First time I solve solitare like this rather quickly. In about 12 minutes. But System refuse to accept solution. All nicely formed stack wait something. I try to undo several moves, change mode from auto to another and nothing happened. After frustrating 10 minutes I try to save, and reload, again nothing.
And then I save, close window, reload puzzle and then it work correctly, But I loose booster bonus and receive 10 minutes more on my first good result.
Anyway if You get into a similar situation, just save and reload puzzle.
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