SolCalSK

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This solitaire "Calculation" is very mysterious compared to the other solitaire games. Because all the combinations are solvable.

The first time I met "Calculation" was over 30 years ago. Since then I have been playing and making this game as an app on various computers.
About 7 years ago, I suddenly realized that I could solve all the combinations no matter how difficult it seemed. For easy ones, it takes only a few minutes. For hard ones, it may take hours, but in the end it can be solved. You just need to memorize it and think really hard. Sometimes make strategy. Just like chess.