Shaped Tabs Puzzle

This puzzle has four differently shaped tabs, each kind fitting into between 1 and 4 different kinds of holes.  Usually you have to match the shape of the tab to the shape of the hole, but not always.  The circle tab will fit in the square hole, but the square tab will not fit into the circle hole, for example.  Several challenges are engraved on the back having to do with where the holes are left over (places where the tab doesn’t match the shape of the hole, leaving some extra space).  For example, try to get the holes only at the edge of the puzzle.  This is one of the most fun and rewarding puzzles on the website with lots of possibilities!

• Red alder and black walnut wood
• 12 pieces
• 1,190,887 solutions to fit the pieces in the tray, but as few as 5 solutions for the toughest challenge
• 5″ x 4″ (13cm x 11cm)
• difficulty level:  various challenges from 2 out of 10 up to 8 out of 10