Crescent Solitaire

Most solitaire variants only let you build in one direction. Crescent Solitaire runs two: cards climb in sequence above the aces and descend above the kings, matching suits both ways, drawn from a curved row of reserve piles set above your eight tableau stacks. It takes a hand or two to read the layout, since the crescent shape isn't the usual grid everyone's used to. Once it clicks, it plays like a stricter, more deliberate cousin of Klondike.