Some of the oldest poly form wooden puzzles first formed as
chessboards. Similar to the Soild Pentominos the Pentominos
Chess brainteaser contains 13 pieces; 12 pieces consisting of
five squares joined edge to edge forming different shapes and 1
square piece containing 4 joined squares. You may find the
shapes of the alphabet letters:I,L,P,T,U,V,W,Y,Z. the F looks
like it had an accident and N takes some imagination. The Solid
Pentominoes offer great challenges to the puzzler, For example:
Try build a rectangle size 6x10 - This rectangle has 2339
different solutions. A 3x20 rectangle has only 2 solutions. A
4x15 rectangle has 368 solutions. A 5x12 rectangle has 1010
solutions. A 5x4x3 cube has 3940 solutions. A 6x5x2 cube has 264
solutions. A 10x3x2 cube has 12 solutions. This brain teaser
puzzle comes complete with a box and a lid so that the pieces
can be stored away for safe keeping. If you think building
blocks is kid's stuff, try to build this square (as well as many
other shapes). The Pentominoes pieces