Troika places the four aces on their foundations and spreads the other 48 cards across eighteen visible piles. Matching ranks can share a pile, but only three cards fit.
A match moves a blocker; it does not remove it
Move one exposed card onto another of the same rank if the receiving pile contains fewer than three cards. Empty piles cannot be reused. There is no stock, and cards do not disappear when matched. Win by building all four foundations upward by suit through king.
Check the suit beneath the match
Moving one seven onto another may release an urgently needed foundation card. It also puts that moved seven on top, where its suit may matter later. Inspect both piles before choosing: a full three-card stack offers no further parking space.