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direct.c
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/*
* direct.c
* (c) 2017, Brian Stephenson
* brian@bstephen.me.uk
*
* A program to test orthodox chess problems of the types:
*
* directmates
* selfmates
* relfexmates
* helpmates
*
* Input is taken from the program options and output is xml on stdout.
*
* This is the module for solving directmates.
*/
#include "sengine.h"
extern unsigned int opt_moves;
extern bool opt_set;
extern bool opt_tries;
extern bool opt_actual;
extern unsigned int opt_sols;
extern bool opt_trivialtries;
extern enum SOUNDNESS sound;
extern enum THREATS opt_threats;
extern enum AIM opt_aim;
extern unsigned int opt_refuts;
extern bool opt_shortvars;
extern bool opt_fleck;
#ifdef MOVESTAT
static char toPiece(enum PIECE);
char* toSquare(int);
#endif
static void sortStrongBlackMoves(BOARDLIST*);
static void sortWhiteMoves(BOARDLIST*);
static BOARDLIST* norm_final_move(BOARD*, int);
static BOARDLIST* gloss_final_move(BOARD*, int);
static BOARDLIST* gloss_first_move(BOARD*, int);
static BOARDLIST* gloss_blackMidMove(BOARD*, int, int);
static BOARDLIST* gloss_blackMove(BOARD*, int);
static BOARDLIST* norm_first_move(BOARD*);
static BOARDLIST* gloss_whiteMidMove(BOARD*, int, int);
static void calculateThreats(BOARDLIST*);
static void sortTriesKeys(DIR_SOL*);
static void deTrivialise(BOARDLIST*);
static BOARDLIST* calculateSetPlay(BOARD*);
static void calculateSetThreats(BOARDLIST*);
static BOARDLIST* norm_whiteMidMove(BOARD*, int);
static BOARDLIST* blackMove(BOARD*);
static BOARDLIST* norm_blackMidMove(BOARD*, int);
static void walkWBoardList(BOARDLIST*);
static bool isFlight(BOARD*);
static bool isCheck(BOARD*);
static bool isGiver(BOARD*);
static bool isCapture(BOARD*);
static bool isKiller(BOARD*);
static bool isProm(BOARD*);
static int blackMoveCompare(void*, void*);
static int whiteMoveCompare(void*, void*);
static enum STATUS state;
static unsigned int hash_added = 0;
static unsigned int hash_hit_null = 0;
static unsigned int hash_hit_list = 0;
static HASHVALUE* transtable = NULL;
static KILLERHASHVALUE* killers = NULL;
#ifdef MOVESTAT
static char toPiece(enum PIECE inpc)
{
char tr[] = "XPSBRQK";
return tr[inpc];
}
#endif
static int whiteMoveCompare(void* a, void* b)
{
BOARD* aa = (BOARD*) a;
BOARD* bb = (BOARD*) b;
int ia;
int ib;
if (isCheck(aa) == true) {
ia = 1;
} else if (isCapture(aa) == true) {
ia = 2;
} else if (isProm(aa) == true) {
ia = 3;
} else {
ia = 4;
}
if (isCheck(bb) == true) {
ib = 1;
} else if (isCapture(bb) == true) {
ib = 2;
} else if (isProm(bb) == true) {
ib = 3;
} else {
ib = 4;
}
if (ia == ib) {
return 0;
} else {
return (ia < ib) ? -1 : 1;
}
}
static int blackMoveCompare(void* a, void* b)
{
BOARD* aa = (BOARD*) a;
BOARD* bb = (BOARD*) b;
int ia;
int ib;
if (isCheck(aa) == true) {
ia = 1;
} else if (isGiver(aa) == true) {
ia = 2;
} else if (isFlight(aa) == true) {
ia = 3;
} else if (isKiller(aa) == true) {
ia = 4;
} else if (isCapture(aa) == true) {
ia = 5;
} else if (isProm(aa) == true) {
ia = 6;
} else {
ia = 7;
}
if (isCheck(bb) == true) {
ib = 1;
} else if (isGiver(bb) == true) {
ib = 2;
} else if (isFlight(bb) == true) {
ib = 3;
} else if (isKiller(bb) == true) {
ib = 4;
} else if (isCapture(bb) == true) {
ib = 5;
} else if (isProm(bb) == true) {
ib = 6;
} else {
ib = 7;
}
if (ia == ib) {
return 0;
} else {
return (ia < ib) ? -1 : 1;
}
}
static void sortStrongBlackMoves(BOARDLIST* ibl)
{
LL_SORT(ibl->vektor, blackMoveCompare);
return;
}
static void sortWhiteMoves(BOARDLIST* ibl)
{
LL_SORT(ibl->vektor, whiteMoveCompare);
return;
}
static bool isKiller(BOARD* bd)
{
return bd->killer;
}
static bool isFlight(BOARD* bd)
{
return (bd->mover == KING) ? true : false;
}
static bool isCheck(BOARD* bd)
{
return bd->check;
}
static bool isGiver(BOARD* bd)
{
return (bd->flights > 0) ? true : false;
}
static bool isCapture(BOARD* bd)
{
return bd->captured;
}
static bool isProm(BOARD* bd)
{
return (bd->promotion == NOPIECE) ? false : true;
}
BOARDLIST* generateRefutations(BOARD*, int);
void qualifyMove(BOARDLIST*, BOARD*);
void solve_direct(DIR_SOL* dsol, BOARD* startpos)
{
bool shortsol = false;
unsigned int m;
sound = UNSET;
if ((opt_actual == true) && (opt_moves == 1)) {
int ct;
BOARD* bd;
dsol->keys = norm_final_move(startpos, 1);
LL_COUNT(dsol->keys->vektor, bd, ct);
if (ct == 0) {
sound = NO_SOLUTION;
} else if (ct < (int) opt_sols) {
sound = MISSING_SOLUTION;
} else if (ct == (int) opt_sols) {
sound = SOUND;
} else {
sound = COOKED;
}
} else if ((opt_actual == true) || (opt_tries == true)) {
for (m = 1; m < opt_moves; m++) {
int ct;
BOARD* b;
BOARDLIST* ml;
#ifdef MOVESTAT
(void) fprintf(stderr, "Gloss %d\n", m);
(void) fflush(stderr);
#endif
if (m == 1) {
ml = gloss_final_move(startpos, 1);
} else {
ml = gloss_first_move(startpos, m);
}
LL_COUNT(ml->vektor, b, ct);
if (ct > 0) {
shortsol = true;
dsol->keys = ml;
sound = SHORT_SOLUTION;
break;
} else {
freeBoardlist(ml);
}
}
if (shortsol == false) {
int ct;
BOARD* b;
state = TRIESKEYS;
dsol->trieskeys = norm_first_move(startpos);
if (opt_threats != NONE) {
#ifdef MOVESTAT
(void) fputs("Threats\n", stderr);
(void) fflush(stderr);
#endif
state = THREATS;
calculateThreats(dsol->trieskeys);
}
sortTriesKeys(dsol);
//dsol->keys = dsol->trieskeys;
if ((opt_tries == true) && (opt_trivialtries == false)) {
deTrivialise(dsol->tries);
}
LL_COUNT(dsol->keys->vektor, b, ct);
if (ct == 0) {
sound = NO_SOLUTION;
} else if (ct < (int) opt_sols) {
sound = MISSING_SOLUTION;
} else if (ct == (int) opt_sols) {
sound = SOUND;
} else {
sound = COOKED;
}
}
}
if ((shortsol == false) && (opt_moves > 1) && (opt_set == true)
&& (startpos->check == false)) {
#ifdef MOVESTAT
(void) fputs("Set play\n", stderr);
(void) fflush(stderr);
#endif
state = SETPLAY;
dsol->set = calculateSetPlay(startpos);
if (opt_threats != NONE) {
state = THREATS;
calculateSetThreats(dsol->set);
}
}
if (opt_moves > 4) {
HASHVALUE* cu;
HASHVALUE* tmp;
HASH_ITER(hh, transtable, cu, tmp) {
HASH_DEL(transtable, cu);
free(cu);
}
}
{
KILLERHASHVALUE* cu;
KILLERHASHVALUE* tmp;
HASH_ITER(hh, killers, cu, tmp) {
HASH_DEL(killers, cu);
free(cu);
}
}
dsol->hash_added = hash_added;
dsol->hash_hit_null = hash_hit_null;
dsol->hash_hit_list = hash_hit_list;
return;
}
static BOARDLIST* gloss_blackMidMove(BOARD* inBrd, int move, int lastmove)
{
BOARDLIST* bml;
BOARDLIST* wml;
BOARD* b1;
BOARD* tmp;
BOARD* m;
bool finished = false;
unsigned char minStip = NOSTIP;
unsigned char maxStip = 0;
unsigned char mateIn;
unsigned int flights;
assert(inBrd != NULL);
bml = generateBlackBoardlist(inBrd, move, &flights);
if (inBrd->check != true) {
LL_FOREACH(bml->vektor, b1) {
int ct;
BOARDLIST* bbl = getBoardlist(BLACK, 2);
generateKingMoves(b1, BLACK, bbl);
LL_COUNT(bbl->vektor, tmp, ct);
if (ct > (int) flights) {
b1->flights = (unsigned char) ct;
}
freeBoardlist(bbl);
}
sortStrongBlackMoves(bml);
}
LL_FOREACH(bml->vektor, m) {
if ((move + 1) == lastmove) {
wml = gloss_final_move(m, lastmove);
mateIn = wml->stipIn;
} else {
wml = gloss_whiteMidMove(m, move + 1, lastmove);
mateIn = wml->stipIn;
}
if (mateIn == NOSTIP) {
finished = true;
freeBoardlist(wml);
break;
} else {
minStip = (mateIn < minStip) ? mateIn : minStip;
maxStip = (mateIn > maxStip) ? mateIn : maxStip;
m->nextply = wml;
qualifyMove(bml, m);
freePosition(m->pos);
m->pos = NULL;
}
}
if (finished == false) {
bml->minStip = minStip;
bml->maxStip = maxStip;
bml->stipIn = maxStip;
} else {
bml->minStip = NOSTIP;
bml->maxStip = NOSTIP;
bml->stipIn = NOSTIP;
}
return bml;
}
static BOARDLIST* gloss_whiteMidMove(BOARD* inBrd, int move, int lastmove)
{
BOARDLIST* wml;
BOARDLIST* bml;
BOARD* tmp;
BOARD* tmp1;
BOARD* m;
bool bcheck;
bool shortStipAchieved = false;
bool stipAchieved = false;
unsigned char maxStip = 0;
unsigned char minStip = NOSTIP;
int ct;
assert(inBrd != NULL);
wml = generateWhiteBoardlist(inBrd, move);
{
if (opt_aim == MATE) {
LL_FOREACH_SAFE(wml->vektor, m, tmp) {
if (shortStipAchieved == true) {
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else {
if (m->check == true) {
bml = generateRefutations(m, move);
LL_COUNT(bml->vektor, tmp1, ct);
if (ct == 0) {
shortStipAchieved = true;
m->tag = '#';
freePosition(m->pos);
m->pos = NULL;
} else {
LL_DELETE(wml->vektor, m);
freeBoard(m);
}
freeBoardlist(bml);
} else {
LL_DELETE(wml->vektor, m);
freeBoard(m);
}
}
}
} else {
LL_FOREACH_SAFE(wml->vektor, m, tmp) {
if (shortStipAchieved == true) {
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else {
if (m->check == false) {
bml = generateRefutations(m, move);
LL_COUNT(bml->vektor, tmp1, ct);
if (ct == 0) {
shortStipAchieved = true;
m->tag = '=';
freePosition(m->pos);
m->pos = NULL;
} else {
LL_DELETE(wml->vektor, m);
freeBoard(m);
}
freeBoardlist(bml);
} else {
LL_DELETE(wml->vektor, m);
freeBoard(m);
}
}
}
}
if (shortStipAchieved == true) {
wml->minStip = (unsigned char) move;
wml->maxStip = maxStip;
wml->stipIn = (unsigned char) move;
BOARDLIST* uml = generateWhiteBoardlist(inBrd, move);
BOARD* b;
LL_FOREACH(wml->vektor, b) {
qualifyMove(uml, b);
}
freeBoardlist(uml);
return wml;
}
}
freeBoardlist(wml);
wml = generateWhiteBoardlist(inBrd, move);
sortWhiteMoves(wml);
LL_FOREACH_SAFE(wml->vektor, m, tmp) {
if (stipAchieved == true) {
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else {
bcheck = m->check;
bml = gloss_blackMidMove(m, move, lastmove);
assert(bml != NULL);
LL_COUNT(bml->vektor, tmp1, ct);
if ((ct == 0) && (opt_aim == STALEMATE)
&& (bcheck == true)) {
freeBoardlist(bml);
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else if ((ct == 0) && (opt_aim == MATE)
&& (bcheck == false)) {
freeBoardlist(bml);
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else if (bml->stipIn == NOSTIP) {
freeBoardlist(bml);
LL_DELETE(wml->vektor, m);
freeBoard(m);
} else {
stipAchieved = true;
m->nextply = bml;
maxStip = (bml->stipIn > maxStip) ? bml->stipIn : maxStip;
minStip = (bml->stipIn < minStip) ? bml->stipIn : minStip;
}
}
}
if (stipAchieved == true) {
wml->minStip = minStip;
wml->maxStip = maxStip;
wml->stipIn = minStip;
BOARDLIST* uml = generateWhiteBoardlist(inBrd, move);
BOARD* b;
LL_FOREACH(wml->vektor, b) {
qualifyMove(uml, b);
}
freeBoardlist(uml);
} else {
wml->minStip = NOSTIP;
wml->maxStip = NOSTIP;
wml->stipIn = NOSTIP;
}
return wml;
}
static BOARDLIST* gloss_blackMove(BOARD* inBrd, int moves)
{
BOARDLIST* bml;
BOARDLIST* wml;
BOARD* tmp;
BOARD* b1;
BOARD* b;
unsigned char minStip = NOSTIP;
unsigned char maxStip = 0;
unsigned char mateIn;
bool stipAchieved = true;
unsigned int flights;
int ct;
assert(inBrd != NULL);
bml = generateBlackBoardlist(inBrd, 1, &flights);
if (inBrd->check != true) {
LL_FOREACH(bml->vektor, b1) {
BOARDLIST* bbl = getBoardlist(BLACK, 2);
generateKingMoves(b1, BLACK, bbl);
LL_COUNT(bbl->vektor, tmp, ct);
if (ct > (int) flights) {
b1->flights = (unsigned char) ct;
}
freeBoardlist(bbl);
}
sortStrongBlackMoves(bml);
}
LL_FOREACH(bml->vektor, b) {
if (moves == 2) {
wml = gloss_final_move(b, 2);
} else {
wml = gloss_whiteMidMove(b, 2, moves);
}
mateIn = wml->stipIn;
if (mateIn == NOSTIP) {
stipAchieved = false;
freeBoardlist(wml);
break;
} else {
minStip = (mateIn < minStip) ? mateIn : minStip;
maxStip = (mateIn > maxStip) ? mateIn : maxStip;
qualifyMove(bml, b);
b->nextply = wml;
freePosition(b->pos);
b->pos = NULL;
}
}
if (stipAchieved == true) {
bml->minStip = minStip;
bml->maxStip = maxStip;
bml->stipIn = maxStip;
} else {
bml->minStip = NOSTIP;
bml->maxStip = NOSTIP;
bml->stipIn = NOSTIP;
}
return bml;
}
static BOARDLIST* norm_blackMidMove(BOARD* inBrd, int move)
{
BOARDLIST* bml;
BOARDLIST* wml = NULL;
BOARD* m;
BOARD* b1;
BOARD* tmp;
unsigned char minStip = NOSTIP;
unsigned char maxStip = 0;
unsigned char mateIn;
bool refutationFound = false;
bool ishash = false;
unsigned int flights;
int ct;
HASHKEY kp;
assert(inBrd != NULL);
bml = generateBlackBoardlist(inBrd, move, &flights);
if (inBrd->check == false) {
LL_FOREACH(bml->vektor, b1) {
BOARDLIST* bbl = getBoardlist(BLACK, 2);
generateKingMoves(b1, BLACK, bbl);
LL_COUNT(bbl->vektor, tmp, ct);
if (ct > (int) flights) {
b1->flights = (unsigned char) ct;
}
freeBoardlist(bbl);
}
sortStrongBlackMoves(bml);
}
LL_FOREACH(bml->vektor, m) {
qualifyMove(bml, m);
if ((move + 1) == opt_moves) {
wml = norm_final_move(m, opt_moves);
mateIn = wml->stipIn;
} else {
if ((opt_moves > 4) && ((move == 2) || (move == 3))) {
HASHVALUE* ptr;
ishash = true;
getHashKey(m, &kp);
HASH_FIND(hh, transtable, &kp, MD5_LEN, ptr);
if (ptr != NULL) {
if (ptr->cont == NULL) {
refutationFound = true;
hash_hit_null++;
break;
} else {
hash_hit_list++;
ptr->cont->use_count++;
mateIn = ptr->cont->stipIn;
minStip = (mateIn < minStip) ? mateIn : minStip;
maxStip = (mateIn > maxStip) ? mateIn : maxStip;
m->nextply = ptr->cont;
continue;
}
} else {
wml = norm_whiteMidMove(m, move + 1);
mateIn = wml->stipIn;
}
} else {
wml = norm_whiteMidMove(m, move + 1);
mateIn = wml->stipIn;
}
}
if (mateIn == NOSTIP) {
refutationFound = true;
freeBoardlist(wml);
wml = NULL;
if (ishash == true) {
HASHVALUE* hv = getHashValue();
hv->cont = NULL;
(void) memcpy((void*) hv->hashkey, (void*) & (kp.hashkey),
MD5_LEN);
HASH_ADD(hh, transtable, hashkey, MD5_LEN, hv);
hash_added++;
}
break;
} else {
if (ishash == true) {
HASHVALUE* hv = getHashValue();
hv->cont = wml;
wml->use_count++;
(void) memcpy((void*) hv->hashkey, (void*) & (kp.hashkey),
MD5_LEN);
HASH_ADD(hh, transtable, hashkey, MD5_LEN, hv);
hash_added++;
}
minStip = (mateIn < minStip) ? mateIn : minStip;
maxStip = (mateIn > maxStip) ? mateIn : maxStip;
m->nextply = wml;
}
freePosition(m->pos);
m->pos = NULL;
}
if (refutationFound == false) {
bml->minStip = minStip;
bml->maxStip = maxStip;
bml->stipIn = maxStip;
LL_COUNT(bml->vektor, tmp, ct);
if ((state != SETPLAY) && (ct != 0)
&& (opt_shortvars == false) && (minStip != maxStip)) {
weedOutShortVars(bml, maxStip);
}
} else {
bml->minStip = NOSTIP;
bml->maxStip = NOSTIP;
bml->stipIn = NOSTIP;
}
return bml;
}
static BOARDLIST* blackMove(BOARD* inBrd)
{
BOARDLIST* bml;
BOARDLIST* wml;
BOARD* b;
BOARD* b1;
BOARD* tmp;
int ct;
unsigned int refuts = 0;
unsigned char minStip = NOSTIP;
unsigned char maxStip = 0;
unsigned char mateIn;
unsigned int flights;
unsigned int ks;
assert(inBrd != NULL);
bml = generateBlackBoardlist(inBrd, 1, &flights);
if (inBrd->check == false) {
LL_FOREACH(bml->vektor, b1) {
BOARDLIST* bbl = getBoardlist(BLACK, 2);
generateKingMoves(b1, BLACK, bbl);
LL_COUNT(bbl->vektor, tmp, ct);
if (ct > (int) flights) {
b1->flights = (unsigned char) ct;
}
freeBoardlist(bbl);
}
ks = HASH_COUNT(killers);
if (ks != 0) {
int rmax = 0;
KILLERKEY kmk;
KILLERHASHVALUE* cu;
KILLERHASHVALUE* tmp2;
BOARD* ab;
HASH_ITER(hh, killers, cu, tmp2) {
if (cu->count > rmax) {
rmax = cu->count;
kmk.kkey[0] = cu->kkey[0];
kmk.kkey[1] = cu->kkey[1];
kmk.kkey[2] = cu->kkey[2];
}
}
LL_FOREACH(bml->vektor, ab) {
KILLERKEY k;
getKillerHashKey(ab, &k);
if (memcmp((void*) &k, (void*) & (kmk.kkey[0]), 3) == 0) {
ab->killer = true;
}
}
}
sortStrongBlackMoves(bml);
}
LL_FOREACH(bml->vektor, b) {
#ifdef MOVESTAT
{
char* stf = toSquare(b->from);
char* stt = toSquare(b->to);
(void) fprintf(stderr,
" 1...%c%s-%s (added = %u, hit null = %u, hit_list = %u)\n",
toPiece(b->mover), stf, stt, hash_added,
hash_hit_null, hash_hit_list);
(void) fflush(stderr);
free(stf);
free(stt);
}
#endif
qualifyMove(bml, b);
if (opt_moves == 2) {
wml = norm_final_move(b, 2);
} else {
wml = norm_whiteMidMove(b, 2);
}
mateIn = wml->stipIn;
if (mateIn == NOSTIP) {
refuts++;
freeBoardlist(wml);
if ((b->mover != KING) && (b->check != true)
&& (b->flights == 0)
&& (b->captured == false)) {
KILLERKEY kk;
getKillerHashKey(b, &kk);
KILLERHASHVALUE* khv;
HASH_FIND(hh, killers, &kk, KILLERKEY_LEN, khv);
if (khv == NULL) {
khv = getKillerHashValue();
khv->kkey[0] = kk.kkey[0];
khv->kkey[1] = kk.kkey[1];
khv->kkey[2] = kk.kkey[2];
khv->count = 0;
HASH_ADD(hh, killers, kkey, KILLERKEY_LEN, khv);
} else {
khv->count++;
}
}
if (refuts > opt_refuts) {
break;
} else {
b->tag = '!';
}
} else {
minStip = (mateIn < minStip) ? mateIn : minStip;
maxStip = (mateIn > maxStip) ? mateIn : maxStip;
freePosition(b->pos);
b->pos = NULL;
b->nextply = wml;
}
}
if (refuts <= opt_refuts) {
bml->minStip = minStip;
bml->maxStip = maxStip;
bml->stipIn = maxStip;
if (refuts > 0) {
bml->isTry = true;
}
if ((opt_shortvars == false) && (minStip != maxStip)) {
weedOutShortVars(bml, (unsigned char) opt_moves);
}
} else {
bml->minStip = NOSTIP;
bml->maxStip = NOSTIP;
bml->stipIn = NOSTIP;
}
return bml;
}
static BOARDLIST* norm_final_move(BOARD* inBrd, int move)
{
BOARDLIST* wml;
BOARDLIST* bml;
BOARD* bd;
BOARD* tmp;
BOARD* tmp1;
bool stipAchieved = false;
int ct;
assert(inBrd != NULL);
wml = generateWhiteBoardlist(inBrd, opt_moves);
if (opt_aim == MATE) {
LL_FOREACH_SAFE(wml->vektor, bd, tmp) {
if (bd->check == true) {
bml = generateRefutations(bd, opt_moves);
assert(bml != NULL);
LL_COUNT(bml->vektor, tmp1, ct);
if (ct == 0) {
stipAchieved = true;
bd->tag = '#';
freePosition(bd->pos);
bd->pos = NULL;
} else {
LL_DELETE(wml->vektor, bd);
freeBoard(bd);
}
freeBoardlist(bml);
} else {
LL_DELETE(wml->vektor, bd);
freeBoard(bd);
}
}
} else {
LL_FOREACH_SAFE(wml->vektor, bd, tmp) {
if (bd->check == false) {
bml = generateRefutations(bd, opt_moves);
assert(bml != NULL);
LL_COUNT(bml->vektor, tmp1, ct);
if (ct == 0) {
stipAchieved = true;
bd->tag = '=';
freePosition(bd->pos);
bd->pos = NULL;
} else {
LL_DELETE(wml->vektor, bd);
freeBoard(bd);
}
freeBoardlist(bml);
} else {
LL_DELETE(wml->vektor, bd);
freeBoard(bd);
}
}
}
if (stipAchieved == true) {
BOARDLIST* uml = generateWhiteBoardlist(inBrd, opt_moves);
BOARD* b;
LL_FOREACH(wml->vektor, b) {
qualifyMove(uml, b);
}
freeBoardlist(uml);
}
wml->maxStip =
(stipAchieved == true) ? (unsigned char) opt_moves : NOSTIP;
wml->minStip =
(stipAchieved == true) ? (unsigned char) opt_moves : NOSTIP;
wml->stipIn =
(stipAchieved == true) ? (unsigned char) opt_moves : NOSTIP;
return wml;
}
static BOARDLIST* gloss_first_move(BOARD* brd, int moves)
{
BOARDLIST* wml;
BOARDLIST* bml;
BOARD* b;
BOARD* tmp;
BOARD* tmp1;
unsigned char minStip = NOSTIP;
unsigned char maxStip = 0;
bool bcheck;
bool stipAchieved = false;
int ct;
wml = generateWhiteBoardlist(brd, 1);
LL_FOREACH_SAFE(wml->vektor, b, tmp) {
if (stipAchieved == true) {
LL_DELETE(wml->vektor, b);
freeBoard(b);
} else {
bcheck = b->check;
bml = gloss_blackMove(b, moves);
assert(bml != NULL);
LL_COUNT(bml->vektor, tmp1, ct);
if ((ct == 0) && (opt_aim == MATE)
&& (bcheck == false)) {
LL_DELETE(wml->vektor, b);
freeBoard(b);
freeBoardlist(bml);
} else if ((ct == 0) && (opt_aim == STALEMATE)
&& (bcheck == true)) {
LL_DELETE(wml->vektor, b);
freeBoard(b);
freeBoardlist(bml);
} else if (bml->stipIn == NOSTIP) {
LL_DELETE(wml->vektor, b);
freeBoard(b);
freeBoardlist(bml);
} else {
stipAchieved = true;
b->tag = '!';
b->nextply = bml;
minStip = (bml->stipIn < minStip) ? bml->stipIn : minStip;
maxStip = (bml->stipIn > maxStip) ? bml->stipIn : maxStip;
}
}
}
if (stipAchieved == true) {
wml->minStip = minStip;
wml->maxStip = maxStip;
wml->stipIn = minStip;
BOARDLIST* uml = generateWhiteBoardlist(brd, 1);
BOARD* bb;