If anyone is in the mood to play around with a small feature that I'm the process of adding, go to
http://triplechain.net/free_move
It's an open board with no placement restrictions and all dice available. It's still pretty rough, but should be functional. Just a couple things to note:
- to remove a die from the board, drag it to the gray square on the left
- "new game" doesn't work yet. If you hit new game, back, then refresh you'll get a clear board though.