MaxM wrote: > Hi, > > an interesting new feature of wine 1.2 is it's 64-bit support. Many Windows chess engines gain about 50-80% speed increase when running at 64-bit. Most provide 32-bit and 64-bit engines. But on my 64-bit Ubuntu 10.04 only an error message appears i.e. with the free Stockfish 1.8. Why are you running these chess engines and viewers under Wine? Most of these are available as native Linux programs.