Neo Black And White

Designed and made by Minoru Abe 1985,
(cardboard box, wood tray, and 12 painted wood pieces, 5.25 by 6.25 by 3/4 inches;
directions are in Japanese)
The two blank 1x1 pieces are glued to the tray and cannot move. The center blank 2 by 1 keeper piece is removed to make the starting position shown on the right above. The goal is to slide the pieces so that BLACK is on top and WHITE is on the bottom.

Hordern's book gives a solution of 198 rectilinear (237 straight-line) moves and the Puzzler's Tribute book, in a chapter coauthored by Minoru Abe, shows 190 rectilinear (231 straight-line) moves. This classic puzzle is one of the originals made by Minoru Abe (they were also later produced in larger quantity in Japan) and is a very attractive and well made. I made the one below for guests to use.


Made by J. A. Storer 2007.
(cardboard sleeve, bloodwood tray and fixed 1x1's, birdseye maple WHITE,
rosewood BLACK, unknown hardwood L's, plexiglass keeper, 5 by 6 by 3/4 inches)

Hordern's Neo Black And White Solution
Here are the start position, end position, and the positions of Hordern's solution for which an L-shaped piece is to be moved next:


Hordern's Neo Black And White Solution, Continued
We use a more verbose notation than Hordern's book. The first letter is the piece to be moved (X denotes the left L-shaped piece and Y the right one) and the second letter is the direction; all moves are a distance of 1 unit unless followed by a 2 (to specify two units). Two consecutive moves of the same piece are listed together as a single rectilinear move.


(198 rectilinear moves, 237 straight-line moves)

Puzzler's Tribute Neo Black And White Solution
Here are the start position, end position, and the positions of Puzzler's Tribute solution for which an L-shaped piece is to be moved next:


Puzzler's Tribute Neo Black And White Solution, Continued
We use the same notation as we did for the Hordern solution (like Hordern's book, the Puzzler's Tribute book uses a more compact notation than is used here). The first letter is the piece to be moved (X denotes the left L-shaped piece and Y the right one) and the second letter is the direction; all moves are a distance of 1 unit unless followed by a 2 (to specify two units). Two consecutive moves of the same piece are listed together as a single rectilinear move.


(190 rectilinear moves, 231 straight-line moves)