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chess.h
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//
// chess.h
// PlutoCE
//
// Created by Davide Fassio on 19/09/2019.
// GNU GENERAL PUBLIC LICENSE v3.0
//
// Check operating system
// 0: not defined
// 1: Mac OS
// 2: Windows
// 3: Linux
#if defined(__APPLE__)
#define OS 1
#elif defined(_WIN32)
#define OS 2
#elif defined(__linux__)
#define OS 3
#endif
#ifndef OS
#define OS 0
#endif
#ifndef chess_h
#define chess_h
#include <iostream>
#include <cstdlib>
class Board{
public:
// Functions
void move(char*, int);
void AImove(int);
int isCheck(int*, int);
void set_treeDepth(int);
void set_board(int*);
int* get_board();
void print_bestMove(int);
void displayBoard(int);
private:
// Pieces values
const int whitePawn = 100;
const int whiteKnight = 310;
const int whiteBishop = 320;
const int whiteRook = 500;
const int whiteQueen = 900;
const int whiteKing = 1000000;
const int blackPawn = -100;
const int blackKnight = -310;
const int blackBishop = -320;
const int blackRook = -500;
const int blackQueen = -900;
const int blackKing = -1000000;
// Pieces on the board
int board[64] = {500, 310, 320, 900, 1000000, 320, 310, 500, 100, 100, 100, 100, 100, 100, 100, 100, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -100, -100, -100, -100, -100, -100, -100, -100, -500, -310, -320, -900, -1000000, -320, -310, -500};
int boardCopy[64];
// Right to castel: 1 = castel is possible, 0 = castel is not possible
// 0: white kingside, 1: white queenside, 2: black kingside, 3: black queenside
int castling_rights[4] = {1, 1, 1, 1};
// Capture en-pasant: 1 = can be captured en pasant, 0 = can't be captured en-pasant
int captured_enpasant[64] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
// Piece-square table for better evaluation
const int whitePawn_eval[64] = {0, 0, 0, 0, 0, 0, 0, 0, 5, 10, 10,-20,-20, 10, 10, 5, 5, -5,-10, 0, 0,-10, -5, 5, 0, 0, 0, 20, 20, 0, 0, 0, 5, 5, 10, 25, 25, 10, 5, 5, 10, 10, 20, 30, 30, 20, 10, 10, 50, 50, 50, 50, 50, 50, 50, 50, 0, 0, 0, 0, 0, 0, 0, 0};
const int whitePawn_passed[64] = {0, 0, 0, 0, 0, 0, 0, 0, 40, 30, 30, 40, 40, 30, 30, 40, 50, 40, 40, 50, 50, 40, 40, 50, 60, 50, 50, 60, 60, 50, 50, 60, 70, 60, 60, 70, 70, 60, 60, 70, 90, 90, 90, 90, 90, 90, 90, 90, 80, 70, 70, 80, 80, 70, 70, 80, 0, 0, 0, 0, 0, 0, 0, 0};
const int whiteKnight_eval[64] = {-50, -40, -30, -30, -30, -30, -40, -50, -40, -20, 0, 5, 5, 0, -20, -40, -30, 5, 10, 15, 15, 10, 5, -30, -30, 0, 15, 20, 20, 15, 0, -30, -30, 5, 15, 20, 20, 15, 5, -30, -30, 0, 10, 15, 15, 10, 0, -30, -40, -20, 0, 0, 0, 0, -20, -40, -50, -40, -30, -30, -30, -30, -40, -50};
const int whiteBishop_eval[64] = {-20, -10, -10, -10, -10, -10, -10, -20, -10, 5, 0, 0, 0, 0, 5, -10, -10, 10, 10, 10, 10, 10, 10, -10, -10, 0, 10, 10, 10, 10, 0, -10, -10, 5, 5, 10, 10, 5, 5, -10, -10, 0, 5, 10, 10, 5, 0, -10, -10, 0, 0, 0, 0, 0, 0, -10, -20, -10, -10, -10, -10, -10, -10, -20};
const int whiteRook_eval[64] = {0, 0, 0, 5, 5, 0, 0, 0, -5, 0, 0, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 0, 0, -5, 5, 10, 10, 10, 10, 10, 10, 5, 0, 0, 0, 0, 0, 0, 0, 0};
const int whiteQueen_eval[64] = {-20, -10, -10, -5, -5, -10, -10, -20, -10, 0, 5, 0, 0, 0, 0, -10, -10, 5, 5, 5, 5, 5, 0, -10, 0, 0, 5, 5, 5, 5, 0, -5, -5, 0, 5, 5, 5, 5, 0, -5, -10, 0, 5, 5, 5, 5, 0, -10, -10, 0, 0, 0, 0, 0, 0, -10, -20, -10, -10, -5, -5, -10, -10, -20};
const int whiteKing_middleGame_eval[64] = {20, 30, 10, 0, 0, 10, 30, 20, 20, 20, 0, 0, 0, 0, 20, 20, -10, -20, -20, -20,-20, -20, -20, -10, -20, -30, -30, -40,-40, -30, -30, -20, -30, -40, -40, -50,-50, -40, -40, -30, -30, -40, -40, -50,-50, -40, -40, -30, -30, -40, -40, -50,-50, -40, -40, -30, -30, -40, -40, -50,-50, -40, -40, -30};
const int whiteKing_endGame_eval[64] = {-50, -30, -30, -30, -30, -30, -30, -50, -30, -30, 0, 0, 0, 0, -30, -30, -30, -10, 20, 30, 30, 20, -10, -30, -30, -10, 30, 40, 40, 30, -10, -30, -30, -10, 30, 40, 40, 30, -10, -30, -30, -10, 20, 30, 30, 20, -10, -30, -30, -20, -10, 0, 0, -10, -20, -30, -50, -40, -30, -20, -20, -30, -40, -50};
const int blackPawn_eval[64] = {0, 0, 0, 0, 0, 0, 0, 0, -50, -50, -50, -50, -50, -50, -50, -50, -10, -10, -20, -30, -30, -20, -10, -10, -5, -5, -10, -25, -25, -10, -5, -5, 0, 0, 0, -20, -20, 0, 0, 0, -5, 5, 10, 0, 0, 10, 5, -5, -5, -10, -10, 20, 20, -10, -10, -5, 0, 0, 0, 0, 0, 0, 0, 0};
const int blackPawn_passed[64] = {0, 0, 0, 0, 0, 0, 0, 0, -90, -90, -90, -90, -90, -90, -90, -90, -80, -70, -70, -80, -80, -70, -70, -80, -70, -60, -60, -70, -70, -60, -60, -70, -60, -50, -50, -60, -60, -50, -50, -60, -50, -40, -40, -50, -50, -40, -40, -50, -40, -30, -30, -40, -40, -30, -30, -40, 0, 0, 0, 0, 0, 0, 0, 0};
const int blackKnight_eval[64] = {50, 40, 30, 30, 30, 30, 40, 50, 40, 20, 0, 0, 0, 0, 20, 40, 30, 0, -10, -15, -15, -10, 0, 30, 30, -5, -15, -20, -20, -15, -5, 30, 30, 0, -15, -20, -20, -15, 0, 30, 30, -5, -10, -15, -15, -10, -5, 30, 40, 20, 0, -5, -5, 0, 20, 40, 50, 40, 30, 30, 30, 30, 40, 50};
const int blackBishop_eval[64] = {20, 10, 10, 10, 10, 10, 10, 20, 10, 0, 0, 0, 0, 0, 0, 10, 10, 0, -5, -10, -10, -5, 0, 10, 10, -5, -5, -10, -10, -5, -5, 10, 10, 0, -10, -10, -10, -10, 0, 10, 10, -10, -10, -10, -10, -10, -10, 10, 10, -5, 0, 0, 0, 0, -5, 10, 20, 10, 10, 10, 10, 10, 10, 20};
const int blackRook_eval[64] = {0, 0, 0, 0, 0, 0, 0, 0, -5, -10, -10, -10, -10, -10, -10, -5, 5, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, -5, -5, 0, 0, 0};
const int blackQueen_eval[64] = {20, 10, 10, 5, 5, 10, 10, 20, 10, 0, 0, 0, 0, 0, 0, 10, 10, 0, -5, -5, -5, -5, 0, 10, 5, 0, -5, -5, -5, -5, 0, 5, 0, 0, -5, -5, -5, -5, 0, 5, 10, -5, -5, -5, -5, -5, 0, 10, 10, 0, -5, 0, 0, 0, 0, 10, 20, 10, 10, 5, 5, 10, 10, 20};
const int blackKing_middleGame_eval[64] = {30, 40, 40, 50, 50, 40, 40, 30, 30, 40, 40, 50, 50, 40, 40, 30, 30, 40, 40, 50, 50, 40, 40, 30, 30, 40, 40, 50, 50, 40, 40, 30, 20, 30, 30, 40, 40, 30, 30, 20, 10, 20, 20, 20, 20, 20, 20, 10, -20, -20, 0, 0, 0, 0, -20, -20, -20, -30, -10, 0, 0, -10, -30, -20};
const int blackKing_endGame_eval[64] = {50, 40, 30, 20, 20, 30, 40, 50, 30, 20, 10, 0, 0, 10, 20, 30, 30, 10, -20, -30, -30, -20, 10, 30, 30, 10, -30, -40, -40, -30, 10, 30, 30, 10, -30, -40, -40, -30, 10, 30, 30, 10, -20, -30, -30, -20, 10, 30, 30, 30, 0, 0, 0, 0, 30, 30, 50, 30, 30, 30, 30, 30, 30, 50};
int treeDepth = 5; // Default value
int bestMoveEvaluation[4]; // evaluation, start, land, promotion
// Functions
int evaluate(int*);
int* treeRoot(int);
int tree(int*, int, int*, int*, int, int, int);
int* copyArr(int*, int);
};
/*
Function that move the pieces on the board
Parameters:
- char *move = 6 element string containing
- the move (4 char)
- the code of the piece to promote in case of promotion (1 char) example: Queen = Q, Knight = N
Use capital letters for the promotion
- isWhiteMoving: 1 -> white is moving, 0 -> black is moving
*/
void Board::move(char *move, int isWhiteMoving){
// check the move if is correct
int moveIsCorrect = 0; // Starting with illegal
// the move is in form y1r1y2r2
// example the move 1.Nf3 is g1f3
int f1 = (int)move[0] - 97;
int r1 = (int)move[1] - 49;
int f2 = (int)move[2] - 97;
int r2 = (int)move[3] - 49;
int start = r1*8 + f1;
int land = r2*8 + f2;
if(r1 >= 0 && r1 < 8 && f1 >= 0 && f1 < 8 && r2 >= 0 && r2 < 8 && f2 >= 0 && f2 < 8){
if(isWhiteMoving == 1){
// Remove all the right to capture a white pawn en-pasant
for(int j = 0; j < 8; j++)
this->captured_enpasant[24 + j] = 0;
if(this->board[start] > 0 && this->board[land] <= 0){
switch (this->board[start]){
case 100: // Pawn
if(r1 == 1){ // Starting square
if(land - start == 16 && this->board[start + 8] == 0 && this->board[land] == 0){
moveIsCorrect = 1;
this->captured_enpasant[land] = 1;
}
else if(land - start == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((land - start == 7 || land - start == 9) && this->board[land] < 0)
moveIsCorrect = 1;
}
else if(r1 == 4){ // En-pasant capture
// Normal moves
if(land - start == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((land - start == 7 || land - start == 9) && this->board[land] < 0)
moveIsCorrect = 1;
// En-pasant captures
else if(land - start == 9 && this->captured_enpasant[start + 1] == 1){
moveIsCorrect = 1;
this->board[start + 1] = 0;
}
else if(land - start == 7 && this->captured_enpasant[start - 1] == 1){
moveIsCorrect = 1;
this->board[start - 1] = 0;
}
}
else if(r1 == 6){ // Promotion
switch (move[4]) {
case 'N':
this->board[start] = 310;
break;
case 'B':
this->board[start] = 320;
break;
case 'R':
this->board[start] = 500;
break;
case 'Q':
this->board[start] = 900;
break;
default:
std::cout << "The move made is illegal!" << std::endl;
exit(0);
break;
}
if(land - start == 8 && this->board[land] == 0){
moveIsCorrect = 1;
}
else if((land - start == 7 || land - start == 9) && this->board[land] < 0){
moveIsCorrect = 1;
}
}
else{ // Every other rank
if(land - start == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((land - start == 7 || land - start == 9) && this->board[land] < 0)
moveIsCorrect = 1;
}
break;
case 310: // Knight
if(abs(r2 - r1) + abs(f2 - f1) == 3)
moveIsCorrect = 1;
break;
case 320: // Bishop
if(abs(r2 - r1) == abs(f2 - f1)){
int kr = (r2 - r1 > 0) ? 1 : -1;
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + (i*kr*8) + (i*kf)] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case 500: // Rook
// White lose the castling rights
if(start == 0) // queenside
this->castling_rights[1] = 0;
else if(start == 7) //kingside
this->castling_rights[0] = 0;
if(r1 == r2){
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(f2 - f1); i++){
if(this->board[start + i*kf] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
else if(f1 == f2){
int kr = (r2 - r1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + i*kr*8] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case 900: // Queen
// Move like a bishop
if(abs(r2 - r1) == abs(f2 - f1)){
int kr = (r2 - r1 > 0) ? 1 : -1;
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + (i*kr*8) + (i*kf)] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
// Or like a rook
else if(r1 == r2){
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(f2 - f1); i++){
if(this->board[start + i*kf] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
else if(f1 == f2){
int kr = (r2 - r1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + i*kr*8] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case 1000000: // King
if(abs(r2 - r1) < 2 && abs(f2 - f1) < 2){
moveIsCorrect = 1;
}
else if(this->castling_rights[0] == 1 && land == 6 && this->board[5] == 0 && this->board[6] == 0){
// Control checks in the way
if(this->isCheck(this->board, 1) == 0){
this->board[4] = 0;
this->board[5] = 1000000;
if(this->isCheck(this->board, 1) == 0){
this->board[5] = 0;
this->board[6] = 1000000;
if(this->isCheck(this->board, 1) == 0){
moveIsCorrect = 1;
// Restore king's position
this->board[4] = 1000000;
this->board[6] = 0;
// Move the rook
this->board[7] = 0;
this->board[5] = 500;
}
}
}
}
else if(this->castling_rights[1] == 1 && land == 2 && this->board[3] == 0 && this->board[2] == 0 && this->board[1] == 0){
// Control checks in the way
if(this->isCheck(this->board,1) == 0){
this->board[4] = 0;
this->board[3] = 1000000;
if(this->isCheck(this->board,1) == 0){
this->board[3] = 0;
this->board[2] = 1000000;
if(this->isCheck(this->board,1) == 0){
moveIsCorrect = 1;
// Restore king's position
this->board[4] = 1000000;
this->board[2] = 0;
// Move the rook
this->board[0] = 0;
this->board[3] = 500;
}
}
}
}
// white lose all castling rights
this->castling_rights[0] = this->castling_rights[1] = 0;
break;
}
}
}
else if(isWhiteMoving == 0){
// Remove all the right to capture a black pawn en-pasant
for(int j = 0; j < 8; j++)
this->captured_enpasant[32 + j] = 0;
if(this->board[start] < 0 && this->board[land] >= 0){
switch (this->board[start]){
case -100: // Pawn
if(r1 == 6){ // Starting square
if(start - land == 16 && this->board[start - 8] == 0 && this->board[land] == 0){
moveIsCorrect = 1;
this->captured_enpasant[land] = 1;
}
else if(start - land == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((start - land == 7 || start - land == 9) && this->board[land] > 0)
moveIsCorrect = 1;
}
else if(r1 == 3){ // En-pasant capture
// Normal moves
if(start - land == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((start - land == 7 || start - land == 9) && this->board[land] > 0)
moveIsCorrect = 1;
// En-pasant captures
else if(start - land == 7 && this->captured_enpasant[start + 1] == 1){
moveIsCorrect = 1;
this->board[start + 1] = 0;
}
else if(start - land == 9 && this->captured_enpasant[start - 1] == 1){
moveIsCorrect = 1;
this->board[start - 1] = 0;
}
}
else if(r1 == 1){ // Promotion
switch (move[4]) {
case 'N':
this->board[start] = -310;
break;
case 'B':
this->board[start] = -320;
break;
case 'R':
this->board[start] = -500;
break;
case 'Q':
this->board[start] = -900;
break;
default:
std::cout << "The move made is illegal!" << std::endl;
exit(0);
break;
}
if(start - land == 8 && this->board[land] == 0){
moveIsCorrect = 1;
}
else if((start - land == 7 || start - land == 9) && this->board[land] > 0){
moveIsCorrect = 1;
}
}
else{ // Every other rank
if(start - land == 8 && this->board[land] == 0)
moveIsCorrect = 1;
else if((start - land == 7 || start - land == 9) && this->board[land] > 0)
moveIsCorrect = 1;
}
break;
case -310: // Knight
if(abs(r2 - r1) + abs(f2 - f1) == 3)
moveIsCorrect = 1;
break;
case -320: // Bishop
if(abs(r2 - r1) == abs(f2 - f1)){
int kr = (r2 - r1 > 0) ? 1 : -1;
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + (i*kr*8) + (i*kf)] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case -500: // Rook
// White lose the castling rights
if(start == 56) // queenside
this->castling_rights[3] = 0;
else if(start == 63) //kingside
this->castling_rights[2] = 0;
if(r1 == r2){
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(f2 - f1); i++){
if(this->board[start + i*kf] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
else if(f1 == f2){
int kr = (r2 - r1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + i*kr*8] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case -900: // Queen
// Move like a bishop
if(abs(r2 - r1) == abs(f2 - f1)){
int kr = (r2 - r1 > 0) ? 1 : -1;
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + (i*kr*8) + (i*kf)] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
// Or like a rook
else if(r1 == r2){
int kf = (f2 - f1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(f2 - f1); i++){
if(this->board[start + i*kf] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
else if(f1 == f2){
int kr = (r2 - r1 > 0) ? 1 : -1;
int allEmpty = 1;
for(int i = 1; i < abs(r2 - r1); i++){
if(this->board[start + i*kr*8] != 0)
allEmpty = 0;
}
if(allEmpty == 1)
moveIsCorrect = 1;
}
break;
case -1000000: // King
if(abs(r2 - r1) < 2 && abs(f2 - f1) < 2){
moveIsCorrect = 1;
}
else if(this->castling_rights[2] == 1 && land == 62 && this->board[61] == 0 && this->board[62] == 0){
// Control checks in the way
if(this->isCheck(this->board, 0) == 0){
this->board[60] = 0;
this->board[61] = -1000000;
if(this->isCheck(this->board, 0) == 0){
this->board[61] = 0;
this->board[62] = -1000000;
if(this->isCheck(this->board, 0) == 0){
moveIsCorrect = 1;
// Restore king's position
this->board[60] = -1000000;
this->board[62] = 0;
// Move the rook
this->board[63] = 0;
this->board[61] = -500;
}
}
}
}
else if(this->castling_rights[3] == 1 && land == 58 && this->board[59] == 0 && this->board[58] == 0 && this->board[57] == 0){
// Control checks in the way
if(this->isCheck(this->board, 0) == 0){
this->board[60] = 0;
this->board[59] = -1000000;
if(this->isCheck(this->board, 0) == 0){
this->board[59] = 0;
this->board[58] = -1000000;
if(this->isCheck(this->board, 0) == 0){
moveIsCorrect = 1;
// Restore king's position
this->board[60] = -1000000;
this->board[58] = 0;
// Move the rook
this->board[56] = 0;
this->board[59] = -500;
}
}
}
}
// black lose all castling rights
this->castling_rights[2] = this->castling_rights[3] = 0;
break;
}
}
}
}
else{
std::cout << "The move made is illegal!" << std::endl;
exit(0);
}
if(moveIsCorrect == 1){
this->board[land] = this->board[start];
this->board[start] = 0;
if(this->isCheck(this->board, isWhiteMoving) == 1){
std::cout << "The move made is illegal!" << std::endl;
exit(0);
}
}
else{
std::cout << "The move made is illegal!" << std::endl;
exit(0);
}
}
// The AI make a move and print out
void Board::AImove(int isWhiteMoving){
int* temp;
char move[6];
temp = this->treeRoot(isWhiteMoving);
int f1 = temp[1] % 8;
int r1 = (temp[1] - f1) / 8;
int f2 = temp[2] % 8;
int r2 = (temp[2] - f2) / 8;
// Add the promotions
switch(std::abs(temp[3])){
case 310:
move[4] = 'N';
break;
case 320:
move[4] = 'B';
break;
case 500:
move[4] = 'R';
break;
case 900:
move[4] = 'Q';
break;
default:
move[4] = NULL;
break;
}
move[0] = (char) (f1 + 97);
move[1] = (char) (r1 + 49);
move[2] = (char) (f2 + 97);
move[3] = (char) (r2 + 49);
std::cout << move << std::endl;
this->move(move, isWhiteMoving);
}
// Control if there are checks on the board:
// - isWhiteKing = 1 -> white king under check
// - isWhiteKing = 0 -> black king under check
// Return value: 1 -> true, 0 -> false
int Board::isCheck(int *board, int isWhiteKing){
if(isWhiteKing == 1){
int index = 0;
for(int k = 0; k < 64; k++){
if(board[k] == 1000000){
index = k;
break;
}
}
int f = index % 8;
int r = (index - f) / 8;
// Check from knights
if(r+2 >= 0 && r+2 < 8 && f+1 >= 0 && f+1 < 8 && board[index + 17] == -310)
return 1;
if(r+1 >= 0 && r+1 < 8 && f+2 >= 0 && f+2 < 8 && board[index + 10] == -310)
return 1;
if(r-1 >= 0 && r-1 < 8 && f+2 >= 0 && f+2 < 8 && board[index - 6] == -310)
return 1;
if(r-2 >= 0 && r-2 < 8 && f+1 >= 0 && f+1 < 8 && board[index - 15] == -310)
return 1;
if(r-2 >= 0 && r-2 < 8 && f-1 >= 0 && f-1 < 8 && board[index - 17] == -310)
return 1;
if(r-1 >= 0 && r-1 < 8 && f-2 >= 0 && f-2 < 8 && board[index - 10] == -310)
return 1;
if(r+1 >= 0 && r+1 < 8 && f-2 >= 0 && f-2 < 8 && board[index + 6] == -310)
return 1;
if(r+2 >= 0 && r+2 < 8 && f-1 >= 0 && f-1 < 8 && board[index + 15] == -310)
return 1;
// Check from bishops/queens
for(int i = 1; r + i < 8 && f + i < 8; i++){
if(i == 1){ // Check from pawns
if(board[index + 9*i] == -100)
return 1;
}
if(board[index + 9*i] == -320 || board[index + 9*i] == -900)
return 1;
if(board[index + 9*i] != 0)
break;
}
for(int i = 1; r - i >= 0 && f + i < 8; i++){
if(board[index - 7*i] == -320 || board[index - 7*i] == -900)
return 1;
if(board[index - 7*i] != 0)
break;
}
for(int i = 1; r - i >= 0 && f - i >= 0; i++){
if(board[index - 9*i] == -320 || board[index - 9*i] == -900)
return 1;
if(board[index - 9*i] != 0)
break;
}
for(int i = 1; r + i < 8 && f - i >= 0; i++){
if(i == 1){ // Check from pawns
if(board[index + 7*i] == -100)
return 1;
}
if(board[index + 7*i] == -320 || board[index + 7*i] == -900)
return 1;
if(board[index + 7*i] != 0)
break;
}
// Check from rook/queens
for(int i = 1; r + i < 8; i++){
if(board[index + 8*i] == -500 || board[index + 8*i] == -900)
return 1;
if(board[index + 8*i] != 0)
break;
}
for(int i = 1; f + i < 8; i++){
if(board[index + i] == -500 || board[index + i] == -900)
return 1;
if(board[index + i] != 0)
break;
}
for(int i = 1; r - i >= 0; i++){
if(board[index - 8*i] == -500 || board[index - 8*i] == -900)
return 1;
if(board[index - 8*i] != 0)
break;
}
for(int i = 1; f - i >= 0; i++){
if(board[index - i] == -500 || board[index - i] == -900)
return 1;
if(board[index - i] != 0)
break;
}
}
else{
int index = 0;
for(int k = 63; k >= 0; k--){
if(board[k] == -1000000){
index = k;
break;
}
}
int f = index % 8;
int r = (index - f) / 8;
// Check from knights
if(r+2 >= 0 && r+2 < 8 && f+1 >= 0 && f+1 < 8 && board[index + 17] == 310)
return 1;
if(r+1 >= 0 && r+1 < 8 && f+2 >= 0 && f+2 < 8 && board[index + 10] == 310)
return 1;
if(r-1 >= 0 && r-1 < 8 && f+2 >= 0 && f+2 < 8 && board[index - 6] == 310)
return 1;
if(r-2 >= 0 && r-2 < 8 && f+1 >= 0 && f+1 < 8 && board[index - 15] == 310)
return 1;
if(r-2 >= 0 && r-2 < 8 && f-1 >= 0 && f-1 < 8 && board[index - 17] == 310)
return 1;
if(r-1 >= 0 && r-1 < 8 && f-2 >= 0 && f-2 < 8 && board[index - 10] == 310)
return 1;
if(r+1 >= 0 && r+1 < 8 && f-2 >= 0 && f-2 < 8 && board[index + 6] == 310)
return 1;
if(r+2 >= 0 && r+2 < 8 && f-1 >= 0 && f-1 < 8 && board[index + 15] == 310)
return 1;
// Check from bishops/queens
for(int i = 1; r + i < 8 && f + i < 8; i++){
if(board[index + 9*i] == 320 || board[index + 9*i] == 900)
return 1;
if(board[index + 9*i] != 0)
break;
}
for(int i = 1; r - i >= 0 && f + i < 8; i++){
if(i == 1){ // Check from pawns
if(board[index - 7*i] == 100)
return 1;
}
if(board[index - 7*i] == 320 || board[index - 7*i] == 900)
return 1;
if(board[index - 7*i] != 0)
break;
}
for(int i = 1; r - i >= 0 && f - i >= 0; i++){
if(i == 1){ // Check from pawns
if(board[index - 9*i] == 100)
return 1;
}
if(board[index - 9*i] == 320 || board[index - 9*i] == 900)
return 1;
if(board[index - 9*i] != 0)
break;
}
for(int i = 1; r + i < 8 && f - i >= 0; i++){
if(board[index + 7*i] == 320 || board[index + 7*i] == 900)
return 1;
if(board[index + 7*i] != 0)
break;
}
// Check from rook/queens
for(int i = 1; r + i < 8; i++){
if(board[index + 8*i] == 500 || board[index + 8*i] == 900)
return 1;
if(board[index + 8*i] != 0)
break;
}
for(int i = 1; f + i < 8; i++){
if(board[index + i] == 500 || board[index + i] == 900)
return 1;
if(board[index + i] != 0)
break;
}
for(int i = 1; r - i >= 0; i++){
if(board[index - 8*i] == 500 || board[index - 8*i] == 900)
return 1;
if(board[index - 8*i] != 0)
break;
}
for(int i = 1; f - i >= 0; i++){
if(board[index - i] == 500 || board[index - i] == 900)
return 1;
if(board[index - i] != 0)
break;
}
}
// No checks
return 0;
}
// Set the tree's search depth
void Board::set_treeDepth(int depth){
if(depth > 0)
this->treeDepth = depth;
else
this->treeDepth = 5;
}
// Set the board position
// There must be 2 kings on the board
void Board::set_board(int* board){
int whiteKingCount = 0;
int blackKingCount = 0;
for(int i = 0; i < 64; i++){
this->board[i] = board[i];
if(this->board[i] == 1000000)
whiteKingCount++;
if(this->board[i] == -1000000)
blackKingCount++;
}
if(whiteKingCount != 1 || blackKingCount != 1){
std::cout << "Error setting up the board!" << std::endl;
exit(1);
}
}
// Get a 64 int array containing the current board state
int* Board::get_board(){
for(int i = 0; i < 64; i++)
this->boardCopy[i] = this->board[i];
return this->boardCopy;
}
void Board::print_bestMove(int isWhiteMoving){
int* temp;
char move[6];
temp = this->treeRoot(isWhiteMoving);
std::cout << "Board evaluation = " << temp[0] / 100.0 << std::endl;
int f1 = temp[1] % 8;
int r1 = (temp[1] - f1) / 8;
int f2 = temp[2] % 8;
int r2 = (temp[2] - f2) / 8;
// Add the promotions
switch(std::abs(temp[3])){
case 310:
move[4] = 'N';
break;
case 320:
move[4] = 'B';
break;
case 500:
move[4] = 'R';
break;
case 900:
move[4] = 'Q';
break;
default:
move[4] = NULL;
break;
}
move[0] = (char) (f1 + 97);
move[1] = (char) (r1 + 49);
move[2] = (char) (f2 + 97);
move[3] = (char) (r2 + 49);
std::cout << move << std::endl;
}
// Define ANSI codes for Mac OS
#define WHITE_LIGHT "\x1b[37;46m"
#define WHITE_DARK "\x1b[37;42m"
#define BLACK_LIGHT "\x1b[30;46m"
#define BLACK_DARK "\x1b[30;42m"
#define NORMAL "\x1b[0m"
/* TODO
CHANGE THE DISPLAY
+---+---+---+---+---+---+---+---+
| R | N | B | Q | K | B | N | R |
+---+---+---+---+---+---+---+---+
| P | P | P | P | P | P | P | P |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| | | | | | | | |
+---+---+---+---+---+---+---+---+
| P | P | P | P | P | P | P | P |
+---+---+---+---+---+---+---+---+
| R | N | B | Q | K | B | N | R |
+---+---+---+---+---+---+---+---+
Better vision also without colors.
*/
// Display the board
// Parameter: view mode 1 or 2
void Board::displayBoard(int view){
std::cout << std::endl;
switch (view) {
case 1:
// Display the board using only ASCII characters
// Compatible with all OS
for(int i = 7; i >= 0; i--){
for(int j = 0; j < 8; j++){
switch (this->board[i*8 + j]) {
case 0:
std::cout << "00 ";
break;
case 100:
std::cout << "WP ";
break;
case 310:
std::cout << "WN ";
break;
case 320:
std::cout << "WB ";
break;
case 500:
std::cout << "WR ";
break;
case 900:
std::cout << "WQ ";
break;
case 1000000:
std::cout << "WK ";
break;
case -100:
std::cout << "BP ";
break;
case -310:
std::cout << "BN ";
break;
case -320:
std::cout << "BB ";
break;
case -500:
std::cout << "BR ";
break;
case -900:
std::cout << "BQ ";