In relation to the marked white stone, is an angle play. After the contact play, the angle play is the most direct way to play against a stone of the opponent's.
Normally White plays or a in reply. This is likely to lead into a fight with two characteristics:
- White will become stronger;
- Black will find it hard to play tenuki.
For example Black at b will often cause a pushing battle. White has the initial choice of direction of play. The fights arising after contact and angle plays are often classified together as 'contact fights'. They are the most violent developments from a single stone, and very urgent.