Y by Adventure10
On a
square board or placed figures of shape 1 (of 5 squares) (in all four possible positions) and shaped figures of shape 2 (of 4 squares) . The figures do not overlap, they do not pass through the edges of the board and the squares of which they are drawn lie exactly through the squares of the board.
a) Prove that the board can be fully covered using
figures of both shapes.
b) Prove that if there are already
shaped figures on the board of shape 1, then at least one more figure can be placed on the board.
c) Prove that if there are already
figures of both shapes on the board then at least one more figure of both shapes can be placed on the board.


a) Prove that the board can be fully covered using

b) Prove that if there are already

c) Prove that if there are already


This post has been edited 1 time. Last edited by parmenides51, Feb 14, 2020, 7:34 PM