Author: Vincent Diepeveen
Date: 20:44:40 07/06/00
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On July 06, 2000 at 21:27:00, Dann Corbit wrote: >On July 06, 2000 at 19:41:31, Vincent Diepeveen wrote: > >>Hello, >> >>this is a post i just did at crafty list after a long number of mails about >>a project called CAP which people tend to believe they can use it for >>creating their openingsbook. Some warnings are on their place, when you >>want to let such a book compete with commercial books. >> >>I first showed that CAP goes completely wrong already quite soon in opening. >>Like 1.d4,d5 2.c4,e5 3.dxe5 there best move is d4 all other moves you can >>go home and rest but first resign the game. > >And (as I showed in the Crafty mailing list) CAP supports this choice. quote from your email: ------ > > 1.d4,d5 2.c4,e5 3.dxe5 then what does your CAP play? dxc4 ------ You answered dxc4 BEEP wrong answer. Now you say suddenly it does play d4. However you are faced with a big problem here. Program's choice. Some programs like d4, most will never play d4. Which one to trust? >>material inequality. But now please check cap scores for the next >>opening: >> >>1.e4,e5 2.Nf3,Nc6 3.Bb5,a6 4.Ba4,Nf6 5.O-O,b5 > >r1bqkb1r/2pp1ppp/p1n2n2/1p2p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq b6 acd 14; acn >101711325; ce 19; pv Bb3 Bd6 d3 Na5 Bg5 Nxb3 axb3 O-O Nc3 c6 d4 Qe7 Nxe5 Bxe5 >dxe5 Qxe5; pm Bb3; id "C.A.P. 442898"; > >Here is the CAP record for the ending position. I'm sure you have some point to >make, but I have no idea what it is. > >Nobody said to throw out all the data for your opening books and use CAP data >instead. On the other hand, it seems to make crafty play better (been using it >since version 17.0). > >Just use the CAP scores as an additional resource. What you do with the CAP >data is up to you. If you want to over rule 500 GM's with it, you are on shaky >ground. But if there is little else to choose from, it is likely not a bad >answer. > >Here is what you will know: >Within the depth specified by acd, there are no technical snares leading to >score worse that ce (or possibly you may find a hidden tactical trick). > >I have no presumption that chess programs can think strategically given 12 >minutes, or that they understand positional moves. > >I think the CAP data is a supplement, not a replacement. I also think that >someday it actually may replace human calculated books, but that day is not here >yet. > >When have I ever said otherwise?
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