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movegen.c
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movegen.c
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/*******************************************************************************
BUCEPHALUS Progressive Chess Analysis Tool
Copyright (C) 2016 Doug Hyatt
Code Author: Doug Hyatt
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*******************************************************************************/
#include <stdio.h>
#include <string.h>
#include "chess.h"
void GenerateMoves(Listnode *ml, Position *pos)
{
int i, j, x, y, direc, cancastle;
unsigned char side = pos->side, xside;
SQUARE board[12][12];
if(side == WHITE) {
xside = BLACK; direc = 1; }
else {
xside = WHITE; direc = -1; }
ClearMoves(ml);
for(i = 0; i < MAXLEGAL; i++) {
ml->moves[i].oldep = pos->epstatus;
ml->moves[i].oldcastle = pos->castle; }
memcpy(&(board[0][0]), &(pos->board[0][0]), sizeof(SQUARE) * 144);
for(i = 2; i < 10; i++) {
for(j = 2; j < 10; j++) {
if(board[i][j] != 0 && (board[i][j] & side)) {
if(board[i][j] & KNIGHT) {
x = -1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
if((board[i][j] & BISHOP) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j-x] != OFFBOARD) && (!(board[i-x][j-x] & side)); x++)
if(board[i-x][j-x] & xside) {
AddMove(ml, i, j, i-x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j-x, NORMAL);
for(x = 1; (board[i-x][j+x] != OFFBOARD) && (!(board[i-x][j+x] & side)); x++)
if(board[i-x][j+x] & xside) {
AddMove(ml, i, j, i-x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j+x, NORMAL);
for(x = 1; (board[i+x][j-x] != OFFBOARD) && (!(board[i+x][j-x] & side)); x++)
if(board[i+x][j-x] & xside) {
AddMove(ml, i, j, i+x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j-x, NORMAL);
for(x = 1; (board[i+x][j+x] != OFFBOARD) && (!(board[i+x][j+x] & side)); x++)
if(board[i+x][j+x] & xside) {
AddMove(ml, i, j, i+x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j+x, NORMAL);
}
if((board[i][j] & ROOK) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j] != OFFBOARD) && (!(board[i-x][j] & side)); x++)
if(board[i-x][j] & xside) {
AddMove(ml, i, j, i-x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j, NORMAL);
for(x = 1; (board[i+x][j] != OFFBOARD) && (!(board[i+x][j] & side)); x++)
if(board[i+x][j] & xside) {
AddMove(ml, i, j, i+x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j, NORMAL);
for(x = 1; (board[i][j-x] != OFFBOARD) && (!(board[i][j-x] & side)); x++)
if(board[i][j-x] & xside) {
AddMove(ml, i, j, i, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j-x, NORMAL);
for(x = 1; (board[i][j+x] != OFFBOARD) && (!(board[i][j+x] & side)); x++)
if(board[i][j+x] & xside) {
AddMove(ml, i, j, i, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j+x, NORMAL);
}
if(board[i][j] & KING) {
for(x = -1; x <= 1; x++)
for(y = -1; y <= 1; y++) {
if(x == 0 && y == 0) continue;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
}
if(board[i][j] & PAWN) {
if(board[i][j+direc] == 0) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i, j+direc, PROMOTE);
else AddMove(ml, i, j, i, j+direc, NORMAL);
}
if((direc == -1 && j == 8) || (direc == 1 && j == 3))
if(board[i][j+direc+direc] == 0 && board[i][j+direc] == 0)
AddMove(ml, i, j, i, j+direc+direc, TWOMOVE);
if((board[i-1][j+direc] != OFFBOARD) && (board[i-1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i-1, j+direc, PROMCAP);
else AddMove(ml, i, j, i-1, j+direc, CAPTURE);
}
if((board[i+1][j+direc] != OFFBOARD) && (board[i+1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i+1, j+direc, PROMCAP);
else AddMove(ml, i, j, i+1, j+direc, CAPTURE);
}
/* there is at least one ep square */
if(pos->epstatus > 0 && direc == 1) {
if(j == 6 && IsEpSquare(i-1, 6, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 6 && IsEpSquare(i+1, 6, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
if(pos->epstatus > 0 && direc == -1) {
if(j == 5 && IsEpSquare(i-1, 5, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 5 && IsEpSquare(i+1, 5, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
}
}
}
}
if((pos->castle & WKC) && side == WHITE) {
cancastle = 1;
for(i = KFILE; i <= 8; i++)
if(Attacked(pos, i, 2, xside) == 1) cancastle = 0;
for(i = Minval(7, KFILE); i <= 8; i++)
if(i != KFILE && i != KRFILE && board[i][2] != 0) cancastle = 0;
if(cancastle == 1)
AddMove(ml, KFILE, 2, 8, 2, KSCASTLE); }
if((pos->castle & BKC) && side == BLACK) {
cancastle = 1;
for(i = KFILE; i <= 8; i++)
if(Attacked(pos, i, 9, xside) == 1) cancastle = 0;
for(i = Minval(7, KFILE); i <= 8; i++)
if(i != KFILE && i != KRFILE && board[i][9] != 0) cancastle = 0;
if(cancastle == 1)
AddMove(ml, KFILE, 9, 8, 9, KSCASTLE); }
if((pos->castle & WQC) && side == WHITE) {
cancastle = 1;
for(i = Minval(4, KFILE); i <= Maxval(4, KFILE); i++)
if(Attacked(pos, i, 2, xside) == 1) cancastle = 0;
for(i = Minval(QRFILE + 1, 4); i <= Maxval(5, KFILE); i++)
if(i != KFILE && i != QRFILE && board[i][2] != 0) cancastle = 0;
if(cancastle == 1)
AddMove(ml, KFILE, 2, 4, 2, QSCASTLE); }
if((pos->castle & BQC) && side == BLACK) {
cancastle = 1;
for(i = Minval(4, KFILE); i <= Maxval(4, KFILE); i++)
if(Attacked(pos, i, 9, xside) == 1) cancastle = 0;
for(i = Minval(QRFILE + 1, 4); i <= Maxval(5, KFILE); i++)
if(i != KFILE && i != QRFILE && board[i][9] != 0) cancastle = 0;
if(cancastle == 1)
AddMove(ml, KFILE, 9, 4, 9, QSCASTLE); }
for(i = 0; ml->moves[i].mtype != EMPTY; i++) {
MakeMove(pos, &(ml->moves[i]));
if(IsCheck(pos, side) == 1) {
UnmakeMove(pos, &(ml->moves[i]));
ml->moves[i].mtype = EMPTY;
ml->num--; }
else UnmakeMove(pos, &(ml->moves[i]));
}
}
int Attacked(Position *pos, int x, int y, unsigned char side)
{
int i, j, direc;
SQUARE board[12][12];
memcpy(&(board[0][0]), &(pos->board[0][0]), sizeof(SQUARE) * 144);
if(side == WHITE) {
direc = 1; }
else {
direc = -1; }
/* check pawns first */
if((board[x-1][y-direc] != OFFBOARD) && (board[x-1][y-direc] & side) && (board[x-1][y-direc] & PAWN))
return 1;
if((board[x+1][y-direc] != OFFBOARD) && (board[x+1][y-direc] & side) && (board[x+1][y-direc] & PAWN))
return 1;
/* check knight squares */
if((board[x-1][y-2] != OFFBOARD) && (board[x-1][y-2] & side) && (board[x-1][y-2] & KNIGHT))
return 1;
if((board[x+1][y-2] != OFFBOARD) && (board[x+1][y-2] & side) && (board[x+1][y-2] & KNIGHT))
return 1;
if((board[x-1][y+2] != OFFBOARD) && (board[x-1][y+2] & side) && (board[x-1][y+2] & KNIGHT))
return 1;
if((board[x+1][y+2] != OFFBOARD) && (board[x+1][y+2] & side) && (board[x+1][y+2] & KNIGHT))
return 1;
if((board[x-2][y-1] != OFFBOARD) && (board[x-2][y-1] & side) && (board[x-2][y-1] & KNIGHT))
return 1;
if((board[x+2][y-1] != OFFBOARD) && (board[x+2][y-1] & side) && (board[x+2][y-1] & KNIGHT))
return 1;
if((board[x-2][y+1] != OFFBOARD) && (board[x-2][y+1] & side) && (board[x-2][y+1] & KNIGHT))
return 1;
if((board[x+2][y+1] != OFFBOARD) && (board[x+2][y+1] & side) && (board[x+2][y+1] & KNIGHT))
return 1;
/* check king squares */
for(i = -1; i <=1; i++)
for(j = -1; j <=1; j++) {
if(i == 0 && j == 0) continue;
if((board[x+i][y+j] != OFFBOARD) && (board[x+i][y+j] & side) && (board[x+i][y+j] & KING))
return 1;
}
/* check diagonals */
for(i = 1; board[x-i][y-i] == 0; i++);
if((board[x-i][y-i] != OFFBOARD) && (board[x-i][y-i] & side) && (board[x-i][y-i] & (QUEEN | BISHOP)))
return 1;
for(i = 1; board[x-i][y+i] == 0; i++);
if((board[x-i][y+i] != OFFBOARD) && (board[x-i][y+i] & side) && (board[x-i][y+i] & (QUEEN | BISHOP)))
return 1;
for(i = 1; board[x+i][y-i] == 0; i++);
if((board[x+i][y-i] != OFFBOARD) && (board[x+i][y-i] & side) && (board[x+i][y-i] & (QUEEN | BISHOP)))
return 1;
for(i = 1; board[x+i][y+i] == 0; i++);
if((board[x+i][y+i] != OFFBOARD) && (board[x+i][y+i] & side) && (board[x+i][y+i] & (QUEEN | BISHOP)))
return 1;
/* check ranks and files */
for(i = 1; board[x-i][y] == 0; i++);
if((board[x-i][y] != OFFBOARD) && (board[x-i][y] & side) && (board[x-i][y] & (QUEEN | ROOK)))
return 1;
for(i = 1; board[x+i][y] == 0; i++);
if((board[x+i][y] != OFFBOARD) && (board[x+i][y] & side) && (board[x+i][y] & (QUEEN | ROOK)))
return 1;
for(i = 1; board[x][y-i] == 0; i++);
if((board[x][y-i] != OFFBOARD) && (board[x][y-i] & side) && (board[x][y-i] & (QUEEN | ROOK)))
return 1;
for(i = 1; board[x][y+i] == 0; i++);
if((board[x][y+i] != OFFBOARD) && (board[x][y+i] & side) && (board[x][y+i] & (QUEEN | ROOK)))
return 1;
return 0;
}
int AnyLegalMoves(Position *pos) {
int i, j, x, y, direc;
unsigned char side = pos->side, xside;
SQUARE board[12][12];
Listnode l, *ml = &l;
ClearMoves(ml);
for(i = 0; i < MAXLEGAL; i++) {
ml->moves[i].oldep = pos->epstatus;
ml->moves[i].oldcastle = pos->castle; }
if(side == WHITE) {
xside = BLACK; direc = 1; }
else {
xside = WHITE; direc = -1; }
memcpy(&(board[0][0]), &(pos->board[0][0]), sizeof(SQUARE) * 144);
for(i = 2; i < 10; i++)
for(j = 2; j < 10; j++) {
if(board[i][j] != 0 && (board[i][j] & side)) {
if(board[i][j] & KNIGHT) {
x = -1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
if((board[i][j] & BISHOP) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j-x] != OFFBOARD) && (!(board[i-x][j-x] & side)); x++)
if(board[i-x][j-x] & xside) {
AddMove(ml, i, j, i-x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j-x, NORMAL);
for(x = 1; (board[i-x][j+x] != OFFBOARD) && (!(board[i-x][j+x] & side)); x++)
if(board[i-x][j+x] & xside) {
AddMove(ml, i, j, i-x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j+x, NORMAL);
for(x = 1; (board[i+x][j-x] != OFFBOARD) && (!(board[i+x][j-x] & side)); x++)
if(board[i+x][j-x] & xside) {
AddMove(ml, i, j, i+x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j-x, NORMAL);
for(x = 1; (board[i+x][j+x] != OFFBOARD) && (!(board[i+x][j+x] & side)); x++)
if(board[i+x][j+x] & xside) {
AddMove(ml, i, j, i+x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j+x, NORMAL);
}
if((board[i][j] & ROOK) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j] != OFFBOARD) && (!(board[i-x][j] & side)); x++)
if(board[i-x][j] & xside) {
AddMove(ml, i, j, i-x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j, NORMAL);
for(x = 1; (board[i+x][j] != OFFBOARD) && (!(board[i+x][j] & side)); x++)
if(board[i+x][j] & xside) {
AddMove(ml, i, j, i+x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j, NORMAL);
for(x = 1; (board[i][j-x] != OFFBOARD) && (!(board[i][j-x] & side)); x++)
if(board[i][j-x] & xside) {
AddMove(ml, i, j, i, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j-x, NORMAL);
for(x = 1; (board[i][j+x] != OFFBOARD) && (!(board[i][j+x] & side)); x++)
if(board[i][j+x] & xside) {
AddMove(ml, i, j, i, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j+x, NORMAL);
}
if(board[i][j] & KING) {
for(x = -1; x <= 1; x++)
for(y = -1; y <= 1; y++) {
if(x == 0 && y == 0) continue;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
}
if(board[i][j] & PAWN) {
if(board[i][j+direc] == 0) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i, j+direc, PROMOTE);
else AddMove(ml, i, j, i, j+direc, NORMAL);
}
if((direc == -1 && j == 8) || (direc == 1 && j == 3))
if(board[i][j+direc+direc] == 0 && board[i][j+direc] == 0)
AddMove(ml, i, j, i, j+direc+direc, TWOMOVE);
if((board[i-1][j+direc] != OFFBOARD) && (board[i-1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i-1, j+direc, PROMCAP);
else AddMove(ml, i, j, i-1, j+direc, CAPTURE);
}
if((board[i+1][j+direc] != OFFBOARD) && (board[i+1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i+1, j+direc, PROMCAP);
else AddMove(ml, i, j, i+1, j+direc, CAPTURE);
}
if(pos->epstatus > 0 && direc == 1) /* there is at least one ep square */ {
if(j == 6 && IsEpSquare(i-1, 6, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 6 && IsEpSquare(i+1, 6, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
if(pos->epstatus > 0 && direc == -1) {
if(j == 5 && IsEpSquare(i-1, 5, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 5 && IsEpSquare(i+1, 5, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
}
for(x = 0; ml->moves[x].mtype != EMPTY; x++) {
MakeMove(pos, &(ml->moves[x]));
if(IsCheck(pos, side) == 1) {
UnmakeMove(pos, &(ml->moves[x]));
ml->moves[x].mtype = EMPTY;
ml->num--; }
else UnmakeMove(pos, &(ml->moves[x]));
}
if(ml->num > 0) { return 1; }
}
}
return 0;
}
void GenerateLegalandIllegal(Listnode *ml, Position *pos)
{
int i, j, x, y, direc;
unsigned char side = pos->side, xside;
SQUARE board[12][12];
if(side == WHITE) {
xside = BLACK; direc = 1; }
else {
xside = WHITE; direc = -1; }
ClearMoves(ml);
for(i = 0; i < MAXLEGAL; i++) {
ml->moves[i].oldep = pos->epstatus;
ml->moves[i].oldcastle = pos->castle; }
memcpy(&(board[0][0]), &(pos->board[0][0]), sizeof(SQUARE) * 144);
for(i = 2; i < 10; i++)
for(j = 2; j < 10; j++) {
if(board[i][j] != 0 && (board[i][j] & side)) {
if(board[i][j] & KNIGHT) {
x = -1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = -2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 1; y = 2;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = -2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = -1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
x = 2; y = 1;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
if((board[i][j] & BISHOP) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j-x] != OFFBOARD) && (!(board[i-x][j-x] & side)); x++)
if(board[i-x][j-x] & xside) {
AddMove(ml, i, j, i-x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j-x, NORMAL);
for(x = 1; (board[i-x][j+x] != OFFBOARD) && (!(board[i-x][j+x] & side)); x++)
if(board[i-x][j+x] & xside) {
AddMove(ml, i, j, i-x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j+x, NORMAL);
for(x = 1; (board[i+x][j-x] != OFFBOARD) && (!(board[i+x][j-x] & side)); x++)
if(board[i+x][j-x] & xside) {
AddMove(ml, i, j, i+x, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j-x, NORMAL);
for(x = 1; (board[i+x][j+x] != OFFBOARD) && (!(board[i+x][j+x] & side)); x++)
if(board[i+x][j+x] & xside) {
AddMove(ml, i, j, i+x, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j+x, NORMAL);
}
if((board[i][j] & ROOK) || (board[i][j] & QUEEN)) {
for(x = 1; (board[i-x][j] != OFFBOARD) && (!(board[i-x][j] & side)); x++)
if(board[i-x][j] & xside) {
AddMove(ml, i, j, i-x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i-x, j, NORMAL);
for(x = 1; (board[i+x][j] != OFFBOARD) && (!(board[i+x][j] & side)); x++)
if(board[i+x][j] & xside) {
AddMove(ml, i, j, i+x, j, CAPTURE);
break; }
else AddMove(ml, i, j, i+x, j, NORMAL);
for(x = 1; (board[i][j-x] != OFFBOARD) && (!(board[i][j-x] & side)); x++)
if(board[i][j-x] & xside) {
AddMove(ml, i, j, i, j-x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j-x, NORMAL);
for(x = 1; (board[i][j+x] != OFFBOARD) && (!(board[i][j+x] & side)); x++)
if(board[i][j+x] & xside) {
AddMove(ml, i, j, i, j+x, CAPTURE);
break; }
else AddMove(ml, i, j, i, j+x, NORMAL);
}
if(board[i][j] & KING) {
for(x = -1; x <= 1; x++) {
for(y = -1; y <= 1; y++) {
if(x == 0 && y == 0) continue;
if((board[i+x][j+y] != OFFBOARD) && (!(board[i+x][j+y] & side))) {
if(board[i+x][j+y] & xside) AddMove(ml, i, j, i+x, j+y, CAPTURE);
else AddMove(ml, i, j, i+x, j+y, NORMAL);
}
}
}
}
if(board[i][j] & PAWN) {
if(board[i][j+direc] == 0) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i, j+direc, PROMOTE);
else AddMove(ml, i, j, i, j+direc, NORMAL);
}
if((direc == -1 && j == 8) || (direc == 1 && j == 3))
if(board[i][j+direc+direc] == 0 && board[i][j+direc] == 0)
AddMove(ml, i, j, i, j+direc+direc, TWOMOVE);
if((board[i-1][j+direc] != OFFBOARD) && (board[i-1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i-1, j+direc, PROMCAP);
else AddMove(ml, i, j, i-1, j+direc, CAPTURE);
}
if((board[i+1][j+direc] != OFFBOARD) && (board[i+1][j+direc] & xside)) {
if((direc == -1 && j == 3) || (direc == 1 && j == 8))
AddMove(ml, i, j, i+1, j+direc, PROMCAP);
else AddMove(ml, i, j, i+1, j+direc, CAPTURE);
}
if(pos->epstatus > 0 && direc == 1) /* there is at least one ep square */ {
if(j == 6 && IsEpSquare(i-1, 6, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 6 && IsEpSquare(i+1, 6, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
if(pos->epstatus > 0 && direc == -1) {
if(j == 5 && IsEpSquare(i-1, 5, pos->epstatus) == 1 && board[i-1][j+direc] == 0)
AddMove(ml, i, j, i-1, j+direc, ENPASSANT);
if(j == 5 && IsEpSquare(i+1, 5, pos->epstatus) == 1 && board[i+1][j+direc] == 0)
AddMove(ml, i, j, i+1, j+direc, ENPASSANT);
}
}
}
}
}