The command that tells the engine that a next search will be from a different game.
Remarks
If the GUI hasn't sent a "ucinewgame" before the first "position" command, the engine
shouldn't expect any further ucinewgame commands as the GUI is probably not supporting
the ucinewgame command. So the engine should not rely on this command even though all
new GUIs should support it. As the engine's reaction to "ucinewgame" can take some time
the GUI should always send "isready" after "ucinewgame" to wait for the engine to
finish its operation.
The command that tells the engine that a next search will be from a different game.
Remarks
If the GUI hasn't sent a "ucinewgame" before the first "position" command, the engine shouldn't expect any further ucinewgame commands as the GUI is probably not supporting the ucinewgame command. So the engine should not rely on this command even though all new GUIs should support it. As the engine's reaction to "ucinewgame" can take some time the GUI should always send "isready" after "ucinewgame" to wait for the engine to finish its operation.