BlunderFree Chess Trainer

Play any move that doesn't blunder!

0.0
Moves
Loading engine...
Why it's bad:
0/0
Play as:
Play both sides to set up a position
18
80

Eval threshold: ±0.5 pawns

Open Source Licenses

Arasan Chess Engine
Copyright 1994-2026 Jon Dart
MIT License
github.com/jdart1/arasan-chess
Fathom (Syzygy Tablebase Probing)
Copyright 2013-2018 Ronald de Man, basil00, Jon Dart
MIT License
github.com/jdart1/Fathom
chess.js
Copyright 2020 Jeff Hlywa
BSD-2-Clause License
github.com/jhlywa/chess.js
chessboard.js
Copyright 2019 Chris Oakman
MIT License
chessboardjs.com
jQuery
Copyright OpenJS Foundation and contributors
MIT License
jquery.com