// Static evaluation. Returns score
score_t eval(position_t *p, bool verbose, full_board_t* board) {
// seed rand_r with a value of 1, as per
// http://linux.die.net/man/3/rand_r
static __thread unsigned int seed = 1;
// verbose = true: print out components of score
ev_score_t score[2] = { 0, 0 };
// int corner[2][2] = { {INF, INF}, {INF, INF} };
ev_score_t bonus;
color_t c = WHITE;
while (true) {
for (pnum_t pnum = 0; pnum <= board->pawn_count[c]; pnum++) {
square_t sq = board->pieces[c][pnum];
rnk_t r = rnk_of(sq);
fil_t f = fil_of(sq);
piece_t x = board->board[sq];
switch (ptype_of(x)) {
case EMPTY:
tbassert(false, "Jose says: no way!\n"); // No way, Jose!
case PAWN:
// PBETWEEN heuristic
bonus = pbetween(p, r, f, board);
score[c] += bonus;
// PCENTRAL heuristic
bonus = pcentral(r, f);
score[c] += bonus;
break;
case KING:
// KFACE heuristic
bonus = kface(p, r, f, board);
score[c] += bonus;
// KAGGRESSIVE heuristic
bonus = kaggressive(p, r, f, board);
score[c] += bonus;
break;
case INVALID:
tbassert(false, "Jose says: no way!\n"); // No way, Jose!
default:
tbassert(false, "Jose says: no way!\n"); // No way, Jose!
}
}
if (c == BLACK)
break;
c = BLACK;
}
score[WHITE] += board->pawn_count[WHITE] * PAWN_EV_VALUE;
score[BLACK] += board->pawn_count[BLACK] * PAWN_EV_VALUE;
square_t white_laser_list[MAX_NUM_PIECES];
square_t black_laser_list[MAX_NUM_PIECES];
int whitePathCount = get_laser_path_list(p, white_laser_list, WHITE, board);
int blackPathCount = get_laser_path_list(p, black_laser_list, BLACK, board);
ev_score_t w_hattackable = HATTACK * h_squares_attackable(p, WHITE, white_laser_list, whitePathCount, board);
score[WHITE] += w_hattackable;
ev_score_t b_hattackable = HATTACK * h_squares_attackable(p, BLACK, black_laser_list, blackPathCount, board);
score[BLACK] += b_hattackable;
int w_mobility_list = MOBILITY * mobility_list(p, WHITE, black_laser_list, blackPathCount, board);
score[WHITE] += w_mobility_list;
int b_mobility_list = MOBILITY * mobility_list(p, BLACK, white_laser_list, whitePathCount, board);
score[BLACK] += b_mobility_list;
// PAWNPIN Heuristic --- is a pawn immobilized by the enemy laser.
int w_pawnpin = PAWNPIN * pawnpin(p, WHITE, black_laser_list, blackPathCount, board); //use other color's laser map
score[WHITE] += w_pawnpin;
int b_pawnpin = PAWNPIN * pawnpin(p, BLACK, white_laser_list, whitePathCount, board); //use other color's laser map
score[BLACK] += b_pawnpin;
// score from WHITE point of view
ev_score_t tot = score[WHITE] - score[BLACK];
if (RANDOMIZE) {
ev_score_t z = rand_r(&seed) % (RANDOMIZE*2+1);
tot = tot + z - RANDOMIZE;
}
if (color_to_move_of(p) == BLACK) {
tot = -tot;
}
return tot / EV_SCORE_RATIO;
}
// Static evaluation. Returns score
score_t eval(position_t *p, bool verbose) {
// seed rand_r with a value of 1, as per
// http://linux.die.net/man/3/rand_r
static __thread unsigned int seed = 1;
// verbose = true: print out components of score
ev_score_t score[2] = { 0, 0 };
// int corner[2][2] = { {INF, INF}, {INF, INF} };
ev_score_t bonus;
//char buf[MAX_CHARS_IN_MOVE];
color_t c;
for (fil_t f = 0; f < BOARD_WIDTH; f++) {
for (rnk_t r = 0; r < BOARD_WIDTH; r++) {
square_t sq = square_of(f, r);
piece_t x = p->board[sq];
//if (verbose) {
// square_to_str(sq, buf, MAX_CHARS_IN_MOVE);
//}
switch (ptype_of(x)) {
case EMPTY:
break;
case PAWN:
c = color_of(x);
// MATERIAL heuristic: Bonus for each Pawn
bonus = PAWN_EV_VALUE;
// if (verbose) {
// printf("MATERIAL bonus %d for %s Pawn on %s\n", bonus, color_to_str(c), buf);
// }
score[c] += bonus;
// PBETWEEN heuristic
bonus = pbetween(p, f, r);
// if (verbose) {
// printf("PBETWEEN bonus %d for %s Pawn on %s\n", bonus, color_to_str(c), buf);
// }
score[c] += bonus;
// PCENTRAL heuristic
bonus = pcentral(f, r);
// if (verbose) {
// printf("PCENTRAL bonus %d for %s Pawn on %s\n", bonus, color_to_str(c), buf);
// }
score[c] += bonus;
break;
case KING:
c = color_of(x);
// KFACE heuristic
bonus = kface(p, f, r);
// if (verbose) {
// printf("KFACE bonus %d for %s King on %s\n", bonus,
// color_to_str(c), buf);
// }
score[c] += bonus;
// KAGGRESSIVE heuristic
color_t othercolor = opp_color(c);
square_t otherking = p->kloc[othercolor];
fil_t otherf = fil_of(otherking);
rnk_t otherr = rnk_of(otherking);
bonus = kaggressive(f, r, otherf, otherr);
assert(bonus == kaggressive_old(p, f, r));
// if (verbose) {
// printf("KAGGRESSIVE bonus %d for %s King on %s\n", bonus, color_to_str(c), buf);
// }
score[c] += bonus;
break;
case INVALID:
break;
default:
tbassert(false, "Jose says: no way!\n"); // No way, Jose!
}
laser_map_black[sq] = 0;
laser_map_white[sq] = 0;
}
}
int black_pawns_unpinned = mark_laser_path(p, laser_map_white, WHITE, 1); // 1 = path of laser with no moves
ev_score_t w_hattackable = HATTACK * (int) h_attackable;
score[WHITE] += w_hattackable;
// if (verbose) {
// printf("HATTACK bonus %d for White\n", w_hattackable);
// }
// PAWNPIN Heuristic --- is a pawn immobilized by the enemy laser.
int b_pawnpin = PAWNPIN * black_pawns_unpinned;
score[BLACK] += b_pawnpin;
int b_mobility = MOBILITY * mobility(p, BLACK);
score[BLACK] += b_mobility;
// if (verbose) {
// printf("MOBILITY bonus %d for Black\n", b_mobility);
// }
int white_pawns_unpinned = mark_laser_path(p, laser_map_black, BLACK, 1); // 1 = path of laser with no moves
ev_score_t b_hattackable = HATTACK * (int) h_attackable;
score[BLACK] += b_hattackable;
// if (verbose) {
// printf("HATTACK bonus %d for Black\n", b_hattackable);
// }
int w_mobility = MOBILITY * mobility(p, WHITE);
score[WHITE] += w_mobility;
// if (verbose) {
// printf("MOBILITY bonus %d for White\n", w_mobility);
// }
int w_pawnpin = PAWNPIN * white_pawns_unpinned;
score[WHITE] += w_pawnpin;
// score from WHITE point of view
ev_score_t tot = score[WHITE] - score[BLACK];
if (RANDOMIZE) {
ev_score_t z = rand_r(&seed) % (RANDOMIZE*2+1);
tot = tot + z - RANDOMIZE;
}
if (color_to_move_of(p) == BLACK) {
tot = -tot;
}
return tot / EV_SCORE_RATIO;
}