Author: John Merlino
Date: 13:18:05 03/12/01
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On March 12, 2001 at 15:20:00, Brian Kostick wrote: >On March 12, 2001 at 12:32:29, John Merlino wrote: > >>On March 12, 2001 at 00:08:28, Daniel Chancey wrote: >> >>>Capablanca-Alekhine Capa played 1.f4 Alekhine responded 1...e5 That is >>>insane! >>> >>>The next version of the CM AVRO tournament will use modified CM books so that >>>the opening moves make more sense. >>> >>>Castle2000 >> >>Why is this "insane"? It's called From's Gambit to Bird's Opening. After >> >>1.f4 e5 >>2.fxe5 d6 >>3.exd6 Bxd6 >>4.Nf3 Nf6 >> >>it is certainly not losing for Black. Out of 21 games in the CM database, it's >>+10 =4 -7. There's even a game where an IM beat a GM with it (Malaniuk v >>Dyachkov -- Maikop, June 1998). >> >>If you can find a game where Alekhine played Black against 1.f4, let me know, >>because there aren't any that I can find. >> >>jm > > I think Daniel intended to point out 1.f4 as a rather rare opening move for >Capablanca. My unscientific look showed 13/654 or about 2% chance. 1.f4 is >weighted the same as 1.c4 in this book, so I see we are compromising at best. >Also I think 1.b4 in CapablancaJR.obk is not worthy of weight. I only found 2 of >these games out of the 654. Regards, Brian K. > >Where I looked: >http://www.chesslab.com/PositionSearch.html I will make sure that the development team should update the GM books when they get a chance (which may be quite some time). The way the math works for the Capablanca book is as follows: d4 = 100 weight e4 = 50 weight Nf3, f4, c4 and b4 are all 25 weight So, d4 is chosen about 40% of the time, e4 about 20%, and the others are all about 10%. I think the f4 weighting is probably reasonable, but you're probably right about b4 (but that would just make f4 more common!). However, that website is pretty cool! Is there some display of the total number of games found for each search, or do you have to keep pressing "Next" until you reach the end of the list? jm
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