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Reformat connected_moves()

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Prepare code for the next patch that
will affect functionality.

No functional change.
This commit is contained in:
Marco Costalba 2012-11-03 12:57:07 +01:00
parent 52f55179a8
commit ed1574e46c
1 changed files with 15 additions and 25 deletions
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40
src/search.cpp
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@ -1365,40 +1365,30 @@ split_point_start: // At split points actual search starts from here
bool connected_moves(const Position& pos, Move m1, Move m2) {
Square f1, t1, f2, t2;
Piece p1, p2;
Square ksq;
assert(is_ok(m1));
assert(is_ok(m2));
// Case 1: The moving piece is the same in both moves
f2 = from_sq(m2);
t1 = to_sq(m1);
if (f2 == t1)
Square t1 = to_sq(m1);
Square f1 = from_sq(m1);
Square t2 = to_sq(m2);
Square f2 = from_sq(m2);
// The moving piece is the same or its destination square was vacated by m1
if (t1 == f2 || t2 == f1)
return true;
// Case 2: The destination square for m2 was vacated by m1
t2 = to_sq(m2);
f1 = from_sq(m1);
if (t2 == f1)
return true;
// Case 3: Moving through the vacated square
p2 = pos.piece_on(f2);
if (piece_is_slider(p2) && (between_bb(f2, t2) & f1))
// Moving through the vacated square
if (piece_is_slider(pos.piece_on(f2)) && (between_bb(f2, t2) & f1))
return true;
// Case 4: The destination square for m2 is defended by the moving piece in m1
p1 = pos.piece_on(t1);
if (pos.attacks_from(p1, t1, pos.pieces() ^ f2) & t2)
// The destination square for m2 is defended by the moving piece in m1
Bitboard t1_att = pos.attacks_from(pos.piece_on(t1), t1, pos.pieces() ^ f2);
if (t1_att & t2)
return true;
// Case 5: Discovered check, checking piece is the piece moved in m1
ksq = pos.king_square(pos.side_to_move());
if ( piece_is_slider(p1)
&& (between_bb(t1, ksq) & f2)
&& (pos.attacks_from(p1, t1, pos.pieces() ^ f2) & ksq))
// Discovered check, checking piece is the piece moved in m1
Square ksq = pos.king_square(pos.side_to_move());
if ((t1_att & ksq) && (between_bb(t1, ksq) & f2))
return true;
return false;