This is what I have found out so far, as the quality of the opening books are created from games of players that are rated lower than rybka 232a, and as you see some opening books are so inferior that the quality is worse than a player rated 1400. Even if we use a great opening book like Rybka.abk sometimes the level of play by Rybka 232a without an opening is not worse than by using a great opening book.
PS: Here is my experiment:
I wonder how much benefit Rybka gets from using an opening book, next 40 games i will test Rybka 232.a (without an Opening Book) vs Cyclone xTreme.
Engine Score Ry Cy S-B
1: Rybka v2.3.2a.w32 25.5/40 ········································ 0=1=11=1=10=111111==0100=01====11111===0 369.75
2: Cyclone xTreme 14.5/40 1=0=00=0=01=000000==1011=10====00000===1 ········································ 369.75
40 games played / Tournament is finished
Name of the tournament: Arena tournament
Site/ Country: Jorge-07E2FB46AF, United States
Level: Tournament Game in 5 Minutes
Hardware: AMD Athlon(TM) XP 2000+ 1662 MHz with 992 MB Memory
Operating system: Microsoft Windows XP Home Edition Service Pack 3 (Build 2600)
PGN-File: C:\Program Files\Arena\Arena.pgn
Website:
E-Mail Address:
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This is what I have found so far to my surprise. These previous 40 games were played with both engines using Rybka.abk. But I always thought that Opening books were a collection of openings from players that are rated lower than Rybka 232a. Which prompt me to make an experiment. What if Rybka 232a play without an Opening book to see if it scores higher than with a good opening book like Rybka.abk, well here is the answer Rybka without an opening book is scoring as good as using an opening book.
Engine Score Ry Cy S-B
1: Rybka v2.3.2a.w32 26.0/40 ········································ =====100=11===0111=011101111111=101110=0 364.00
2: Cyclone xTreme 14.0/40 =====011=00===1000=100010000000=010001=1 ········································ 364.00
40 games played / Tournament is finished
Name of the tournament: Arena tournament
Site/ Country: Jorge-07E2FB46AF, United States
Level: Tournament Game in 5 Minutes
Hardware: AMD Athlon(TM) XP 2000+ 1662 MHz with 992 MB Memory
Operating system: Microsoft Windows XP Home Edition Service Pack 3 (Build 2600)
PGN-File: C:\Program Files\Arena\Books\arena.pgn
Website:
E-Mail Address:
Therefore, my recommendation is not to use an opening books for engines that do not have a better opening book than Rybka.abk as the game between Bright vs Cyclone
