Seki-kun starts playing Go on his desk. Yokoi-san tries to ignore this since she doesn't know the rules, but this yet again turns into something rather unexpected.
No fair! Totally unfair!
Gemein! So gemein!
¡Tramposo! ¡Es muy tramposo!
C’est pas du jeu ! 
C’est vraiment pas du jeu !
Che scorretto! Veramente sleale!
Não é justo! Não mesmo!