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Subject: Re: More information

Author: Andrew Williams

Date: 10:15:18 06/17/02

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On June 17, 2002 at 13:07:58, Andrew Williams wrote:

>On June 17, 2002 at 11:18:30, Art Basham wrote:
>
>>Here black (Botvinnik in 1940) played
>>...Rxh3+, then ...d4, etc.
>>
>>[D]5bk1/1p4p1/pP3p2/Pq1pn3/8/1r5P/RN1Br1P1/2QR3K b - -
>>
>>My computor is way too slow to find this one!
>>...Rxg2...? is not the correct move here...!
>
>PostModernist gets this in 0 seconds. It reports mate in 7 in 11 seconds, but
>the PV doesn't stretch to 7 moves :-(
>

That result was on an Athlon 1200. Analysis:

 6>   300     0     15004   1...Rxg2 2.Kxg2 Qe2 3.Kh1 Rxh3 4.Kg1 Nf3
 6b   396     0     27189   1...Rg3 2.Rg1 Qb3 3.Kh2 Rxh3
SCRUBBING TT (on new guess): 100        [509]   500
 6=   481     0     55491   1...Rg3 2.Ra4 Rexg2 3.Re1 Bc5
 7>   481     0     71386   1...Rg3 2.Ra4 Rexg2 3.Re1 Nd3
 7b   511     1    108014   1...Rxh3 2.gxh3 d4
SCRUBBING TT (on new guess): 281        [688]   681
 7=   882     1    157399   1...Rxh3 2.gxh3 d4 3.Kg1 Qd5 4.Qc4 Nxc4
                            5.Nxc4 Qxc4
 8>   882     1    161519   1...Rxh3 2.gxh3 d4 3.Kg1 Qd5 4.Qc4 Nxc4
                            5.Nxc4 Qg2
 8=   953     2    242099   1...Rxh3 2.gxh3 d4 3.Kg1 Qd5 4.Qc6 Nxc6
                            5.Raa1
 9>   953     2    254368   1...Rxh3 2.gxh3 d4 3.Kg1 Qd5 4.Qc6 Nxc6
                            5.Raa1 Qg2
SCRUBBING TT (on new guess): 753        [1157]  1153
 9=  +M07    12   1669131   1...Rxh3 2.gxh3 d4 3.Kg1 Qd5 4.Qc6 Nxc6
                            5.Raa1 Qg2
10>  +M07    13   1903883   1...Rxh3 2.gxh3 d4 3.Qc4 Nxc4 4.Rf1 Qd5
                            5.Rf3 Qxf3
10=  +M07    20   2942226   1...Rxh3 2.gxh3 d4 3.Qc4 Nxc4 4.Rf1 Qd5
                            5.Rf3 Qxf3
11>  +M07    20   2966028   1...Rxh3 2.gxh3 d4 3.Qc4 Nxc4 4.Rf1 Qd5
                            5.Rf3 Qxf3

Andrew



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