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chessputzer's Introduction

Chessputzer recognizes chess positions. Use the web interface (easier!) or follow these instructions for the command line.

Examples

For best results, include the border of the chessboard and crop close to it. If parts of the diagram are blurry and harder to decipher, the algorithm makes the best guess based on other pieces on the board.

Note: the program is intended for fonts that usually appear in print. Images created by chess software might not work.

Please let me know if you have examples of books and images that cause problems.

Have fun!


Chessputzer was inspired by Fenbot but the internals are quite different. It is designed for scanned images using popular fonts, with plenty of noise and artifacts. Our aim is to do less, but tolerate more.

How it works

  1. Cropping and Cutting where we detect the boundary of the chessboard and split it up into 64 squares.

  2. Filtering and Matching where we rediscover the ancient technique of template matching. And spend many happy hours removing the stripes from the dark squares.

  3. Error correction where we admit that the board probably does not have six knights on it, and make the best guess.

  4. Deep Learning where we turn to the twenty-first century alchemists.

chessputzer's People

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chessputzer's Issues

ItemsView Object not subcriptable

while running putzmain.py, there is an error:

Traceback (most recent call last):
File "C:\Users\Owner\Desktop\putzmain.py", line 215, in
alltemps = np.load('pbarrs.npz').items()[0][1]
TypeError: 'ItemsView' object is not subscriptable

Error when running command line version (putzmain.py)

Traceback (most recent call last):
  File "<frozen runpy>", line 189, in _run_module_as_main
  File "<frozen runpy>", line 112, in _get_module_details
  File "/home/user/programming/chess/putzmain.py", line 216, in <module>
    alltemps = np.load('pbarrs.npz').items()[0][1]
               ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^
TypeError: 'ItemsView' object is not subscriptable

This error occurs simply when trying to run the script normally like so:

python3 -m putzmain.py -f board.png -o out.txt

Add castling when possible

When reading a diagram, especially for puzzle ones, one should always assume that castling is possible. I think the FEN should include the castling rights when possible.

Chessputzer on the command line error

I tried to use Chessputzer on the command line, but I got an error:

d:\chessputzer-master>putzmain.py -f board09.png
Traceback (most recent call last):
File "D:\chessputzer-master\putzmain.py", line 238, in
bd = Board(fname)
File "D:\chessputzer-master\putzmain.py", line 34, in init
self.squares = splitboardcontour(self.ima)
File "D:\chessputzer-master\putzlib.py", line 180, in splitboardcontour
bounds = contourbox(ima)
File "D:\chessputzer-master\putzlib.py", line 199, in contourbox
,contours, = cv2.findContours(ee, 1, 2)
ValueError: not enough values to unpack (expected 3, got 2)

Several error when running from Python

Traceback (most recent call last):
File "/usr/lib/python3.9/runpy.py", line 188, in _run_module_as_main
mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
File "/usr/lib/python3.9/runpy.py", line 111, in _get_module_details
import(pkg_name)
File "/home/cesar/Chess/chessputzer/putzmain.py", line 11, in
import cv2
ModuleNotFoundError: No module named 'cv2'

where to find putznn.py ?

In the file commandlinenn.md there's file putznn.py mentioned briefly.
I wonder, if you could put this file somewhere in the repository, please?

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