Author: Paul
Date: 16:15:19 10/05/01
Go up one level in this thread
On October 05, 2001 at 14:59:28, Robert Hyatt wrote: >On October 05, 2001 at 12:33:06, José Carlos wrote: > >> Due to recent posts about SEE, I've decided to implement it. I have a doubt. >>In this position: >> >>[D]6rk/3n4/6p1/8/8/3B4/P2R4/7K w - - 0 1 >> >> white has only a capture: Bxg6. If I understood right, SEE looks only for >>captures in one square, so it will try: Bxg6 Rxg6 and I'm losing a bishop for a >>pawn. So SEE will tell me Bxg6 loses, and I'll discard a move that actually >>gives me a pawn for free. Is this correct? >> >> José C. > > >That is correct. But notice this is only "discarded" somewhere in the >q-search (in my case.) I _never_ throw moves out in the normal search. >This will be searched near the end, because it looks like it loses a >piece for a pawn. But it _will_ be searched. The q-search will be wrong. >But then it is possible that your RxN can't be played either because your >rook might be pinned. That gets too complicated for this kind of simple/static >analysis... > >The q-search is _full_ of errors, because it is by definition not exhaustive >at all. Which means it overlooks pins. forks, skewers, etc already. What's >one more small error tree in that forest? :) Bob, could you explain what you mean by 'it overlooks pins'? Groetjes, Paul
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.