lucasart wrote:Be careful when looking at stopped results, because they are biaised.
Yes. Indirectly has been tested more since I made another test with faster tc before, but with another version, and it also had a very little positive win.
PK wrote:I decided to test this idea overnight.
Beside that, I printed a couple of positions where non-capturing hash move is tried in quiescence search. Most of the time these are moves that improve static score significantly: castling, central pawn pushes (including well-prepared d3-d4 in the middlegame), rook to 7th rank, increasing the number of pieces attacking enemy king. There were piece escpes, but much less than I thought. As a bit of surprise there came a fair share of moves attacking enemy queen or offering queen trade.
It seems that using hash moves in quiesce might act as a very cost-effective replacement of a move generator spitting out potential gainers.
unfortunately for me it seems a narrow miss (48,8%). One reason might be that Rodent already bumps up a capture that is a hash move, but many things may depend on implementation details (depth limit etc.).
