The easiest way is probably to make “playing briscola” a separate action, triggered by the command “play briscola”. This won’t cause any problems with the compiler.
If you wanted several customized responses, you could use a table like this, adapted from chapter 5.4 of the recipe book:
Playing is an action applying to one topic. Understand "play [text]" as playing.
Report playing: say "You are not very good at this game."
Instead of playing a topic listed in the Table of Playing Responses: say "[response entry][paragraph break]".
Table of Playing Responses
"Briscola" "Good job!"
"Pinochle" "LOL, nope."
"Uno" "What a numpty!"