Brilliant tesuji, found by Yamashita Keigo
Yamashita, 9p sometimes plays cosmic Go, like Takemiya Masaki, 9p, but this strategy was not good against O Rissei.
O Rissei, 9p is a big expert of reducing moyos and saving weak groups.
So, during the 27th Kisei titlematch, Yamashita tried different strategy and successfully won the match
Pay attention to Black's brilliant move #69! This move finished the game early