static bool kbpk_draw (int wp, int wb, int bk) {
ASSERT(SQUARE_IS_OK(wp));
ASSERT(SQUARE_IS_OK(wb));
ASSERT(SQUARE_IS_OK(bk));
if (SQUARE_FILE(wp) == FileA
&& DISTANCE(bk,A8) <= 1
&& SQUARE_COLOUR(wb) != SQUARE_COLOUR(A8)) {
return true;
}
return false;
}
bool move_is_pseudo( int move, board_t *board )
{
int me, opp;
int from, to;
int piece, capture;
ASSERT(move_is_ok(move));
ASSERT(board != NULL);
// init
me = board->turn;
opp = COLOUR_OPP(board->turn);
// from
from = MOVE_FROM(move);
ASSERT(SQUARE_IS_OK(from));
piece = board->square[from];
if(INDEX_TO_COLOUR(piece) != me)
return false;
// to
to = MOVE_TO(move);
ASSERT(SQUARE_IS_OK(to));
capture = board->square[to];
if( INDEX_TO_COLOUR(capture) == me )
return false;
// move
switch(INDEX_TO_PIECE(piece))
{
case RedKing:
if(KING_IN_CITY(to) && KLegalDt[to - from + 256]) return true;
if(EQUAL_FILE(from, to) && INDEX_TO_PIECE(capture) == BlackKing)
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(FileCapMin[row][board->file[col]] + col == to) return true;
}
return false;
case BlackKing:
if(KING_IN_CITY(to) && KLegalDt[to - from + 256]) return true;
if(EQUAL_FILE(from, to) && INDEX_TO_PIECE(capture) ==RedKing)
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(FileCapMax[row][board->file[col]] + col == to) return true;
}
return false;
case RedAdvisor:
case BlackAdvisor:
if(ADVISOR_IN_CITY(to) && ALegalDt[to - from + 256]) return true;
return false;
case RedBishop:
case BlackBishop:
if(BISHOP_IN_CITY(to) &&
BLegalDt[to - from + 256] &&
board->square[(to + from) >> 1] == PieceNone)//
return true;
return false;
case RedKnight:
case BlackKnight:
if(NLegalDt[to - from + 256] && board->square[from + NLegalDt[to - from + 256]] == PieceNone)//
return true;
return false;
case RedRook:
case BlackRook:
if(capture)
{
if(EQUAL_FILE(from, to))
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(FileCapMax[row][board->file[col]] + col == to || FileCapMin[row][board->file[col]] + col == to)
return true;
}
else if(EQUAL_RANK(from, to))
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(RankCapMax[col][board->rank[row]] + (row << 4) == to ||
RankCapMin[col][board->rank[row]] + (row << 4) == to)
return true;
}
}
else
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
int to_row = SQUARE_RANK(to) - 3;
int to_col = SQUARE_FILE(to) - 3;
int rowbit = board->rank[row];
int colbit = board->file[col];
if(EQUAL_FILE(from, to))
{
//if(FileNonCapMin[row][board->file[col]] + col <= to && to <= FileNonCapMax[row][board->file[col]] + col)
if(PinNb[row][to_row][colbit] == 0)
return true;
}
else if(EQUAL_RANK(from, to))
{
//if(RankNonCapMin[col][board->rank[row]] + (row << 4) <= to && to <= RankNonCapMax[col][board->rank[row]] + (row << 4))
if(PinNb[col][to_col][rowbit] == 0)
return true;
}
}
return false;
case RedCannon:
case BlackCannon:
if(capture)
{
if(EQUAL_RANK(from, to))
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(CannonRankCapMax[col][board->rank[row]] + (row << 4) == to ||
CannonRankCapMin[col][board->rank[row]] + (row << 4) == to)
return true;
}
else if(EQUAL_FILE(from, to))
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
if(CannonFileCapMax[row][board->file[col]] + col == to ||
CannonFileCapMin[row][board->file[col]] + col == to)
return true;
}
}
else
{
int row=SQUARE_RANK(from) - 3;
int col=SQUARE_FILE(from) - 3;
int to_row = SQUARE_RANK(to) - 3;
int to_col = SQUARE_FILE(to) - 3;
int rowbit = board->rank[row];
int colbit = board->file[col];
if(EQUAL_RANK(from, to))
{
//if(RankNonCapMin[col][board->rank[row]] + (row << 4) <= to && to <= RankNonCapMax[col][board->rank[row]] + (row << 4))
if(PinNb[col][to_col][rowbit] == 0)
return true;
}
else if(EQUAL_FILE(from, to))
{
//if(FileNonCapMin[row][board->file[col]] + col <= to&& to <= FileNonCapMax[row][board->file[col]] + col)
if(PinNb[row][to_row][colbit] == 0)
return true;
}
}
return false;
case BlackPawn:
if((from + 16) == to) return true;
if(SQUARE_COLOUR(from) == Red)
{
if((from - 1) == to || (from + 1) == to)
return true;
}
return false;
case RedPawn:
if((from - 16) == to) return true;
if(SQUARE_COLOUR(from) == Black)
{
if((from - 1) == to || (from + 1) == to)
return true;
}
default:
return false;
}
return false;
}
bool recog_draw(const board_t * board, int ThreadId) {
material_info_t mat_info[1];
ASSERT(board!=NULL);
// material
if (board->piece_nb > 4) return false;
material_get_info(mat_info,board,ThreadId);
if ((mat_info->flags & DrawNodeFlag) == 0) return false;
// recognisers
if (false) {
} else if (mat_info->recog == MAT_KK) {
// KK
return true;
} else if (mat_info->recog == MAT_KBK) {
// KBK (white)
return true;
} else if (mat_info->recog == MAT_KKB) {
// KBK (black)
return true;
} else if (mat_info->recog == MAT_KNK) {
// KNK (white)
return true;
} else if (mat_info->recog == MAT_KKN) {
// KNK (black)
return true;
} else if (mat_info->recog == MAT_KPK) {
// KPK (white)
int me, opp;
int wp, wk, bk;
me = White;
opp = COLOUR_OPP(me);
wp = board->pawn[me][0];
wk = KING_POS(board,me);
bk = KING_POS(board,opp);
if (SQUARE_FILE(wp) >= FileE) {
wp = SQUARE_FILE_MIRROR(wp);
wk = SQUARE_FILE_MIRROR(wk);
bk = SQUARE_FILE_MIRROR(bk);
}
if (kpk_draw(wp,wk,bk,board->turn)) {
return true;
}
} else if (mat_info->recog == MAT_KKP) {
// KPK (black)
int me, opp;
int wp, wk, bk;
me = Black;
opp = COLOUR_OPP(me);
wp = SQUARE_RANK_MIRROR(board->pawn[me][0]);
wk = SQUARE_RANK_MIRROR(KING_POS(board,me));
bk = SQUARE_RANK_MIRROR(KING_POS(board,opp));
if (SQUARE_FILE(wp) >= FileE) {
wp = SQUARE_FILE_MIRROR(wp);
wk = SQUARE_FILE_MIRROR(wk);
bk = SQUARE_FILE_MIRROR(bk);
}
if (kpk_draw(wp,wk,bk,COLOUR_OPP(board->turn))) {
return true;
}
} else if (mat_info->recog == MAT_KBKB) {
// KBKB
int wb, bb;
wb = board->piece[White][1];
bb = board->piece[Black][1];
if (SQUARE_COLOUR(wb) == SQUARE_COLOUR(bb)) { // bishops on same colour
return true;
}
} else if (mat_info->recog == MAT_KBPK) {
// KBPK (white)
int me, opp;
int wp, wb, bk;
me = White;
opp = COLOUR_OPP(me);
wp = board->pawn[me][0];
wb = board->piece[me][1];
bk = KING_POS(board,opp);
if (SQUARE_FILE(wp) >= FileE) {
wp = SQUARE_FILE_MIRROR(wp);
wb = SQUARE_FILE_MIRROR(wb);
bk = SQUARE_FILE_MIRROR(bk);
}
if (kbpk_draw(wp,wb,bk)) return true;
} else if (mat_info->recog == MAT_KKBP) {
// KBPK (black)
int me, opp;
int wp, wb, bk;
me = Black;
opp = COLOUR_OPP(me);
wp = SQUARE_RANK_MIRROR(board->pawn[me][0]);
wb = SQUARE_RANK_MIRROR(board->piece[me][1]);
bk = SQUARE_RANK_MIRROR(KING_POS(board,opp));
if (SQUARE_FILE(wp) >= FileE) {
wp = SQUARE_FILE_MIRROR(wp);
wb = SQUARE_FILE_MIRROR(wb);
bk = SQUARE_FILE_MIRROR(bk);
}
if (kbpk_draw(wp,wb,bk)) return true;
} else {
ASSERT(false);
}
return false;
}
