HCha/Stockfish
1
0
Fork 0
mirror of https://github.com/HChaZZY/Stockfish.git synced 2025-12-22 01:56:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

small cleanups

Browse Source 
closes https://github.com/official-stockfish/Stockfish/pull/2695

No functional change
This commit is contained in:
Joost VandeVondele
2020-06-21 15:21:46 +02:00
parent bc3c215490
commit 6f15e7fab2
14 changed files with 50 additions and 61 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/evaluate.cpp
View File

@@ -676,16 +676,15 @@ namespace {
}
// Evaluation::space() computes the space evaluation for a given side. The
// space evaluation is a simple bonus based on the number of safe squares
// available for minor pieces on the central four files on ranks 2--4. Safe
// squares one, two or three squares behind a friendly pawn are counted
// twice. Finally, the space bonus is multiplied by a weight. The aim is to
// improve play on game opening.
// Evaluation::space() computes a space evaluation for a given side, aiming to improve game
// play in the opening. It is based on the number of safe squares on the 4 central files
// on ranks 2 to 4. Completely safe squares behind a friendly pawn are counted twice.
// Finally, the space bonus is multiplied by a weight which decreases according to occupancy.
template<Tracing T> template<Color Us>
Score Evaluation<T>::space() const {
// Early exit if, for example, both queens or 6 minor pieces have been exchanged
if (pos.non_pawn_material() < SpaceThreshold)
return SCORE_ZERO;