Author: Ed Schröder
Date: 00:08:49 12/16/97
After my own research and some emails with SSDF I can report the following concerning the "main book=off" topic. One SSDF tester unintentional turned off the Rebel8/9 main book. Surprisingly the error was restricted to only REBEL matches! After extensive research from Jeroen and myself I can report that only the following matches were infected: - Rebel8 (P90) - Rebel9 (P90) - Rebel9 (P200-MMX) This seems to fit my initial posting about this topic in which I posted 6 examples which were all games between Rebel versions. Although I have seen much more cases where the "main book=off" played its role I can safely say now that the damage is limited to +15 / -15 elo points which is not much. This because of the "similarity" between the Rebel8 and Rebel9 tournament books. Against other programs the "main book=off" could have been quite dramatic. Since only Rebel - Rebel matches are involved the +15 / -15 is honestly divided in the Rebel8 / Rebel9 family. Thoralf reported that after removing the Rebel-Rebel matches in question R9-200MMX would go down 15 points and the R9-P90 would go up 17 points. The question remains of course what would have happened if the Rebel- Rebel matches were played with the good settings. For Jeroen and me the matter is closed now, I can live with the above whether SSDF removes the Rebel matches in question or not. I now finally can update to the new SSDF list on the Rebel Home Page and shortly comment in similar wordings as above. - Ed Schroder -
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