1. 2D puzzles

1-1. 2D puzzles with 6 pieces

7.0.2	7.0.3	7.0.4	7.0.5	7.0.6	7.0.7
7.2.1	7.2.2	7.2.4	7.2.5	7.2.6
7.7.0	7.7.8	7.7.9

1-2. 2D puzzles with 9 pieces

7.2.7

1-3. 2D puzzles with 12 pieces

7.8.1

7.8.7