YINSH is the 5th installment in the GIPF series of two-player abstract games.

The players each begin with five rings on the board. Each time a ring is moved, it leaves a marker behind. Markers are black on one side and white on the other. When markers are jumped over by a ring they have to be flipped, so their color is constantly changing. Players must try to form a row of five markers with their own color face up. If a player succeeds in doing so, they remove one of their rings as an indication that they have formed such a row. The first player to remove three of their rings wins the game. In other words, each row you make takes you closer to victory-but also makes you weaker, because you have one fewer ring to play with. Very tricky!