数式に身を捧げた者だからこそ、同じ盤上で指せば、証明の途中にある者と到達した者の差は歴然。
経験値の開きは、詰まらない。しかしながら、

「若い！　若いねェ！　いいと思うヨ？
　若い時分の苦労は買ってでもというらしいし？
　センパイからのありがた～い講義というわけだネ」
「認めない……
　すでに出ている答えだとしても、認めない！
　こういうオトナにだけは、僕はならないからな！」

精神性は、逆行をすることもままあるようで。

「やれやれ、大人げないことだ。
　我が宿敵のこういった姿を見せられるのは、
　筆舌にし難い感慨があると言わざるを得ない……」

When a pair who has devoted their entire lives to mathematics play a game, there is a clear difference between one who is in the middle of constructing a proof and another who has already completed it. And while the gap of experience will never close...

"So young! So green! But that's not a bad thing, really. They say hard work in youth is quiet rest in old age, you know? Consider this a VALUABLE lesson from your elder."

"I will not relent... Even if the answer is already evident, I will not accept it! I will never grow up to be like you!"

However, one's mentality, it seems, can regress.

"Honestly, you both are quite childish. The feeling of witnessing my archenemy in such a state is...difficult to put into words."