Thanks for considering.zamar wrote:Issue #2 is just normal behaviour.
Issue #1 is a real issue though. I've recorded it in our issue tracker:
https://github.com/official-stockfish/S ... issues/544
It's not of high priority, because position is highly artificial, but we'll fix it at some point...
Thanks for reporting.
The "artificial" position is from a CCRL 40/4 game. (GrayMatter SVN1604 vs POS 1.20, date 2012-07-16). I have stockfish hangups in other positions as well. This is just the first.
Background: I use low-depth searches (depth 1 and 2 currently) for a comparative evaluation study I'm conducting. (An extension of "Texel's tuning method".) These two problems disqualify the recent stockfishes from my experiments. The bad values because of the injected noise. The infinite loop because it takes too long. The workaround is to use an old version and that is ok, but it would be nice to have results with a modern stockfish. I might patch the pruning near tips of the PV myself one day. The resulting evaluations are just wrong.