otb-chess

Play over-the-board. Analyze online.

Explore your games like never before

Automatically track chess games on a physical board. Perfect for casual play at home, with friends, or at the club.

  • Real-time move detection using computer vision
  • Export games for analysis
  • Works with most chess sets and board types
  • Try it for free — runs entirely in your browser
How it works: Camera tracks physical board moves
Camera access required for move detection. No personal data is stored or transmitted.
Hold your board steady in the camera frame
Positioning guide
Did you know?
Live training data Pick a folder before you play — samples save there as you go.
Move debug ?debug=1
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before
after
pixel diff
dense view

            

            
            
            

                

                    

                        

                            Black
                            ∞
                        

                        

                            

                                
                            

                        

                        

                            White
                            ∞
                        

                    


                    

                    
                    
                


                
                

                    
Notation