1
2
9
15
Combination
1-2-9-15 of Berend Jan van der Zwaag
|
1
|
Does it contain two non-4-touching dominoes? (Touching at the corners is allowed.) |
|
2
|
Does it fit together with a heptomino in a 3x4 rectangle? |
|
9
|
Is its bounding rectangle a square? |
|
15
|
Can two copies construct a point-symmetric decamino with a fully enclosed 1x1 hole? |
| F | I | L | N | P | T | U | V | W | X | Y | Z | |
|
1
|
N | Y | Y | Y | N | N | Y | Y | Y | N | N | Y |
|
2
|
N | N | Y | N | Y | Y | Y | Y | N | N | Y | N |
|
9
|
Y | N | N | N | N | Y | N | Y | Y | Y | N | Y |
|
15 |
Y | N | Y | Y | N | Y | N | N | N | N | Y | Y |
|
Solution 1 |
Solution 2 |
Solution 9  | Solution 15 |
