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Subject: Re: ECM973

Author: Tord Romstad

Date: 07:53:23 11/04/03

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On November 04, 2003 at 10:17:31, martin fierz wrote:

>thanks for the link! i thought GCP had helped work on ECM98, so i thought these
>two were the same... but i see that ECMGCP is much smaller than ECM98. perhaps
>it's also got the easier positions removed.

Perhaps.  There are 183 positions, most of which are moderately hard.  It has
become my favorite tactical testsuite lately, as WAC is a bit too easy on
modern hardware.  ECMGCP is hard enough to keep it interesting, but not hard
enough to make me completely depressed about the number of solutions found.
My latest version scores 132/183 with 10 seconds/position on an Athlon 2.0 GHz.
The hard ones are:

949, 952, 973, 986, 987, 1020, 1053, 1066, 1080, 1084, 1085, 1093,
1176, 1204, 1229, 1265, 1267, 1270, 1274, 1277, 1281, 1304, 1308,
1317, 1325, 1332, 1335, 1340, 1376, 1377, 1381, 1383, 1394, 1403,
1426, 1438, 1439, 1448, 1536, 1547, 1551, 1553, 1554, 1573, 1592,
1601, 1604, 1612, 1617, 1621, 1622.

Tord





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