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Note: The miniclip version of the game is not working, so I have put a similar game that you can play.

TriPeaks Solitaire by MiniClip

TripPeaks is about picking a number from the table and then start selecting a number that should be either +1 or -1. For example, if you peak 9, then you need to select either 10 or 8 to remove the card from the table.