hoover_chess_utils::pgn_reader::Intercepts Class Reference

Check interceptions and pin checks. More...

#include <bitboard-intercepts.h>

Static Public Member Functions
static SquareSet	getInterceptSquares (Square kingSq, Square checkerSq) noexcept
	Returns the set of squares that intercepts a check.
static SquareSet	getRay (Square kingSq, Square pinnedSq) noexcept
	Returns a ray from king square to the direction of pinned piece square.
template<bool pinned>
static SquareSet	getPinRestiction (Square kingSq, Square pinnedSq) noexcept

Detailed Description

Check interceptions and pin checks.

Member Function Documentation

getInterceptSquares()

static SquareSet hoover_chess_utils::pgn_reader::Intercepts::getInterceptSquares ( Square  kingSq, Square  checkerSq  )

inlinestaticnoexcept

Returns the set of squares that intercepts a check.

Parameters

[in]	kingSq	King square
[in]	checkerSq	Checker square. May be Square::NONE.

Returns

The set of intercept squares or SquareSet::all() when the checker is Square::NONE.

The set of squares that intercept a check are:

• checkerSq (assume captured)
• If checkerSq is along a ray direction from kingSq, then all squares in between (but not including kingSq)

Illustration

	K
					C

Where:

• K = the checked king
• C = the checker
• shaded = the intercept squares

getPinRestiction()

template<bool pinned>

static SquareSet hoover_chess_utils::pgn_reader::Intercepts::getPinRestiction ( Square  kingSq, Square  pinnedSq  )

inlinestaticnoexcept

getRay()

static SquareSet hoover_chess_utils::pgn_reader::Intercepts::getRay ( Square  kingSq, Square  pinnedSq  )

inlinestaticnoexcept

Returns a ray from king square to the direction of pinned piece square.

Parameters

[in]	kingSq	King square
[in]	pinnedSq	Square of the pinned piece

Precondition

(Asserted) kingSq → pinnedSq must be on the same rank, file, diagonal, or anti-diagonal.

The ray represents the squares that are valid for a pinned piece, as pinned piece can only be moved along the pin axis.

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The documentation for this class was generated from the following file:

• pgn-reader/src/bitboard-intercepts.h