Requests a simul match with the given player. That player must have his/her "simopen" flag on in order to accept simul requests. Once a match has started, you will be informed where in line you are. You will play BLACK.
Simmatch can also be used to restart an adjourned simul match, or untimed games in simul form.
See also: simadjourn, simalladjourn, simopen, simuls