Has Rybka 3 restored the Rooks Pawn + wrong-color Bishop knowledge that was taken out around Rybka 2.3.*?
No, this is also missing from Rybka 3. Tablebases can patch the problem. When I play games with persistent hash enabled, Rybka often moves instantly, even when it seems inappropriate given the current “Persistent Hash Play Depth”. Rybka wrongly uses the “Write Depth” instead of the “Play Depth” to decide when to move instantly during game play. We suggest that you disable the persistent hash during game play. If you’d like to explore a more sophisticated solution, you can also do one of the following: a) Play games with the persistent hash as normal and accept some inappropriate fast moves. This may hurt game-play results, but will give the benefit of filling the persistent hash for future use. b) Set the persistent hash “Write Depth” to some value which is a function of the time control and hardware so that a reasonable compromise is reached between writing enough useful data to the persistent hash while not playing too many instant moves. Persistent hash merging and resizing does not
