Tri-Peaks

Goal

Clear the three peaks: move all 28 cards of the tableau onto the waste pile.

How it works

• A card of the tableau is playable when no card covers it.
• It can be placed on the waste pile if its rank is adjacent to that of the top card, regardless of suit: an 8 on a 7 or on a 9.
• At the Easy to Hard levels, the Ace and the King follow each other (wrap-around); at the Expert and Diabolical levels, they do not.
• At the Easy level, all cards are visible; at the other levels, a card stays hidden until it is uncovered.
• When no card fits, tap the stock: its card becomes the new top of the waste pile. The stock is not replenished.

Streaks and scoring

• Each tableau card you play extends the current streak and earns 10 points more than the previous one: 10, 20, 30... Drawing from the stock resets the streak to zero.
• Peak cleared: 150 points for each of the first two, 300 points for the last one.
• Victory: 50 points for each card left in the stock.

Controls

• Tapping a playable card sends it to the waste pile; drag and drop works too.
• Keyboard: Space to draw, I for a hint, Ctrl+Z to undo.

About the solver

Each deal is chosen by an exact solver that plays the game with the cards face up, in a separate thread: depth-first search with a transposition table over the cards removed, the stock and the rank of the top card, moves ranked by the cards they uncover, and pruning of cards left with no neighbour. Difficulty is measured by the number of dead ends explored before the solution. The hint queries the same solver, so it knows the hidden cards and the order of the stock.