What is the purpose of white 1 ?
White 1 is to prevent black 2 hane.
Black 2 could only jump to advance, then white 3 bend, it is the key moment. How could black manage both the corner and the stones on the edge?
Failure： In the real game, black 1, 3 tried to strengthen the corner, but after white 4 advanced, both the corner nor the stones on the edge are settled. Black is in a disadvantage.
Black 1 jump is a tesuji, black can capture the three white stones, but after white sarcrifice...
White is winning!
Black 1 is the solution, if white 2 jump, black 3 hane is successful.
If white 2 save the three stones, black 3 hane could demobilize the white stones on the left! Black succeess!
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