stellar

Aspiration Window, UCI skip unknown

2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/ CMakeLists.txt b/ CMakeLists.txt

@@ -3,7 +3,7 @@ set(CMAKE_EXPORT_COMPILE_COMMANDS ON) project( Stellar

VERSION 0.0.12

VERSION 0.0.13

DESCRIPTION "Chess engine written in C" HOMEPAGE_URL https://git.dimitrijedobrota.com/stellar.git LANGUAGES C

diff --git a/ src/engine/engine.c b/ src/engine/engine.c

@@ -17,6 +17,9 @@ #define FULL_DEPTH 4 #define REDUCTION_LIMIT 3

#define INFINITY 50000

#define WINDOW 50

typedef struct Stats Stats; struct Stats { long nodes;

@@ -231,12 +234,19 @@ void move_print_UCI(Move move) { void search_position(const Board *board, int depth) { Stats stats = {0};

for (int crnt = 1; crnt <= depth; crnt++) {

int alpha = -INFINITY, beta = INFINITY;

for (int crnt = 1; crnt <= depth;) {

stats.follow_pv = 1;

int score = negamax(&stats, board, -50000, 50000, crnt);

int score = negamax(&stats, board, alpha, beta, crnt);

if (score <= alpha || score >= beta) {

alpha = -INFINITY;

beta = INFINITY;

}

alpha = score - 50;

beta = score + 50;

printf("info score cp %4d depth %2d nodes %10ld pv ", score, crnt,

printf("info score cp %d depth %d nodes %ld pv ", score, crnt,

stats.nodes); for (int i = 0; i < stats.pv_length[0]; i++) {

@@ -244,6 +254,8 @@ void search_position(const Board *board, int depth) { printf(" "); } printf("\n");

crnt++;

} printf("bestmove ");

@@ -381,13 +393,16 @@ Board *Instruction_parse(Instruction *self, Board *board) { } if (strcmp(token, "go") == 0) {

token = Instruction_token_next(self);

int depth = 6;

if (token && strcmp(token, "depth") == 0) {

token = Instruction_token_next(self);

depth = atoi(token);

} else {

printf("Unknown argument after go\n");

for (token = Instruction_token_next(self); token;

token = Instruction_token_next(self)) {

if (token && strcmp(token, "depth") == 0) {

token = Instruction_token_next(self);

depth = atoi(token);

} else {

printf("Unknown argument %s after go\n", token);

}

} search_position(board, depth); continue;

@@ -402,7 +417,6 @@ Board *Instruction_parse(Instruction *self, Board *board) { print_info(); continue; }

} while ((token = Instruction_token_next(self))); return board;