Lee Sedol - Gu Li, 36th encounter

Moves 154 to 163  

With Lee Sedol leans against the weak central stones. This already tells us there's something amiss. threatens to kill the right side. When connects the weak groups, reveals the drama: at the big group at the bottom is dead. This must have been an oversight by Gu Li because the group is too big to lose, but the simplicity of the kill can only be explained by Gu's being ignorant that the big eye was the only eye.