- JavaScript chessboard powered by <a href="http://chessboardjs.com/">chessboard.js</a>.
- Arrows by <a href="http://jsplumbtoolkit.com">jsPlumb</a>—who would think you could
- draw such beautiful arrows in just 161 kB of JavaScript on top of the
- 323 kB needed for jQuery and jQuery UI? How far technology has come. If you want something
- more retro, the <a href="/text.pl">text interface</a> is still available.</p>