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Subject: Re: What does your program give for this tuff position?

Author: Brian Blanks

Date: 14:04:48 10/28/02

Go up one level in this thread

On my 1.06mhz, 256MB RAM machine:

I have analysis by both Fritz6 and CM9000:

Fritz 6 finds it immediately, then switches over to Qb2, and comes back to it
just over one minute later.

1.Rxd4--
  ³  (-0.69)   Depth: 1/3   00:00:00
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2!
  -+  (-2.37)   Depth: 6/14   00:00:00  9kN
1.Qb2! Qxa6 2.Qa2 Qa4 3.Rd3 Qd7
  µ  (-1.19)   Depth: 6/17   00:00:00  15kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Qd7 4.Bb2
  µ  (-1.06)   Depth: 7/17   00:00:00  29kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Rd7 4.Bc1 Qc6
  µ  (-0.97)   Depth: 8/17   00:00:00  58kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Nb3 4.Rc2 Rd7 5.Rb2
  µ  (-1.00)   Depth: 9/20   00:00:00  123kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rf1 Rd7 4.Ra1
  µ  (-1.22)   Depth: 10/25   00:00:00  298kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Qa5 4.Bc1 Qc3 5.Rd1 Rd7
  µ  (-1.03)   Depth: 11/26   00:00:01  843kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Nb3 4.Rc2 h6 5.Rc3 Nd4
  µ  (-1.12)   Depth: 12/27   00:00:02  1606kN
1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd2 Nb3 4.Rc2 f6 5.Rc3 Nd4
  µ  (-1.12)   Depth: 13/28   00:00:05  4138kN
1.Qb2 Qxa6 2.Qa2 f6 3.Kh2 fxe5 4.fxe5 Rf8 5.Re1 Qa4
  µ  (-1.19)   Depth: 14/32   00:00:15  11980kN
1.Qb2 Qxa6 2.Qa2 f6 3.Kh2 Qa5 4.Rf1 Qc3 5.Bb2 Qc2
  µ  (-1.22)   Depth: 15/35   00:00:56  45021kN
1.Rxd4!
  µ  (-1.19)   Depth: 15/35   00:01:06  53365kN
1.Rxd4! cxd4 2.c5 bxc5 3.Bxc5 d3 4.Kf2 Rd7 5.Bb4 Qc2+
  µ  (-1.12)   Depth: 15/35   00:01:09  56053kN
1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3 4.Kf2 Rd7 5.Bb4 Qc2+
  µ  (-1.00)   Depth: 16/35   00:01:26  70412kN
1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3 4.Kf2 Rd7 5.Bb4 Qc2+
  µ  (-1.09)   Depth: 17/39   00:02:16  112981kN


ChessMaster9000 seems to do even better "finding the sacrifice", and sticking
with it (but notice the evaluation is almost even):

Time	Depth	Score	Positions	Moves
0:00	1/6	-1.17	24144		1.Qb2 Qxa6 2.Qa2 Qa4 3.Re1 Rc8
0:00	1/7	-1.30	42878		1.Qb2 Qxa6 2.Qa2 Qa5 3.Rc1 Qa4
					4.Kh1 Qd7
0:00	1/7	-0.99	59065		1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3
					4.Be3 Qc3 5.Bxa7 Qe1+ 6.Kh2
0:01	1/8	-1.38	99268		1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3
					4.Kf2 d2 5.Ke2 Qa8 6.Qb7
0:01	1/8	-1.21	126774		1.Qb2 Qxa6 2.Qa2 Qa5 3.Rc1 Qa4
					4.Kh1 Qd7 5.Re1
0:02	1/9	-1.25	256542		1.Qb2 Qxa6 2.Qa2 Qa4 3.Rd3 a5 4.Qb1
					Qxc4 5.Qxb6 Rc8
0:05	2/10	-1.13	677229		1.Qb2 Qxa6 2.Qa2 Qa4 3.Ra1 a5 4.Rb1
					Qc6 5.Qb2 Rb8
0:08	2/10	-0.89	993799		1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3
					4.Kf2 f6 5.Ke3 Qa8 6.Qxd3 fxe5
					7.fxe5 Qxg2 8.Bxa7 Qxh3+ 9.Kd4
0:16	3/11	-0.89	2064480		1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3
					4.Kf2 f6 5.Ke3 fxe5 6.fxe5 Qa8
					7.Qxd3 Qxg2 8.Bxa7 Qxh3+ 9.Kd4
1:46	4/12	-0.04	13392070	1.Rxd4 cxd4 2.c5 bxc5 3.Bxc5 d3
					4.Kf2 Rd7 5.Ke3 Qe8 6.Qxd3 Qa8
					7.Qb5 Rd8

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