21 x 21

   
[Diagram]

21x21 diagram

This is what a 21x21 board looks like, if we leave the star points on the fourth line and in the center, being 4-4, 4-11 and 11-11.


This is a copy of the living page "21 x 21" at Sensei's Library.
(OC) 2023 the Authors, published under the OpenContent License V1.0.
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