chessboard-image 1.1.4

Generate beautiful chess board images from FEN notation

Chessboard Image

A pure Python library for generating beautiful chess board images from FEN notation. No external dependencies except Pillow.

Features

✨ Pure Python - No browser dependencies, just PIL/Pillow
🎨 Multiple Themes - Built-in professional piece sets
🎯 FEN Support - Generate boards from any valid FEN notation
📱 Flexible Output - Save as file, get bytes, or PIL Image object
🔧 Player Perspective - View from White or Black's perspective
📍 Coordinates - Optional file/rank labels

Installation

pip install chessboard-image

Quick Start

import chessboard_image as cbi

# Generate starting position
start_fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
cbi.generate_image(start_fen, "board.png", size=400)

Basic Usage

import chessboard_image as cbi

# Basic generation
cbi.generate_image(fen, "board.png", size=400)

# With coordinates
cbi.generate_image(fen, "board.png", show_coordinates=True)

# Black's perspective
cbi.generate_image(fen, "board.png", player_pov="black")

# Different theme
cbi.generate_image(fen, "board.png", theme_name="alpha")

# Get as PIL Image or bytes
pil_image = cbi.generate_pil(fen, size=500)
image_bytes = cbi.generate_bytes(fen)

White Perspective	Black Perspective

Without Coordinates	With Coordinates

Themes

Built-in themes: alpha, wikipedia, uscf, wisteria, sakura, maestro

Wikipedia	Alpha	USCF

Wisteria	Sakura	Maestro

# List available themes
themes = cbi.list_themes()

# Use different theme
cbi.generate_image(fen, "board.png", theme_name="alpha")

CLI Usage

# Basic generation
chessboard-image generate "fen_string" -o board.png

# With options
chessboard-image generate "fen_string" -o board.png -s 600 -t alpha -p black -c

# Options:
# -s, --size: Board size in pixels
# -t, --theme: Theme name  
# -p, --player-pov: white or black perspective
# -c, --coordinates: Show coordinates

Examples

Famous Positions

import chessboard_image as cbi

# Scholar's Mate
scholars_mate = "r1bqkb1r/pppp1Qpp/2n2n2/4p3/2B1P3/8/PPPP1PPP/RNB1K1NR b KQkq - 0 1"
cbi.generate_image(scholars_mate, "scholars_mate.png", size=500)

# Endgame
endgame = "8/1p1b4/p7/3ppk2/6p1/2P4p/PP3B1K/5B2 b - - 0 1"
cbi.generate_image(endgame, "endgame.png", player_pov="black", show_coordinates=True)

# Sicilian Defense
sicilian = "rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq c6 0 2"
cbi.generate_image(sicilian, "sicilian.png", theme_name="alpha")

Scholar's Mate	Endgame (Black POV)	Sicilian Defense

Batch Processing

positions = [
    ("start", "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"),
    ("endgame", "8/1B6/8/8/8/8/1K3Qqr/7k w KQkq - 0 1"),
]

for name, fen in positions:
    cbi.generate_image(fen, f"{name}.png", size=400, show_coordinates=True)

API Reference

Core Functions

generate_image(fen, output_path=None, size=400, theme_name="wikipedia", 
              player_pov="white", show_coordinates=False)
generate_bytes(fen, size=400, theme_name="wikipedia", 
              player_pov="white", show_coordinates=False)  
generate_pil(fen, size=400, theme_name="wikipedia",
            player_pov="white", show_coordinates=False)
list_themes()

Parameters

• fen (str): FEN notation string
• size (int): Board size in pixels (default: 400)
• theme_name (str): Theme name (default: "wikipedia")
• player_pov (str): "white" or "black" perspective (default: "white")
• show_coordinates (bool): Show file/rank labels (default: False)

Custom Themes

Create a JSON file with base64-encoded pieces:

{
  "my_theme": {
    "pieces": {
      "wK": ["data:image/png;base64,..."], "wQ": ["data:image/png;base64,..."],
      "wR": ["data:image/png;base64,..."], "wB": ["data:image/png;base64,..."], 
      "wN": ["data:image/png;base64,..."], "wP": ["data:image/png;base64,..."],
      "bK": ["data:image/png;base64,..."], "bQ": ["data:image/png;base64,..."],
      "bR": ["data:image/png;base64,..."], "bB": ["data:image/png;base64,..."],
      "bN": ["data:image/png;base64,..."], "bP": ["data:image/png;base64,..."]
    },
    "board": ["#F0D9B5", "#B58863"]
  }
}

Use with: cbi.generate_image(fen, "board.png", theme_file="my_themes.json", theme_name="my_theme")

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Development Setup

git clone https://github.com/anandjoshi91/chessboard-image.git
cd chessboard-image
pip install -e .
pip install -r requirements-dev.txt

Running Tests

python -m pytest tests/

Requirements

• Python 3.7+
• Pillow (PIL)

License

This project is licensed under the MIT License - see the LICENSE file for details.

Changelog

1.1.4

• Fixed transparency handling for grayscale piece images (LA mode)
• Now supports RGBA, LA, PA and any image mode with alpha channel
• Fixes issue where pieces with LA mode showed black backgrounds
• Added maestro theme (6 built-in themes total)

1.1.3

• Initial release
• Support for FEN notation
• Built-in 5 themes [alpha, wikipedia, uscf, wisteria, sakura]
• Generate image from pov of black or white player
• Add optional file and rank coordinates