Combination 1-3-13-14 of Berend Jan van der Zwaag

1

 Does it contain two non-4-touching dominoes? (Touching at the corners is allowed.)

3

 Does it fit together with two copies of another pentomino in a 3x5 rectangle?

13

 Does it fit together with a tromino and a domino in a 2x5 rectangle?

14

 Can two copies construct a 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

3

 N Y Y N N Y N Y N Y Y Y

13

 N Y Y Y Y N N N N N Y N

14

 Y N Y Y N Y Y N N N Y Y


 Solution 1

Solution 3

Solution 13

 		 Solution 14