As of 29 April 2020, Chess.com supports playing online simuls (simultaneous exhibitions) against human opponents. To enable, users must select the setting "Play Multiple Games at a Time" at chess.com/settings/live. Enabling the "Auto Switch Game" setting, "Chess.com will automatically take the simulgiver to the game in which they ...


In the game linked in the OP, play would have likely continued 16...exd5 17.exd5 Nxd5 18.Nxd5 Bxd5 19.Rfd1. Black can try 19...Bb6, although the chances to create anything serious against the doubled b pawns are slim. However, a simul is a team game. Accepting a draw means there is one less board for the strong player to think over. As a consequence, one ...


If nothing else, you can register several accounts, and open several games in different windows. I don't know whether that will set off flags, though, and it would be less convenient than something specifically set up for simuls.

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