Pentomino Pairs Tiling a Rectangle with One Corner Cell
Removed
A pentomino is a figure made of five squares joined
edge to edge.
There are 12 such figures, not distinguishing reflections and rotations.
They were first enumerated and studied by Solomon Golomb.
The problem of arranging copies of a polyomino to form a rectangle
has been studied for a long time.
Here I study the problem of arranging copies of two pentominoes
to form a rectangle with one corner cell removed.
See also
I use Solomon W. Golomb's original names for the pentominoes:
This table shows the smallest total number of copies
of two pentominoes known to be
able to tile a rectangle with three of its corner cells removed,
using at least one of each pentomino.
 F  I  L  N  P  T  U  V  W  X  Y  Z 
F
 *
 18
 7
 ×
 7
 ×
 4
 16
 ×
 ×
 7
 ×

I
 18
 *
 7
 7
 3
 24
 46
 7
 35
 ×
 7
 35

L
 7
 7
 *
 3
 3
 13
 3
 4
 3
 16
 7
 16

N
 ×
 7
 3
 *
 3
 16
 18
 11
 ×
 ×
 11
 ×

P
 7
 3
 3
 3
 *
 4
 3
 3
 7
 7
 3
 4

T
 ×
 24
 13
 16
 4
 *
 61
 ×
 24
 ×
 24
 ×

U
 4
 46
 3
 18
 3
 61
 *
 81
 ×
 ×
 4
 ×

V
 16
 7
 4
 11
 3
 ×
 81
 *
 43
 ×
 11
 13

W
 ×
 35
 3
 ×
 7
 24
 ×
 43
 *
 ×
 11
 ×

X
 ×
 ×
 16
 ×
 7
 ×
 ×
 ×
 ×
 *
 31
 ×

Y
 7
 7
 7
 11
 3
 24
 4
 11
 11
 31
 *
 7

Z
 ×
 35
 16
 ×
 4
 ×
 ×
 13
 ×
 ×
 7
 *

So far as I know, these solutions
have minimal area. They are not necessarily uniquely minimal.
3 Tiles
4 Tiles
7 Tiles
11 Tiles
13 Tiles
16 Tiles
18 Tiles
24 Tiles
31 Tiles
35 Tiles
43 Tiles
46 Tiles
61 Tiles
81 Tiles
Last revised 20230620.
Back to Polyomino and Polyking Tiling
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Col. George Sicherman
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