價格：免費
檔案大小：18.8 MB
版本需求：需要 iOS 9.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Challenging Classic Chess Puzzle.
Can you put Eight Queens on an 8 x 8 chess board without any of them attacking one another?
The solution requires that no two queens share the same row, column, or diagonal.
There are actually 12 fundamental solutions to this classical problem. (Minus rotations and reflections)
Can you find ALL 12?
支援平台：iPhone, iPad