Need help with winboard setup

[hgm]

The way I wrote it, with /mg=10, it would only play 10 games.

Some times playing in match mode gives trouble, because some engines do not react immedately when WiB tells them the game is over. (If the game ends by mate, they usually know it, but if it ends because the opponent resigns, or they themselves forfeit on time, they might continue thinkinguntil they produc a move. That move can then come in the next game, where it might be an illegal one.

Make sure the pause between games is large enough to allow for one more move (/matchPause=..., the default is 10 sec).