25.Rxc5!! in a few weeks. Comments by Feng-Hsiung Hsu: Solution is 1. Rc5! Nc5 2. Nf6 Kh8 3. Qh4... Solved under tournament time control (3 minutes/move, plus extra time if the value for the move is unstable). Plays it after 2 minutes. Actually spent 4.5 minutes before the value stabilized to about a piece up. My own experience: Ferret finds this in as little as fifteen seconds on a Dual AMD 1.2 ghz machine. The score is initially negative, but rises to plus several pawns in a few minutes, sometimes less. The positions seems to be sensitive to extensions. |
Send mail to
brucemo@seanet.com with
questions or comments about this web site.
|