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4

Pyramid of 20 Balls

Pyramid of 20 Balls Design and Copyright : Andrey Ustjuzhanin (2014).

A 
. .| . |A .
 . |A A| .
. .| A |. .
 A |. A| .
B 
B . | B .
 . B|. B
. . | . B
C 
 . |C .
C C| C
 C |. .
D 
D .| .
 D |. D
. D| .
Pieces 4
Selection random
Solutions 1
Oct 30, 2014 by k16@chiba.email.ne.jp