posledni vereze se spravnymi remizamy

import chess
from typing import Iterator, Optional, Dict, Tuple
from chess import Move, BB_ALL, Bitboard, PieceType, Color
import time
from collections import deque
import threading
from collections import defaultdict

# Definice nových figur
AMAZON = 7
CYRIL = 8
EVE = 9

# Rozšíření seznamu PIECE_SYMBOLS
chess.PIECE_SYMBOLS.append('a')
chess.PIECE_SYMBOLS.append('c')
chess.PIECE_SYMBOLS.append('e')

class CustomBoard(chess.Board):
    def __init__(self, fen=None):
        self.amazons_white = chess.BB_EMPTY
        self.amazons_black = chess.BB_EMPTY
        self.cyrils_white = chess.BB_EMPTY
        self.cyrils_black = chess.BB_EMPTY
        self.eves_white = chess.BB_EMPTY
        self.eves_black = chess.BB_EMPTY
        super().__init__(None)
        if fen:
            self.set_custom_fen(fen)
        self.debug_amazons()
        self.debug_cyrils()
        self.debug_eves()

    def clear_square(self, square):
        super()._remove_piece_at(square)
        self.amazons_white &= ~chess.BB_SQUARES[square]
        self.amazons_black &= ~chess.BB_SQUARES[square]
        self.cyrils_white &= ~chess.BB_SQUARES[square]
        self.cyrils_black &= ~chess.BB_SQUARES[square]
        self.eves_white &= ~chess.BB_SQUARES[square]
        self.eves_black &= ~chess.BB_SQUARES[square]

    def set_custom_fen(self, fen):
        parts = fen.split()
        board_part = parts[0]

        self.clear()
        self.amazons_white = chess.BB_EMPTY
        self.amazons_black = chess.BB_EMPTY
        self.cyrils_white = chess.BB_EMPTY
        self.cyrils_black = chess.BB_EMPTY
        self.eves_white = chess.BB_EMPTY
        self.eves_black = chess.BB_EMPTY

        square = 56
        for c in board_part:
            if c == '/':
                square -= 16
            elif c.isdigit():
                square += int(c)
            else:
                color = chess.WHITE if c.isupper() else chess.BLACK
                if c.upper() == 'A':
                    if color == chess.WHITE:
                        self.amazons_white |= chess.BB_SQUARES[square]
                    else:
                        self.amazons_black |= chess.BB_SQUARES[square]
                    piece_type = AMAZON
                elif c.upper() == 'C':
                    if color == chess.WHITE:
                        self.cyrils_white |= chess.BB_SQUARES[square]
                    else:
                        self.cyrils_black |= chess.BB_SQUARES[square]
                    piece_type = CYRIL
                elif c.upper() == 'E':
                    if color == chess.WHITE:
                        self.eves_white |= chess.BB_SQUARES[square]
                    else:
                        self.eves_black |= chess.BB_SQUARES[square]
                    piece_type = EVE
                elif c == 'P' and chess.square_rank(square) == 7:
                    piece_type = AMAZON
                    color = chess.WHITE
                elif c == 'p' and chess.square_rank(square) == 0:
                    piece_type = AMAZON
                    color = chess.BLACK
                else:
                    piece_type = chess.PIECE_SYMBOLS.index(c.lower())

                self._set_piece_at(square, piece_type, color)
                square += 1

        self.turn = chess.WHITE if parts[1] == 'w' else chess.BLACK
        self.castling_rights = chess.BB_EMPTY
        if '-' not in parts[2]:
            if 'K' in parts[2]: self.castling_rights |= chess.BB_H1
            if 'Q' in parts[2]: self.castling_rights |= chess.BB_A1
            if 'k' in parts[2]: self.castling_rights |= chess.BB_H8
            if 'q' in parts[2]: self.castling_rights |= chess.BB_A8
        self.ep_square = chess.parse_square(parts[3]) if parts[3] != '-' else None


    def _set_piece_at(self, square: chess.Square, piece_type: PieceType, color: Color) -> None:
        self.clear_square(square)
        super()._set_piece_at(square, piece_type, color)
        if piece_type == AMAZON:
            if color == chess.WHITE:
                self.amazons_white |= chess.BB_SQUARES[square]
            else:
                self.amazons_black |= chess.BB_SQUARES[square]
        elif piece_type == CYRIL:
            if color == chess.WHITE:
                self.cyrils_white |= chess.BB_SQUARES[square]
            else:
                self.cyrils_black |= chess.BB_SQUARES[square]
        elif piece_type == EVE:
            if color == chess.WHITE:
                self.eves_white |= chess.BB_SQUARES[square]
            else:
                self.eves_black |= chess.BB_SQUARES[square]

    def piece_at(self, square: chess.Square) -> Optional[chess.Piece]:
        if self.amazons_white & chess.BB_SQUARES[square]:
            return chess.Piece(AMAZON, chess.WHITE)
        elif self.amazons_black & chess.BB_SQUARES[square]:
            return chess.Piece(AMAZON, chess.BLACK)
        elif self.cyrils_white & chess.BB_SQUARES[square]:
            return chess.Piece(CYRIL, chess.WHITE)
        elif self.cyrils_black & chess.BB_SQUARES[square]:
            return chess.Piece(CYRIL, chess.BLACK)
        elif self.eves_white & chess.BB_SQUARES[square]:
            return chess.Piece(EVE, chess.WHITE)
        elif self.eves_black & chess.BB_SQUARES[square]:
            return chess.Piece(EVE, chess.BLACK)
        return super().piece_at(square)

    def generate_pseudo_legal_moves(self, from_mask: Bitboard = BB_ALL, to_mask: Bitboard = BB_ALL) -> Iterator[Move]:
        our_pieces = self.occupied_co[self.turn]
        if self.turn == chess.WHITE:
            our_amazons = self.amazons_white
            our_cyrils = self.cyrils_white
            our_eves = self.eves_white
        else:
            our_amazons = self.amazons_black
            our_cyrils = self.cyrils_black
            our_eves = self.eves_black

        # Generování tahů pro amazonky
        for from_square in chess.scan_forward(our_amazons & from_mask):
            attacks = self.amazon_attacks(from_square)
            valid_moves = attacks & ~our_pieces & to_mask
            for to_square in chess.scan_forward(valid_moves):
                yield Move(from_square, to_square)

        # Generování tahů pro Cyrily
        for from_square in chess.scan_forward(our_cyrils & from_mask):
            attacks = self.cyril_attacks(from_square)
            valid_moves = attacks & ~our_pieces & to_mask
            for to_square in chess.scan_forward(valid_moves):
                yield Move(from_square, to_square)

        # Generování tahů pro Evy
        for from_square in chess.scan_forward(our_eves & from_mask):
            attacks = self.eve_attacks(from_square)
            valid_moves = attacks & ~our_pieces & to_mask
            for to_square in chess.scan_forward(valid_moves):
                yield Move(from_square, to_square)

        # Generování tahů pro standardní figury
        for move in super().generate_pseudo_legal_moves(from_mask, to_mask):
            piece = self.piece_at(move.from_square)
            if piece and piece.piece_type not in [AMAZON, CYRIL, EVE]:
                yield move

    def queen_attacks(self, square):
        return self.bishop_attacks(square) | self.rook_attacks(square)

    def bishop_attacks(self, square):
        return chess.BB_DIAG_ATTACKS[square][self.occupied & chess.BB_DIAG_MASKS[square]]

    def rook_attacks(self, square):
        return (chess.BB_RANK_ATTACKS[square][self.occupied & chess.BB_RANK_MASKS[square]] |
                chess.BB_FILE_ATTACKS[square][self.occupied & chess.BB_FILE_MASKS[square]])

    def amazon_attacks(self, square):
        return self.queen_attacks(square) | chess.BB_KNIGHT_ATTACKS[square]

    def cyril_attacks(self, square):
        return self.rook_attacks(square) | chess.BB_KNIGHT_ATTACKS[quare]

    def eve_attacks(self, square):
        return self.bishop_attacks(square) | chess.BB_KNIGHT_ATTACKS[square]

    def is_pseudo_legal(self, move):
        from_square = move.from_square
        to_square = move.to_square
        piece = self.piece_at(from_square)

        if not piece or piece.color != self.turn:
            return False

        if self.occupied_co[self.turn] & chess.BB_SQUARES[to_square]:
            return False

        if self.is_castling(move):
            return True

        if piece.piece_type == AMAZON:
            return bool(self.amazon_attacks(from_square) & chess.BB_SQUARES[to_square])
        elif piece.piece_type == CYRIL:
            return bool(self.cyril_attacks(from_square) & chess.BB_SQUARES[to_square])
        elif piece.piece_type == EVE:
            return bool(self.eve_attacks(from_square) & chess.BB_SQUARES[to_square])
        else:
            return super().is_pseudo_legal(move)

    def is_legal(self, move):
        if not self.is_pseudo_legal(move):
            return False

        from_square = move.from_square
        to_square = move.to_square
        piece = self.piece_at(from_square)
        captured_piece = self.piece_at(to_square)

        # Kontrola pro všechny figury: nelze brát figuru stejné barvy
        if captured_piece and captured_piece.color == piece.color:
            return False

        # Dočasně provést tah
        self.clear_square(from_square)
        self._set_piece_at(to_square, piece.piece_type, piece.color)

        # Najít pozici krále
        king_square = to_square if piece.piece_type == chess.KING else self.king(self.turn)

        # Kontrola, zda je král v šachu po tahu
        is_check = self._is_attacked_by(not self.turn, king_square) if king_square is not None else False

        # Vrátit pozici do původního stavu
        self.clear_square(to_square)
        self._set_piece_at(from_square, piece.piece_type, piece.color)
        if captured_piece:
            self._set_piece_at(to_square, captured_piece.piece_type, captured_piece.color)

        return not is_check


    def _is_attacked_by(self, color, square):
        attackers = self.attackers(color, square)
        return bool(attackers)

    def attackers(self, color: Color, square: chess.Square) -> Bitboard:
        if square is None:
            return chess.BB_EMPTY

        attackers = chess.BB_EMPTY
        occupied = self.occupied
        occupied_co = self.occupied_co[color]

        # Jezdci
        attackers |= chess.BB_KNIGHT_ATTACKS[square] & self.knights & occupied_co

        # Král
        attackers |= chess.BB_KING_ATTACKS[square] & self.kings & occupied_co

        # Pěšci
        if color == chess.WHITE:
            attackers |= chess.BB_PAWN_ATTACKS[chess.BLACK][square] & self.pawns & occupied_co
        else:
            attackers |= chess.BB_PAWN_ATTACKS[chess.WHITE][square] & self.pawns & occupied_co

        # Střelcové útoky (včetně dam a amazonek)
        bishop_attacks = chess.BB_DIAG_ATTACKS[square][occupied & chess.BB_DIAG_MASKS[square]]
        attackers |= bishop_attacks & ((self.bishops | self.queens) & occupied_co)

        # Věžové útoky (včetně dam, amazonek a cyrilů)
        rook_attacks = (
            chess.BB_RANK_ATTACKS[square][occupied & chess.BB_RANK_MASKS[square]] |
            chess.BB_FILE_ATTACKS[square][occupied & chess.BB_FILE_MASKS[square]]
        )
        attackers |= rook_attacks & ((self.rooks | self.queens) & occupied_co)

        # Amazonky (Dáma + Jezdec)
        amazons = self.amazons_white if color == chess.WHITE else self.amazons_black
        amazon_attacks = bishop_attacks | rook_attacks | chess.BB_KNIGHT_ATTACKS[square]
        attackers |= amazon_attacks & amazons

        # Cyrilové (Věž + Jezdec)
        cyrils = self.cyrils_white if color == chess.WHITE else self.cyrils_black
        cyril_attacks = rook_attacks | chess.BB_KNIGHT_ATTACKS[square]
        attackers |= cyril_attacks & cyrils

        # Evy (Střelec + Jezdec)
        eves = self.eves_white if color == chess.WHITE else self.eves_black
        eve_attacks = bishop_attacks | chess.BB_KNIGHT_ATTACKS[square]
        attackers |= eve_attacks & eves

        return attackers

    def push(self, move):
        if not self.is_legal(move):
            raise ValueError(f"Move {move} is not legal in position {self.fen()}")

        piece = self.piece_at(move.from_square)
        captured_piece = self.piece_at(move.to_square)

        self.clear_square(move.from_square)
        self.clear_square(move.to_square)
        self._set_piece_at(move.to_square, piece.piece_type, piece.color)

        self.turn = not self.turn

        self.move_stack.append((move, captured_piece))

    def pop(self):
        if not self.move_stack:
            return None

        move, captured_piece = self.move_stack.pop()

        piece = self.piece_at(move.to_square)

        self.clear_square(move.from_square)
        self.clear_square(move.to_square)

        self._set_piece_at(move.from_square, piece.piece_type, piece.color)

        if captured_piece:
            self._set_piece_at(move.to_square, captured_piece.piece_type, captured_piece.color)

        self.turn = not self.turn

        return move

    def is_check(self):
        king_square = self.king(self.turn)
        if king_square is None:
            return False
        is_check = self._is_attacked_by(not self.turn, king_square)
        return is_check

    def is_checkmate(self):
        if not self.is_check():
            return False
        legal_moves = list(self.generate_legal_moves())
        return len(legal_moves) == 0

    def is_game_over(self):
        return self.is_checkmate() or self.is_stalemate() or self.is_insufficient_material()

    def is_stalemate(self):
        if self.is_check():
            return False
        legal_moves = list(self.generate_legal_moves())
        return len(legal_moves) == 0

    def is_insufficient_material(self):
        return (self.pawns | self.rooks | self.queens | self.amazons_white | self.amazons_black |
                self.cyrils_white | self.cyrils_black | self.eves_white | self.eves_black) == 0 and (
            chess.popcount(self.occupied) <= 3
        )

    def generate_legal_moves(self, from_mask=chess.BB_ALL, to_mask=chess.BB_ALL):
        for move in self.generate_pseudo_legal_moves(from_mask, to_mask):
            if self.is_legal(move):
                yield move

    def debug_amazons(self):
        pass

    def debug_cyrils(self):
        pass

    def debug_eves(self):
        pass

    def piece_symbol(self, piece):
        if piece is None:
            return '.'
        if piece.piece_type == AMAZON:
            return 'A' if piece.color == chess.WHITE else 'a'
        if piece.piece_type == CYRIL:
            return 'C' if piece.color == chess.WHITE else 'c'
        if piece.piece_type == EVE:
            return 'E' if piece.color == chess.WHITE else 'e'
        return piece.symbol()

    def piece_type_at(self, square):
        if (self.amazons_white | self.amazons_black) & chess.BB_SQUARES[square]:
            return AMAZON
        if (self.cyrils_white | self.cyrils_black) & chess.BB_SQUARES[square]:
            return CYRIL
        if (self.eves_white | self.eves_black) & chess.BB_SQUARES[square]:
            return EVE
        return super().piece_type_at(square)

    def color_at(self, square):
        if self.amazons_white & chess.BB_SQUARES[square]:
            return chess.WHITE
        if self.amazons_black & chess.BB_SQUARES[square]:
            return chess.BLACK
        if self.cyrils_white & chess.BB_SQUARES[square]:
            return chess.WHITE
        if self.cyrils_black & chess.BB_SQUARES[square]:
            return chess.BLACK
        if self.eves_white & chess.BB_SQUARES[square]:
            return chess.WHITE
        if self.eves_black & chess.BB_SQUARES[square]:
            return chess.BLACK
        return super().color_at(square)

    @property
    def legal_moves(self):
        return list(self.generate_legal_moves())

    def __str__(self):
        builder = []
        for square in chess.SQUARES_180:
            piece = self.piece_at(square)
            symbol = self.piece_symbol(piece) if piece else '.'
            builder.append(symbol)
            if chess.square_file(square) == 7:
                if square != chess.H1:
                    builder.append('\n')
        return ''.join(builder)

def format_time(seconds):
    hours, remainder = divmod(seconds, 3600)
    minutes, seconds = divmod(remainder, 60)
    return f"{int(hours):02d}h {int(minutes):02d}m {int(seconds):02d}s"

def print_elapsed_time(stop_event, start_time):
    while not stop_event.is_set():
        elapsed_time = time.time() - start_time
        print(f"\rUplynulý čas: {format_time(elapsed_time)}", end="", flush=True)
        time.sleep(1)

def simplify_fen(fen):
    return ' '.join(fen.split()[:4])


def calculate_optimal_moves(start_fen: str) -> Dict[str, Tuple[int, str]]:
    print(f"Počáteční FEN: {start_fen}")
    board = CustomBoard(start_fen)
    if not board.is_valid():
        raise ValueError("Neplatný FEN")

    POZ = {1: start_fen}
    AR = defaultdict(lambda: {'used': False, 'to_end': None, 'depth': 0, 'type': 'normal', 'position_count': defaultdict(int)})
    AR[start_fen]['position_count'][board.epd()] = 1
    N = 1
    M = 0

    transposition_table = {}

    start_time = time.time()
    current_depth = 0
    positions_at_depth = defaultdict(int)
    depth_start_time = start_time

    stop_event = threading.Event()
    timer_thread = threading.Thread(target=print_elapsed_time, args=(stop_event, start_time))
    timer_thread.start()

    try:
        print("Začínám generovat pozice...")
        print("Počáteční pozice:")
        print_board(start_fen)

        # Generate all positions
        while M < N:
            M += 1
            current_fen = POZ[M]
            board.set_custom_fen(current_fen)
            current_depth = AR[current_fen]['depth']

            if positions_at_depth[current_depth] == 0 and current_depth > 0:
                depth_time = time.time() - depth_start_time
                total_time = time.time() - start_time
                print(f"\nHloubka {current_depth - 1}: {positions_at_depth[current_depth - 1]} pozic, "
                      f"Čas hloubky: {format_time(depth_time)} / Celkový čas: {format_time(total_time)}")
                depth_start_time = time.time()

            positions_at_depth[current_depth] += 1

            if not AR[current_fen]['used']:
                AR[current_fen]['used'] = True
                for move in board.legal_moves:
                    board.push(move)
                    new_fen = board.fen()
                    new_epd = board.epd()
                    AR[new_fen]['position_count'][new_epd] += 1
                    if new_fen not in POZ.values():
                        N += 1
                        POZ[N] = new_fen
                        AR[new_fen]['depth'] = current_depth + 1
                    board.pop()

            if stop_event.is_set():
                print("Výpočet byl přerušen uživatelem.")
                return {}

        # Print last depth
        depth_time = time.time() - depth_start_time
        total_time = time.time() - start_time
        print(f"\nHloubka {current_depth}: {positions_at_depth[current_depth]} pozic, "
              f"Čas hloubky: {format_time(depth_time)} / Celkový čas: {format_time(total_time)}")

        print(f"Generování pozic dokončeno. Celkový počet pozic: {N}")

        # Initial evaluation
        print("\nZačínám počáteční ohodnocení...")
        F_checkmate = F_stalemate = F_drawing = F_check = F_normal = 0
        for i in range(1, N + 1):
            current_fen = POZ[i]
            board.set_custom_fen(current_fen)
            simplified_current_fen = simplify_fen(current_fen)

            if board.is_checkmate():
                AR[simplified_current_fen]['to_end'] = -1000 if board.turn == chess.WHITE else 1000
                AR[simplified_current_fen]['type'] = 'checkmate'
                F_checkmate += 1
            elif board.is_stalemate():
                AR[simplified_current_fen]['to_end'] = 0
                AR[simplified_current_fen]['type'] = 'stalemate'
                F_stalemate += 1
            elif board.is_insufficient_material():
                AR[simplified_current_fen]['to_end'] = 0
                AR[simplified_current_fen]['type'] = 'insufficient_material'
                F_drawing += 1
            elif max(AR[simplified_current_fen]['position_count'].values()) >= 3:
                AR[simplified_current_fen]['to_end'] = 0
                AR[simplified_current_fen]['type'] = 'threefold_repetition'
                F_drawing += 1
            elif board.halfmove_clock >= 100:
                AR[simplified_current_fen]['to_end'] = 0
                AR[simplified_current_fen]['type'] = 'fifty_move_rule'
                F_drawing += 1
            elif board.is_check():
                AR[simplified_current_fen]['to_end'] = None
                AR[simplified_current_fen]['type'] = 'check'
                F_check += 1
            else:
                AR[simplified_current_fen]['to_end'] = None
                AR[simplified_current_fen]['type'] = 'normal'
                F_normal += 1

        print(f"Počet pozic v matu je {F_checkmate}")
        print(f"Počet pozic v patu je {F_stalemate}")
        print(f"Počet pozic v remíze je {F_drawing}")
        print(f"Počet pozic v šachu je {F_check}")
        print(f"Počet normálních pozic je {F_normal}")

        print("\nZačínám iterativní ohodnocení...")
        uroven = 0
        while True:
            uroven += 1
            level_start_time = time.time()
            print(f"Výpočet v úrovni {uroven}")

            changed = False
            current_level_positions = 0
            for fen in POZ.values():
                simplified_fen = simplify_fen(fen)
                if simplified_fen in transposition_table:
                    AR[simplified_fen]['to_end'], AR[simplified_fen]['type'] = transposition_table[simplified_fen]
                    continue

                if AR[simplified_fen]['to_end'] is None or (AR[simplified_fen]['to_end'] == 0 and AR[simplified_fen]['type'] == 'normal'):
                    board.set_custom_fen(fen)
                    hod = float('-inf') if board.turn == chess.WHITE else float('inf')
                    all_moves_evaluated = True
                    all_moves_draw = True
                    for move in board.legal_moves:
                        board.push(move)
                        new_fen = simplify_fen(board.fen())
                        if new_fen in transposition_table:
                            hod2 = -transposition_table[new_fen][0]
                        elif AR[new_fen]['to_end'] is not None:
                            hod2 = -AR[new_fen]['to_end']
                        else:
                            all_moves_evaluated = False
                            board.pop()
                            continue
                        if hod2 != 0:
                            all_moves_draw = False
                        if board.turn == chess.WHITE:
                            hod = max(hod, hod2)
                        else:
                            hod = min(hod, hod2)
                        board.pop()

                    if not all_moves_evaluated:
                        continue

                    if all_moves_draw:
                        new_to_end = 0
                        new_type = 'drawing'
                    elif hod == 1001 - uroven:
                        new_to_end = 1000 - uroven
                        new_type = 'winning'
                    elif hod == -1001 + uroven:
                        new_to_end = -1000 + uroven
                        new_type = 'losing'
                    elif hod == 0:
                        new_to_end = 0
                        new_type = 'drawing'
                    elif hod != float('-inf') and hod != float('inf'):
                        new_to_end = hod
                        new_type = 'normal'
                    else:
                        new_to_end = 0
                        new_type = 'drawing'

                    if AR[simplified_fen]['to_end'] != new_to_end or AR[simplified_fen]['type'] != new_type:
                        AR[simplified_fen]['to_end'] = new_to_end
                        AR[simplified_fen]['type'] = new_type
                        transposition_table[simplified_fen] = (new_to_end, new_type)
                        changed = True
                        current_level_positions += 1

            level_end_time = time.time()
            total_elapsed_time = level_end_time - start_time
            level_elapsed_time = level_end_time - level_start_time
            print(f"Nalezeno {current_level_positions} pozic v úrovni {uroven}")
            print(f"Čas úrovně: {format_time(level_elapsed_time)} / Celkový čas: {format_time(total_elapsed_time)}")

            if not changed:
                print("Hodnocení ukončeno - žádné další změny.")
                break

            if stop_event.is_set():
                print("Výpočet byl přerušen uživatelem.")
                return {}

        print(f"Celkem nalezeno {sum(1 for data in AR.values() if data['to_end'] is not None)} ohodnocených pozic")

        print("\nVýpočet dokončen.")
        return {fen: (data['to_end'], data['type']) for fen, data in AR.items() if data['to_end'] is not None}

    finally:
        stop_event.set()
        timer_thread.join()


def print_board(fen):
    board = chess.Board(fen)
    print(board)

def find_min_positive_value(AR):
    min_positive_value = float('inf')
    min_fen = None

    for fen, (value, type_pozice) in AR.items():
        if value is not None and value > 0 and value < min_positive_value:
            min_positive_value = value
            min_fen = fen

    if min_positive_value == float('inf'):
        print("Žádná kladná hodnota nebyla nalezena.")
    else:
        print(f"Nejmenší kladná hodnota: {min_positive_value}, FEN: {min_fen}")

def format_time(seconds):
    hours, remainder = divmod(seconds, 3600)
    minutes, seconds = divmod(remainder, 60)
    return f"{int(hours):02d}h {int(minutes):02d}m {int(seconds):02d}s"

def print_elapsed_time(stop_event, start_time):
    while not stop_event.is_set():
        elapsed_time = time.time() - start_time
        print(f"\rUplynulý čas: {format_time(elapsed_time)}", end="", flush=True)
        time.sleep(1)

if __name__ == "__main__":
    start_fen = "8/5R2/8/8/2K5/8/kr6/8 w - - 0 1"

    try:
        AR = calculate_optimal_moves(start_fen)
    except KeyboardInterrupt:
        print("\nVýpočet byl přerušen uživatelem.")
        exit()

    find_min_positive_value(AR)

    simplified_start_fen = start_fen
    if simplified_start_fen in AR:
        value, position_type = AR[simplified_start_fen]
        print(f"Počáteční pozice: Hodnota = {value}, Typ = {position_type}")
        if value == 0:
            print("Pozice je vyhodnocena jako remíza.")
        elif value > 0:
            print("Bílý má výhodu.")
        else:
            print("Černý má výhodu.")
    else:
        print("Počáteční pozice nebyla vyhodnocena.")

    current_fen = start_fen
    optimal_moves = []

    while True:
        board = CustomBoard(current_fen)
        if board.is_game_over():
            break

        if current_fen not in AR:
            print(f"Pozice {current_fen} není v AR.")
            break

        current_value, current_type = AR[current_fen]

        best_move = None
        best_value = float('-inf') if board.turn == chess.WHITE else float('inf')
        for move in board.legal_moves:
            board.push(move)
            new_fen = board.fen()
            board.pop()
            if new_fen in AR:
                move_value = AR[new_fen][0]
                if (board.turn == chess.WHITE and move_value > best_value) or (board.turn == chess.BLACK and move_value < best_value):
                    best_value = move_value
                    best_move = move

        if best_move is None:
            print("Žádný další tah nebyl nalezen.")
            break

        board.push(best_move)
        optimal_moves.append((current_fen, best_move, board.fen()))
        current_fen = board.fen()

    print("\nOptimální tahy:")
    print("Počáteční pozice:")
    print_board(start_fen)
    hodnota, typ_pozice = AR[start_fen]
    print(f"Hodnota: {hodnota}, Typ: {typ_pozice}")
    print(start_fen)
    print("\n")

    for from_fen, move, to_fen in reversed(optimal_moves):
        print_board(from_fen)
        print(f"Tah: {move}")
        hodnota, typ_pozice = AR[to_fen]
        print(f"Hodnota: {hodnota}, Typ: {typ_pozice}")
        print(to_fen)
        print("\n")

    if optimal_moves:
        print("Konečná pozice:")
        final_fen = optimal_moves[-1][2]  # Poslední 'to_fen'
        print_board(final_fen)
        hodnota, typ_pozice = AR[final_fen]
        print(f"Hodnota: {hodnota}, Typ: {typ_pozice}")
        print(final_fen)
        print("\n")
    else:
        print("Žádné optimální tahy nebyly nalezeny.")