aclat, 6k* versus jansteen, 3d* (1994-04-16)

Diagram 13: Cool answer

In the real game: Index * Backward * Forward
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From this diagram:

diagram 13

A "cool" move, preventing white to slide with o18. It allows black to enclose the corner though, and virtually connect his stones with....
Allowing this is slightly hard to bear for black.