[Aide] Python : jeu d'echec

Bonjour,

J'aimerais créer un jeu d'echec en python (seulement avec pygame/sdl2 sans python-chess),

mais malheureuseent j suis deja coincé dans le positionnement des pieces, je n'arrive pas a faire en sorte de bien positionner les pieces selon la cases, par exemple e4 serait a x = ... et y = ..

mais j'ai du mal a situer avec pygame, surtout au niveau de x, voila le resultat actuel :
 

voila le code (ne faite ps attention a la variable turn elle est censé instauré la notion de tours, par exemple turn = 0 le tour des blanc, mais si turn = 1 alors ceux des noirs, ne faites egalement pas très attention au classes, elle sont pour l'instant pas trop utilisé pour quoi ils ont été)

import pygame


class Board:
    def __init__(self, size=8):
        self.size = size
        self.grid = [['' for _ in range(size)] for _ in range(size)]

    def get_square(self, x, y):
        return self.grid[y][x]

    def set_square(self, x, y, piece):
        self.grid[y][x] = piece

    def is_square_empty(self, x, y):
        return self.get_square(x, y) == ''

    def is_valid_square(self, x, y):
        return 0 <= x < self.size and 0 <= y < self.size

    def clear(self):
        self.grid = [['' for _ in range(self.size)] for _ in range(self.size)]


class Piece:
    def __init__(self, image, position):
        self.image = image
        self.rect = self.image.get_rect()
        self.rect.x, self.rect.y = position


class Pawn(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


class Rook(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


class Knight(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


class Bishop(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


class Queen(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


class King(Piece):
    def __init__(self, image, position):
        super().__init__(image, position)


def load():
    board = pygame.image.load('assets/board.png')
    window.blit(board, (0, 0))
    white_pieces = {}
    black_pieces = {}
    turn = 0

    # Créer les pions blancs
    for i in range(8):
        name = f"pawn_{i}_white"
        image = pygame.image.load("assets/white/pawn.png")
        position = ((i + 0.5) * 75, 510)  # calculer la position centrale de la case
        white_pieces[name] = Pawn(image, position)

    # Créer les pions noirs
    for i in range(8):
        name = f"pawn_{i}_black"
        image = pygame.image.load("assets/black/pawn.png")
        position = ((i + 0.5) * 70,  87)  # calculer la position centrale de la case
        black_pieces[name] = Pawn(image, position)

    # Créer les autres pièces blanches
    white_pieces["rook_0_white"] = Rook(pygame.image.load("assets/white/rook.png"), (0, 560))
    white_pieces["rook_1_white"] = Rook(pygame.image.load("assets/white/rook.png"), (560, 560))
    white_pieces["knight_0_white"] = Knight(pygame.image.load("assets/white/knight.png"), (70, 560))
    white_pieces["knight_1_white"] = Knight(pygame.image.load("assets/white/knight.png"), (490, 560))
    white_pieces["bishop_0_white"] = Bishop(pygame.image.load("assets/white/bishop.png"), (140, 560))
    white_pieces["bishop_1_white"] = Bishop(pygame.image.load("assets/white/bishop.png"), (420, 560))
    white_pieces["queen_white"] = Queen(pygame.image.load("assets/white/queen.png"), (280, 560))
    white_pieces["king_white"] = King(pygame.image.load("assets/white/king.png"), (210, 560))

    # Créer les autres pièces noires
    black_pieces["rook_0_black"] = Rook(pygame.image.load("assets/black/rook.png"), (0, 0))
    black_pieces["rook_1_black"] = Rook(pygame.image.load("assets/black/rook.png"), (560, 0))
    black_pieces["knight_0_black"] = Knight(pygame.image.load("assets/black/knight.png"), (70, 0))
    black_pieces["knight_1_black"] = Knight(pygame.image.load("assets/black/knight.png"), (490, 0))
    black_pieces["bishop_0_black"] = Bishop(pygame.image.load("assets/black/bishop.png"), (140, 0))
    black_pieces["bishop_1_black"] = Bishop(pygame.image.load("assets/black/bishop.png"), (420, 0))
    black_pieces["queen_black"] = Queen(pygame.image.load("assets/black/queen.png"), (280, 0))
    black_pieces["king_black"] = King(pygame.image.load("assets/black/king.png"), (210, 0))

    return board, white_pieces, black_pieces, turn


def display_pieces(white_pieces, black_pieces):
    for piece in white_pieces.values():
        window.blit(piece.image, piece.rect)
    for piece in black_pieces.values():
        window.blit(piece.image, piece.rect)


def main():
    board, white_pieces, black_pieces, turn = load()
    display_pieces(white_pieces, black_pieces)
    pygame.display.flip()
    # Boucle principale
    running = True
    while running:
        # Gestion des événements
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                running = False

        # Affichage du plateau et des pièces
        window.blit(board, (0, 0))
        for piece in white_pieces.values():
            window.blit(piece.image, piece.rect)
        for piece in black_pieces.values():
            window.blit(piece.image, piece.rect)

        pygame.display.flip()

    pygame.quit()


if __name__ == '__main__':
    pygame.init()
    window_size = (670, 670)
    window = pygame.display.set_mode(window_size)
    pygame.display.set_caption("pyChess")
    main()