One-Two-Three example 2

Just escape  

Here White must get out to the centre. But it is better simply to play , than to play atari on .

Not needed  

here is poor style. White has lost the chance of a ladder with White at , and still must play .

Additionally, has forced Black to strengthen . The two stones + are much stronger than the single stone was.

Black's mistake?  

here looks like a possible mistake of the same type. Omitting and simply playing at is normally better style in attacking.

A tewari diagram  

Using the tewari technique, we can ask: would Black really play here? There seem to be many better points, such as a to d.

Charles Matthews