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[BitBoard] Add kingAttacks method

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This commit is contained in:
Arthur Bols
2022-12-22 11:39:00 +01:00
parent 4157c9200e
commit db23a4c610
2 changed files with 11 additions and 0 deletions
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9
BitBoard.cpp
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@@ -51,3 +51,12 @@ BitBoard BitBoard::southFill() const {
BitBoard BitBoard::fileFill() const { BitBoard BitBoard::fileFill() const {
return northFill() | southFill(); return northFill() | southFill();
} }
BitBoard BitBoard::kingAttacks(const BitBoard bb) {
BitBoard result = bb.east() | bb.west() | bb;
result |= (result.north() | result.south());
result ^= bb;
return result;
}

2
BitBoard.h
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@@ -95,6 +95,8 @@ public:
BitBoard southFill() const; BitBoard southFill() const;
BitBoard fileFill() const; BitBoard fileFill() const;
static BitBoard kingAttacks(BitBoard bb);
static BitBoard fromIndex(unsigned i); static BitBoard fromIndex(unsigned i);
static BitBoard getRank(int r); static BitBoard getRank(int r);