Problem diagram.
Black's response to White's marked stone?

Source:
American Go Journal, Vol. 20, No. 2, 1985, p. 19
"Ten Commandments of Go"

Solution follows    (or click here to download SGF)

Failure.
Black 1 violates Commandment 5: Discard the small, cling to the big. Capturing the 2 White stones is by no means a small move, but White's follow up at 2 is much bigger, because the stone abuts againsts Black's incomplete lower left position.

Correct.
Black 1 is a big move in the opening. When White jumps out to the center with 2, Black must keep pressing with 3. Black is threatening to create a large territory in the lower left side, while White still has a weak group in the bottom right.

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