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Small clean-up 

Bench: 4321677
pull/3417/head
Stéphane Nicolet 2021-03-24 21:55:49 +01:00
parent c489df6f5b
commit b862c8d4be
5 changed files with 24 additions and 20 deletions
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2
AUTHORS
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@ -1,4 +1,4 @@
# List of authors for Stockfish, as of March 24, 2021
# List of authors for Stockfish, as of March 31, 2021
# Founders of the Stockfish project and fishtest infrastructure
Tord Romstad (romstad)

10
README.md
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@ -242,9 +242,9 @@ When not using the Makefile to compile (for instance, with Microsoft MSVC) you
need to manually set/unset some switches in the compiler command line; see
file *types.h* for a quick reference.
When reporting an issue or a bug, please tell us which version and
compiler you used to create your executable. These informations can
be found by typing the following commands in a console:
When reporting an issue or a bug, please tell us which Stockfish version
and which compiler you used to create your executable. This information
can be found by typing the following command in a console:
```
./stockfish compiler
@ -252,8 +252,8 @@ be found by typing the following commands in a console:
## Understanding the code base and participating in the project
Stockfish's improvement over the last couple of years has been a great
community effort. There are a few ways to help contribute to its growth.
Stockfish's improvement over the last decade has been a great community
effort. There are a few ways to help contribute to its growth.
### Donating hardware

2
src/bitboard.cpp
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@ -130,7 +130,7 @@ namespace {
for (Direction d : (pt == ROOK ? RookDirections : BishopDirections))
{
Square s = sq;
while(safe_destination(s, d) && !(occupied & s))
while (safe_destination(s, d) && !(occupied & s))
attacks |= (s += d);
}

3
src/bitboard.h
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@ -212,6 +212,7 @@ constexpr Bitboard adjacent_files_bb(Square s) {
inline Bitboard line_bb(Square s1, Square s2) {
assert(is_ok(s1) && is_ok(s2));
return LineBB[s1][s2];
}
@ -225,7 +226,9 @@ inline Bitboard line_bb(Square s1, Square s2) {
/// interpose itself to cover the check or capture the checking piece.
inline Bitboard between_bb(Square s1, Square s2) {
assert(is_ok(s1) && is_ok(s2));
return BetweenBB[s1][s2];
}

27
src/evaluate.cpp
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@ -256,12 +256,12 @@ namespace {
S(0, 0), S(3, 44), S(37, 68), S(42, 60), S(0, 39), S(58, 43)
};
constexpr Value CorneredBishop = Value(50);
// Assorted bonuses and penalties
constexpr Score UncontestedOutpost = S( 1, 10);
constexpr Score BishopOnKingRing = S( 24, 0);
constexpr Score BishopXRayPawns = S( 4, 5);
constexpr Value CorneredBishopV = Value(50);
constexpr Score CorneredBishop = S(CorneredBishopV, CorneredBishopV);
constexpr Score FlankAttacks = S( 8, 0);
constexpr Score Hanging = S( 69, 36);
constexpr Score KnightOnQueen = S( 16, 11);
@ -478,8 +478,8 @@ namespace {
{
Direction d = pawn_push(Us) + (file_of(s) == FILE_A ? EAST : WEST);
if (pos.piece_on(s + d) == make_piece(Us, PAWN))
score -= !pos.empty(s + d + pawn_push(Us)) ? CorneredBishop * 4
: CorneredBishop * 3;
score -= !pos.empty(s + d + pawn_push(Us)) ? 4 * make_score(CorneredBishop, CorneredBishop)
: 3 * make_score(CorneredBishop, CorneredBishop);
}
}
}
@ -1052,23 +1052,23 @@ make_v:
if ( pos.piece_on(SQ_A1) == W_BISHOP
&& pos.piece_on(SQ_B2) == W_PAWN)
correction += !pos.empty(SQ_B3) ? -CorneredBishopV * 4
: -CorneredBishopV * 3;
correction += !pos.empty(SQ_B3) ? -CorneredBishop * 4
: -CorneredBishop * 3;
if ( pos.piece_on(SQ_H1) == W_BISHOP
&& pos.piece_on(SQ_G2) == W_PAWN)
correction += !pos.empty(SQ_G3) ? -CorneredBishopV * 4
: -CorneredBishopV * 3;
correction += !pos.empty(SQ_G3) ? -CorneredBishop * 4
: -CorneredBishop * 3;
if ( pos.piece_on(SQ_A8) == B_BISHOP
&& pos.piece_on(SQ_B7) == B_PAWN)
correction += !pos.empty(SQ_B6) ? CorneredBishopV * 4
: CorneredBishopV * 3;
correction += !pos.empty(SQ_B6) ? CorneredBishop * 4
: CorneredBishop * 3;
if ( pos.piece_on(SQ_H8) == B_BISHOP
&& pos.piece_on(SQ_G7) == B_PAWN)
correction += !pos.empty(SQ_G6) ? CorneredBishopV * 4
: CorneredBishopV * 3;
correction += !pos.empty(SQ_G6) ? CorneredBishop * 4
: CorneredBishop * 3;
return pos.side_to_move() == WHITE ? Value(correction)
: -Value(correction);
@ -1119,7 +1119,8 @@ Value Eval::evaluate(const Position& pos) {
// If the classical eval is small and imbalance large, use NNUE nevertheless.
// For the case of opposite colored bishops, switch to NNUE eval with
// small probability if the classical eval is less than the threshold.
if ( largePsq && !strongClassical
if ( largePsq
&& !strongClassical
&& ( abs(v) * 16 < NNUEThreshold2 * r50
|| ( pos.opposite_bishops()
&& abs(v) * 16 < (NNUEThreshold1 + pos.non_pawn_material() / 64) * r50