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G-Knights Exchange*

Chess Puzzles

by Serhiy Grabarchuk

Featured at Puzzles.COM
This puzzle is featured at Puzzles.COM.
Eight chess knights, four white and four black, are placed on the special G-chessboard as shown in the Start diagram above left. Now, performing just normal knight’s moves from cell to cell of the chessboard, exchange the white and black knights as shown in the Goal diagram above right. Knights can leap to vacant cells only. Counting a consecutive series of leaps of a knight as one move, can you exchange the knights in exactly eleven moves?

To move a knight simply click it first; then click a chosen free cell which the knight should move to. Use "Undo" and "Redo" for the respective backward and forward moves of knights on the board in accordance with your solution. Once you solve the puzzle, or have some particular sequence of moves, you can use "Undo" and "Redo" to check all your moves. The Labels button can be helpful to check and note down your solution.
Knight Swap
In Wei-Hwa Huang's Puzzle Challenge Number 8 by Google (posted on July 14, 2006), he posed six different challenges on letter-shaped chessboards which form a stylized Google logo; see below. Some of these challenges were based on my G-Knights Exchange puzzle proposed above.

The six chess puzzles of Wei-Hwa's Puzzle Challenge Number 8 by Google.
-- source: Wei-Hwa's Feedback: Knight Swap.
*) This puzzle was published in the Puzzle Miniatures book, vol. 2, by Serhiy Grabarchuk in 2003.
Several new chess puzzles can be found in my book,
The New Puzzle Classics: Ingenious Twists on Timeless Favorites, published by Sterling Publishing Co., Inc. in 2005:
     -- Chapter 7: Tricky Moves, pages 204-209.
Also, a nice collection of chess puzzles is presented at
Puzzles.COM in its Puzzle Playground section.
Last Updated: October 14, 2008
Posted: October 14, 2006
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