Author: John Merlino
Date: 12:56:02 02/15/01
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On February 15, 2001 at 12:37:52, José Antônio Fabiano Mendes wrote: > Botvinnik-Tal,1960,game 12 > [D]8/1Q3pkp/4q2r/3p2p1/3Pr3/P5P1/3R1P1P/5RK1 b > And here Tal played 31...Re1 but 31...Reh4 > "should have won".Is that true? JAFM > Source: http://www.mark-weeks.com/chess/60tb$$.htm CM8000 finds Reh4 immediately, and takes 2 seconds to see that it's winning: Time Depth Score Positions Moves 0:00 2/5 0.00 14076 1... Reh4 2. gxh4 Qg4+ 3. Kh1 Qf3+ 4. Kg1 Qg4+ 0:00 2/6 0.00 37556 1... Reh4 2. gxh4 Qg4+ 3. Kh1 Qf3+ 4. Kg1 Qg4+ 0:02 3/7 -1.21 195927 1... Reh4 2. f3 Qe3+ 3. Kh1 Qxd2 4. gxh4 Rxh4 5. Qb8 Rxd4 6. Qe5+ f6 7. Qc7+ Kg6 0:04 3/8 -1.16 418954 1... Reh4 2. f3 Qe3+ 3. Kh1 Qxd2 4. gxh4 Rxh4 5. Qb8 Qxd4 6. Qd8 Kg6 7. a4 0:12 4/9 -1.59 1168449 1... Reh4 2. f3 Qe3+ 3. Kh1 Qxd2 4. gxh4 Qe2 5. Rg1 Qxf3+ 6. Rg2 Re6 7. Qb1 Re2 8. Qg1 1:03 5/10 -1.76 6173213 1... Reh4 2. f3 Qe3+ 3. Kh1 Qxd2 4. gxh4 Qe2 5. Rg1 Qxf3+ 6. Rg2 Rxh4 7. Qe7 Rg4 8. Qe2 Qxe2 9. Rxe2 Rxd4 However, CM8000 doesn't necessarily think that Re1 is losing. It just doesn't win. Time Depth Score Positions Moves 0:00 1/4 0.67 8977 2. a4 Qe4 3. h4 gxh4 0:00 2/6 0.72 60107 2. Qb5 Qh3 3. f4 Rb6 4. Qd3 Rxf1+ 5. Qxf1 Qxf1+ 6. Kxf1 gxf4 7. gxf4 0:01 3/7 0.58 146243 2. Qb5 Qh3 3. f4 Rxf1+ 4. Qxf1 Qxf1+ 5. Kxf1 gxf4 6. gxf4 Rf6 7. Rg2+ Kf8 8. Rg4 Ke7 0:03 3/8 0.46 316499 2. Qb5 Qh3 3. f4 Rb6 4. Qd3 Rbb1 5. Rf2 Rxf1+ 6. Rxf1 Rb2 7. Rf2 Rxf2 8. Kxf2 Qxh2+ 9. Kf3 0:09 4/9 0.32 846481 2. Qb5 Qh3 3. f4 Rb6 4. Qd3 Rbb1 5. Rf2 Rxf1+ 6. Rxf1 Rb2 7. Rf2 Rxf2 8. Kxf2 Qxh2+ 9. Kf3 Qh1+ 10. Kg4 0:46 5/10 0.31 4198967 2. Qb5 Qh3 3. f4 Rb6 4. Qd3 Rbb1 5. Rf2 Rxf1+ 6. Rxf1 Rb2 7. Rf2 Rxf2 8. Kxf2 Qxh2+ 9. Kf3 Qh1+ 10. Ke2 gxf4 2:22 6/11 -0.21 13302279 2. Qb5 Qh3 3. f4 Rb6 4. Qd3 Rbb1 5. Rxe1 Rxe1+ 6. Kf2 Ra1 7. fxg5 Qxh2+ 8. Kf3 Rxa3 9. Qxa3 Qxd2 10. Qe3 Qd1+ 11. Kf2 Qh1 11:06 6/11 0.00 61418531 2. Qc7 Rxf1+ 3. Kxf1 Qh3+ 4. Ke1 Re6+ 5. Re2 Rxe2+ 6. Kxe2 Qg4+ 7. Kd3 Qd1+ 8. Ke3 Qb3+ 9. Ke2 Qb2+ 10. Kd3 Qxa3+ 11. Ke2 Qa6+ 12. Kd2 Qa2+ 13. Kd3 Qb3+ 14. Qc3 Qd1+ 15. Qd2 Qg4 jm
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