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.
The white pieces and the black
 pieces are fighting each other!
Die weißen und schwarzen 
Steine bekämpfen sich!
Les blancs et les noirs 
se battent !
I pezzi neri e quelli bianchi
 stanno combattendo fra loro!
As peças pretas e brancas estão lutando entre si!