Author: Joachim Rang
Date: 11:23:19 10/05/05
Hi everybody, so here a detailed statement on the "history-pruning-bug": There is a bug at least in one version of the Fritz8-GUI (namely an update from September 9th 2005) which leads to the effect that Fruit plays with history and extended futility pruning disabled. That leads to a huge strength drop as some users reported. The bug happens if you open the Engine Properties windows and close it with "OK". After that Fritz always sends history pruning false to the engine regardless which option you choose. Even clicking on "Defaults" has no effect. However if you unload Fruit and load another engine and then reload history pruning should work - at least on my machine. So my advice: either don't use the latest update from September 9th or never touch the UCI-Parameters. ;-) I was just about to report that to Chessbase but in the meantime Matthias Feist has contacted me. I send him the engine, logs and description so I hope it will be ease for him to reproduce the bug. Whether Chessbase will provide a fix for an unofficial Beta-GUI I don't know. Hopefully it will be fixed in upcoming Updates. That it is for now, I don't believe in conspiracy (the update is from September 9th and Fruit came out September 29th, furthermore the bug does not occur with Fruit 2.1) but my belief that Chessbase finally has implemented a proper UCI-Support is shattered. Moreover fixing alien GUIs was not our intention when we decided to sell Fruit without its own GUI. ;-) Joachim
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