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1r1bk2r/2R2ppp/p3p3/1b2P2q/4QP2/4N3/1B4PP/3R2K1 w k - 0 1 Nolot's analysis as reported by Baudot: Todorovic - Tosic, Arandjelovac, 1993. A nice exchange sacrifice to keep control of the 7th rank : 1.Rxd8+!! Rxd8 (if 1...Kxd8 2.Ra7! Qe2 3.Qd4+ e8 4.h3 Qe1+ 5.Kh2 Rd8 6.Qc5 Qh4 7.Ba3 Rd7 8.Ra8+ Rd8 9.g3 1-0) 2.Ba3 Qe2 3.h3! Bd7 (better but still losing was 3...Qe1+ 4.Kh2 Qa5 5.Re7+ Kf8 6.Rd7+ Kg8 7.Bb4 Rxd7 8.Bxa5 +-) 4.Nf5! Qd1+ 5.Kh2 f6 6.e5xf6 1-0 Genius 2 does better than the R30 on this one, but needs more than a month to find 1.Rxd8!! even on a 90 MHz Pentium. Comments by Feng-Hsiung Hsu: This one we left the machine ran overnight. It found that 1. Rd8! wins. 1. Rd8! Kd8 2. Ra7 and if 2. ... Qe2 3. Qd4 Ke8 4. h3... Took 12 hours to get the value back, but would have played it if the time control is 6 hours/move. My own experience: I ran this one on a quad 450 mhz Xeon. Ferret finds this with a negative score after 25 minutes. It takes about a day to hit +1, and 37 hours to hit +2.3. So apparently this one is solved by my program. |
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