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本帖最后由 grigr 于 2026-6-28 20:24 编辑
I just came across this topic. This puzzle is very popular in Russia. I’ve also conducted extensive research into the various configurations. You can explore them on the Russian forum: http://twistypuzzles.ru/forum/index.php/topic,1261.0.html
Unfortunately, the author's blog and program aren't accessible right now, but the configurations published here are very interesting. I need to study some of them.
I made this puzzle and am selling it with an extra set of pieces and a block to change the board configuration.
I found one of the most difficult configurations. You need to swap the red and green parts. You will need 484 moves.
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