Maruseru/ Splitting AThree Point Extension
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When the opponent has overextended stones, you should invade. It is usually more effective to attack than to make territory somewhere else and letting the opponent stabilize himself.
![[Diagram]](../../diagrams/5/8cafbd0c969947de4d4749b73bcfb2ad.png)
Initial setup
![[Diagram]](../../diagrams/26/6acd12957eff1edf78341dbd661b0892.png)
Diagram 1: 1-2
: White can invade the overextended black stones.
: A normal response.
![[Diagram]](../../diagrams/6/c6dfa057ef1a87723edd75ca6cfae681.png)
Variation 1 at move 1 in Diagram 1: 1
: If Black gets to play here, this is the best move.
![[Diagram]](../../diagrams/46/d1153317ea3afe486864a37d5f5608d5.png)
Variation 2 at move 2 in Diagram 1: 1
: A normal response.
![[Diagram]](../../diagrams/27/9c625cc21cce958052f4723c785fb246.png)
Variation 3 at move 2 in Diagram 1: 1-8
: This is not a good move.
: Black is separated.
: Black cannot connect.
![[Diagram]](../../diagrams/44/c3dae871424d7bfe4e6292e41e72b362.png)
Variation 4 at move 2 in Variation 3: 1-6
: This nozoki is not good.
: Black has this tesuji to connect his stones.
![[Diagram]](../../diagrams/18/b0eaa0048ccbc32f1ad4ab3330c31aab.png)
Variation 5 at move 3 in Variation 3: 1
: This is another idea.