Klondike Solitaire

Opening

This is Klondike solitaire done thoroughly rather than minimally: the standard seven-column deal, stock and waste, four foundations — plus undo, redo, a built-in solver/hint system, and options most free clones don't bother with (draw-1 or draw-3, Vegas-style pass limits). It's part of Frank Force's LittleJS Arcade collection and it's one of the more feature-complete entries in that set.

Controls, verified with a real computed move

Drag-and-drop card games are exactly the kind of interaction that can look fine in a screenshot while quietly failing under a real finger, so this was tested with actual rigor rather than trust. The live card-stack state was read directly out of the running game, and a genuinely legal move was computed against it — checking the game's own suit-and-colour rule (suit % 2 === 0 is red) to find a tableau card that could legally land on another, one rank lower and the opposite colour. That move's two card positions were converted into exact screen coordinates using the game's own worldToScreen function, and a real touch drag was dispatched along that path on a simulated phone. Reading the stack sizes afterward confirmed the exact card moved from the exact source pile to the exact destination pile the computed move specified — not an approximation, an exact match. The identical process with a genuine mouse drag on desktop, testing a different pair of cards, produced the same precise result. A simple tap on the stock pile to draw a card into the waste was also confirmed the same way.

Presentation and depth

Cards are clean and legible, dealing and flipping animate smoothly without feeling slow, and a subtle highlight tint shows legal drop targets while dragging — a small touch that helps players new to the specific implementation. The toolbar's undo, redo, and solver icons are genuinely useful additions that turn "oops" moments and stuck positions into learning opportunities rather than restarts.

Final Verdict

A complete, well-built Klondike with real quality-of-life features and drag-and-drop controls that were tested with genuine precision rather than assumed to work. It's exactly the kind of dependable, no-surprises implementation this format deserves. Recommended.