CAMEO 7 SOLUTION TO "JUMP" PROBLEM

Black wins by 1 point

Failure

It is too solid to defend with Black 1. White can push in at 2 and Black has to live with 3. Black has 2 points of territory, White has 6 - a big loss.

Correct

Resolutely blocking at 1 is the right answer. After White connects at 2, Black plays 3 and has 7 points of territory to White's 6. Black wins by 1 point.

Variation

White can resist against Black 1 by cutting at 2, but Black can atari at 3 then capture at 5. Now if White 'a', Black 'b' leads to a capturing race, but it is one that White cannot win.