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Subject: Re: Can programs find the Lasker move? (Bxa6!!)

Author: John Merlino

Date: 22:58:45 08/28/02

Go up one level in this thread

On August 28, 2002 at 23:03:19, Tanya Deborah wrote:

>
>Hi CCC!
>
>Look the 17. Lasker move (Bxa6!!)
>
>Great game!  Any program  can find this move?
>
>
>
>
>Lasker - Marshall  (1914 St Petesburgo)
>
>1. e4   e5
>2. Nf3  Nf6
>3. Nxe5 d6
>4. Nf3  Nxe4
>5. Qe2  Qe7
>6. d3   Nf6
>7. Bg5  Be6
>8. Nc3  Nbd7
>9. O-O-O h6
>10. Bh4 g5
>11. Bg3 Nh5
>12. d4  Nxg3
>13. hxg3 g4
>14. Nh4 d5
>15. Qb5 O-O-O
>16. Qa5 a6
>17. Bxa6 bxa6
>18. Qxa6+ Kb8
>19. Nb5 Nb6
>20. Rd3 Qg5+
>21. Kb1 Bd6
>22. Rb3 Rhe8
>23. a4  Bf5
>24. Na7 Bd7
>25. a5  Qd2
>26. axb6 Re1+
>27. Ka2 c6
>28. Nb5 cxb5
>29. Qa7+
>
>There are a good defence for Black after 17.Bxa6! ? Some programs seems really
>advantage for White after this move.

Chessmaster 9000, on a PIII-733, finds the move in less than one second.
However, it takes 2:54 before it thinks that White has an slight advantage:

Time	Depth	Score	Positions	Moves
0:00	1/3	-0.95	2267		1.Kb1 Qb4 2.Qxb4 Bxb4
0:00	1/3	-0.71	3663		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Kb1 Nb6
					4.Rhe1
0:00	1/3	-0.69	6770		1.Bd3 Qb4 2.Qxb4 Bxb4
0:00	1/4	-0.79	10723		1.Bd3 Qf6 2.f4 Nb6 3.Ne2
0:00	1/4	-0.57	14727		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Qa7+ Kc8 5.Rhe1 Qg5+ 6.Kb1 Bd6
					7.Nxd6+ Rxd6
0:00	1/5	-0.38	38374		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Qa7+ Kc8 5.Rhe1 Qg5+ 6.Kb1 Bd6
					7.Qa6+ Kd7 8.Nxd6 Kxd6
0:01	1/6	-0.38	113368		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Qa7+ Kc8 5.Rhe1 Qg5+ 6.Kb1 Bd6
					7.Qa6+ Kd7 8.Nxd6 Kxd6
0:04	1/7	-0.44	342200		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Rhe1 Qg5+ 5.Kb1 Nc8 6.f4 Qf6
					7.Qa5 Rd7
0:10	1/8	-0.38	807098		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Rhe1 Nc8 5.f4 Qf6 6.Qa5 Bd6 7.Nxd6
					Nxd6
0:33	1/9	-0.09	2790187		1.Bxa6 bxa6 2.Qxa6+ Kb8 3.Nb5 Nb6
					4.Rhe1 Qg5+ 5.Kb1 Nc8 6.f4 Qg7
					7.Qa5 Rd7 8.f5
2:54	1/10	0.21	14196874	1.Bxa6 Qf6 2.f4 Nb6 3.f5 Bxf5 4.Nxf5
					Qxf5 5.Bd3 Qg5+ 6.Kb1 Bg7 7.Nb5
					Rhe8
4:55	2/11	0.12	24516554	1.Bxa6 Nb6 2.Bb5 Kb8 3.Ne2 Qf6
					4.Nf4 Bd6 5.Nxe6 fxe6 6.Qd2 Rhf8

jm

• Re: Can programs find the Lasker move? (Bxa6!!) Vincent Lejeune 01:17:00 08/29/02
  • Re: Can programs find the Lasker move? (Bxa6!!) Ulrich Tuerke 13:06:46 08/29/02
  • Re: Can programs find the Lasker move? (Bxa6!!) John Merlino 11:44:19 08/29/02

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