Author: Gerd Isenberg
Date: 05:14:56 10/06/03
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On October 05, 2003 at 13:43:33, Ricardo Gibert wrote: >There was a discussion about the value of playing oddball lines by amateur >programs to avoid the effective book lines of the stronger programs i.e. >http://www.talkchess.com/forums/1/message.html?319397. I thought about this a >little and a trick occurred to me that should work on most programs e.g. >Ruffian. > >The easiest way to explain it is to jump into some examples: > 1. e3 e5 2. e4 > 1. c3 e5 2. c4 > 1. d3 d5 2. d4 > 1. d3 e5 2. d4 > >What is this? Isn't White just dumping a tempo? Yes, but the idea is for white >to get the computer opponent out of book while retaining the advantage of >hundreds of years of opening theory for your own program! > >It can be carried out with 2 possible motives in mind: >1- Reach a playable middlegame with a huge time advantage on the clock. >2- Play a sharp gambit defense in reverse. This is the idea of 1.d3 e5 2. d4 >i.e. 2...exd4 3. Nf3 > >I would assume somebody has thought of this before and that some engines are >able to handle this easily. In fact, an engine that can't I would say has a bug >IMO. Which engines are able to cope with this trick effectively? My program handle it with w/b-mirrored zobrist keys. If opening book works like a persistant hashtable - that is easy to implement. And it matches all transpositions as well - eg. svechnikov with ...e5 Bg5 or ...e6 Bf4 e5 Bg5. Gerd
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