These are the 6 pieces that are used for both this page and the 18-move solution page.
This puzzle is the product of the Think Fun people (formerly Binary Arts).
The 'note' at the bottom-most picture states which first 5 pieces
are removed in order from left to right (D,F,B,E,A)
'D' piece is removed at the 28th move -- 'F' piece is removed at the 49th move -- 'B' piece is removed at the 58th move -- 'E' piece is removed at the 66th move
'A' piece is removed at the 69th move
For a much shorter solution -- 18 moves -- go here