EVENT
BOARDSIZE 19
SETUP W D17 D16 C14 C12 D4 F3 C8 D8 L16 K16 J16 H15 G15 F15 J14 K14 K13 L12 L3
SETUP W Q9 Q10 Q11 R11 Q13 R13 R14 S14 S15 P14 
SETUP B C6 D10 E14 F17 G16 H16 J17 K17 L17 H13 J13 K12 K11 L13 M13 Q3 R5 R8 R9
SETUP B R10 R17 R15 Q15 Q16 Q14 O14 P13 P12 Q12 
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   Gouging out Eyes
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Depriving your opponent's stones of their base  is another effective
technique for setting up an attack. This Diagram provides an
example.

The nine white stones on the right side are out in the center
and they cannot be separated. 
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B 1 S12
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But Black can peep at 1, and ...
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W 2 R12
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... White is forced to connect at 2.
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B 3 S11
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Black links up to his stones below and the white stones are without
eyes.
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W 4 Q8
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They must now find security in the center, so White expands her
presence in there with 4 ...
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B 5 Q7
W 6 P7
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... and 6. But White 6 is not really sente, so ...
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B 7 M4
MARK \t@L3
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... Black can lean on the marked stone with the shoulder hit
of 7. This move could also be called a splitting or a double
attack.
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W 8 L4
B 9 M6
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Fierce fighting will ensue in the center as White struggles to
save her stones above. Black clearly has the initiative.

In the 136 problems that follow, consider these principles and
techniques as you try to find the best moves.

[End of Introduction]
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