kate/BadFish
1
0
Fork 0
mirror of https://github.com/sockspls/badfish synced 2025-04-29 16:23:09 +00:00
Code Issues Releases Wiki Activity

Halve StormDanger bonus for blocked pawn on A/H file

Browse source 
STC
LLR: 2.95 (-2.94,2.94) [-1.50,4.50]
Total: 3410 W: 758 L: 641 D: 2011

LTC
LLR: 2.95 (-2.94,2.94) [0.00,6.00]
Total: 33225 W: 5708 L: 5445 D: 22072

Bench: 8465811

Resolves #153
This commit is contained in:
joergoster 2014-12-11 13:06:03 -05:00 • committed by Gary Linscott
parent afafdf7b73
commit f6d220ab14
1 changed files with 10 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

16
src/pawns.cpp
View file

@ -65,11 +65,14 @@ namespace {
{ V(100), V(0), V(27), V(73), V(92), V(101), V(101) };
// Danger of enemy pawns moving toward our king indexed by
// [no friendly pawn | pawn unblocked | pawn blocked][rank of enemy pawn]
const Value StormDanger[][RANK_NB] = {
{ V( 0), V(64), V(128), V(51), V(26) },
{ V(26), V(32), V( 96), V(38), V(20) },
{ V( 0), V( 0), V(160), V(25), V(13) } };
// [edge files][no friendly pawn | pawn unblocked | pawn blocked][rank of enemy pawn]
const Value StormDanger[][3][RANK_NB] = {
{ { V( 0), V(64), V(128), V(51), V(26) },
{ V(26), V(32), V( 96), V(38), V(20) },
{ V( 0), V( 0), V(160), V(25), V(13) } },
{ { V( 0), V(64), V(128), V(51), V(26) },
{ V(26), V(32), V( 96), V(38), V(20) },
{ V( 0), V( 0), V( 80), V(13), V( 7) } } };
// Max bonus for king safety. Corresponds to start position with all the pawns
// in front of the king and no enemy pawn on the horizon.
@ -252,7 +255,8 @@ Value Entry::shelter_storm(const Position& pos, Square ksq) {
safety += 200;
else
safety -= ShelterWeakness[rkUs]
+ StormDanger[rkUs == RANK_1 ? 0 :
+ StormDanger[f == FILE_A || f == FILE_H]
[rkUs == RANK_1 ? 0 :
rkThem != rkUs + 1 ? 1 : 2][rkThem];
}