What is Triangle Solitaire?
Triangle Solitaire is a Pyramid variant with two key differences: pairs total 12 instead of 13, and the layout is an inverted triangle rather than a standard upright pyramid. In a standard Pyramid, the apex is one card at the top with the base row of seven at the bottom. Triangle inverts this — the widest row is at the top and the layout narrows to one or two cards at the bottom. This changes which cards are initially exposed and which are blocked.
The pairing-to-12 rule
Where Pyramid pairs to 13 (Ace=1, 2=2 … Queen=12, King=13 alone), Triangle pairs to 12. The arithmetic shifts the entire complement table: Queen (12) is removed alone; Jack (11) pairs with Ace (1); Ten (10) pairs with Two (2); Nine (9) pairs with Three (3); and so on. There are no solo-removal Kings — Kings (13) have no complement under 12 and must be paired with another card.
Wait — in most Triangle implementations, Kings are simply unremovable or handled by a different rule. The exact treatment of Kings in Triangle varies by implementation; check the in-game rules for the specific version you are playing.
Read the Triangle strategy guide →
How the inverted layout changes access
In standard Pyramid, the apex card is the hardest to reach because it is blocked by every other card. In Triangle, the narrowest part (bottom) is the hardest to reach, but the top row is immediately and fully exposed. This means the opening is information-rich: many cards are available immediately, but they all share blocking relationships with the narrowing rows below.
The strategic implication: the first removals are easy — many exposed cards are available. But mid-game, the narrowing layout concentrates available cards into fewer and fewer positions, making each removal more consequential.