Origami Checkerboard


#19

Legend
Valley folding
Mountain folding
0.
 □□□□□□□□□ 
 □□□□□□□□□
 □□□□□□□□□
 □□□□□□□□□
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 □□□□□□□□□
 □□□□□□□□□
     \    ↓
1.
     \    ←
 □□□□□□□□□
 □□□□□□□□□
 □□□□□□□□
 □□□□□□□
 □□□□□□
 □□□□□
 □□□□
 □□□
 □□
2.
←  
 □■■■■
 □□□□□
 □□□□□
 □□□□□
 □□□□□
 □□□□□
 □□□□
 □□□
 □□
3.
   ■■■
   □□□
   □□□
   □□□ 
   □□□
   □□□
   □□
   □■
   □■
  ↑
4.
  ↓
   □□
   □□■ 
   □□□
   □□□
   □□□
5.
   ■□■
   □■□
   □□□
invented by YAMAMOTO Taiga on Aug 29, 2017

Nov 23, 2004 by k16@chiba.email.ne.jp