2x2 board

   

A 2x2 Go Board:

[Diagram]

2x2 board


[Diagram]

2x2 board

[Diagram]

[Diagram]

[Diagram]

White 4 captures two stones

prisoners: BC BC

[Diagram]

prisoners: BC BC

[Diagram]

White 6 captures 1 stone

prisoners: BC BC BC

[Diagram]

Black 7 captures 3 stones

prisoners: BC BC BC WC WC WC

There are some who would object to this move under superko rules.

[Diagram]

score: White wins by komi value

prisoners: BC BC BC WC WC WC


Tas: How about:

[Diagram]

prisoners: BC BC

[Diagram]

White 6 captures 1 stone

prisoners: BC BC BC

[Diagram]

Black 7 captures 3 stones

prisoners: BC BC BC WC WC WC

No superko problems now.

[Diagram]

back to start

prisoners: BC BC BC WC WC WC

This can go on four times before stopped by superko, but neither player gains. Can a player cleverly use superko to his advantage?

[Diagram]

game ends

Assuming the superko rule it's possible for black to end the game here. The position is seki.

Tas: But no advantage...

impu1se: Presumably black wins with area scoring.


[ext] John Tromp's analysis


This is a copy of the living page "2x2 board" at Sensei's Library.
(OC) 2007 the Authors, published under the OpenContent License V1.0.
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