Missing testcases - hane, clamp, or cut on the edge

[gunnar]

In the endgame this edge position is relatively frequent,

and depending on the circumstances either of hane, clamp, or cut is the locally best white move. Currently GNU Go in most cases plays hane and never the clamp. This can be fixed by pattern tuning, but first it would be good to have a set of testcases to test against. Ideal would be two or three representable testcases for each of the three moves. (Smaller contributions are of course also welcome. It doesn't have to be done by just one person.)