| All you need to know about Carpenter's Square-15 |
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 Previous | Index | Next   Diagram 15.1: White to play Black's condition appears to be slightly better than in Shape 14 because of the extra  Diagram 15.2: White fails While  Diagram 15.3: Solution 1
 Diagram 15.4: white is tricked
 Diagram 15.5: Variation
 Diagram 15.6: Solution 2 Luckily for white, the right solution is still at To summarise: surprisingly the extra bend doesn't help black. White can following either Diagram 15.3 or Diagram 15.6 to kill the corner. Just remember that 1-2 is the key point. Previous | Index | Next |
bend.
What can white do now?
works well in Diagram 14.4, it doesn't work here.
The extra bend 
, note that white can only form a seki by playing 'a' (this is not Bulky Five).
are forcing moves.
White can form an eye in the corner to win the capturing race by one liberty.
Black 'a' instead of 
doesn't help either as the common liberty belong to the side with an eye.
So black corner is killed.
doesn't feel like a good move but white needs to be careful.
, although black's shape is very ugly, white cannot kill it.
is a famous tesuji to create a ko fight. 
doesn't work either but black need to know to play 
is the best move, leaving 'a' and 'b' as miai points, resulting in Eye versus No Eye capturing race.