The 'ear-reddening game' is known as a representative match of Honinbo Shusaku.
Refers specifically to the move that caused the ear-reddening, while 耳赤の一局 refers to the entire game.
From 耳 (ear) + 赤 (red) + の (possessive particle) + 一局 (one game). The name derives from the story that a move by Honinbo Shusaku caused his opponent's ears to redden.