[Example of keywords use]
[absolutely non-sense game]
e2-e4 c7c6
@showboard
@clearboard
@showboard
@configwhite
d4 Nf6
Nc3 @showboard d5
@configblack
Kg8
@startplay
@whitesmove
Nc3-b1
@showboard
@blacksmove
Rg8-g7 @showboard d5-d6
Rg7-f6
@null