Block Ten

Designed by Minoru Abe circa 1985, this puzzle made by J. A. Storer 2007.
(cardboard sleeve, wood tray, plexiglass keeper, and 9 wood pieces, 6" x 7" x 3/4",
tray cherry, 2x2 walnut, L's purple heart, 1x2's bloodwood, 1x1's rosewood,
sleeve shows 45 problems - 12 on top and the remaining 33 on the bottom)

Starting from various positions on the 6 by 4 unit tray, the goal is to move the 2x2 piece to the top. The two 1x1 pieces painted black are glued to the tray and cannot move. The following page show a variety of starting positions; of these positions 17, 20, 32, 35, 40, and 45 are symmetric ones; here they are in increasing order of the number of rectilinear moves required, along with six examples of non-symmetric positions:

Block 10 Problems
Problems 1 through 20 are on the Minoru Abe directions, 21 to 29 are problems D28, D29, D30, D32, D33, D34, D38, D39, D41 from pages 113-116 of the Hordern book (problems D24, D25, D26, D27, D31, D35, D36, D37, D40, D42, D43 correspond to problems 1, 6, 3, 12, 5, 11, 4, 13, 10, 15, 19), 30, 31, 32 are the three Henderson problems shown on the Fujiwara page, and 33 to 45 are Fujiwara's problems 1, 3-10, 12-15 (the Abe problems A-D shown on that page correspond to problems 13, 14, 12, 11, and Fujiwara problems 2, 11 correspond to 20, 17).

Block Ten Made In Japan

Designed by Minoru Abe 1979, purchased in Japan 2010.
(wood pieces ina cardboard box, 6" x 4.4" x 7/8")

Solution To Abe Problems 1 & 2
Here is a 26 rectilinear moves (35 straight-line moves) solution to the first of the problems in the Abe directions:

Here is a 28 rectilinear moves (39 straight-line moves) solution to the second of the problems in the Abe directions:

Solution To Abe Problem 25
Here is an 87 rectilinear moves (117 straight-line moves) to the last of the problems in the Abe directions (it can also be done in 115 straight-line moves that are equivalent to 89 rectilinear moves):

Further Reading

Fujiwara's Pages, from: