Notes on reading boards.
How the recognizer works, where it fails, and what we measured. RSS
Reading 100-year-old chess books with a neural network
Hatched squares, outline pieces and yellowed paper. How we built a real test set from Wikisource and took exact-board accuracy on 1920s book diagrams from 24% to 84%.
How to turn a chess screenshot into a FEN
Paste a screenshot, get the exact position as a FEN in about a second. What the string means, what an image cannot tell you, and how to get a clean read every time.