SYStars

A rotating star changes the board in Systars. You select a free star vertex, and white and black chips interact with matching-colour vertices before chips on the board flip. The description presents this as a logic puzzle, with planning around those changes rather than simply placing one permanent piece.

Systars asks you to click a star vertex that is free of chips to make a move. No keyboard controls are supplied; use the on-screen explanation to confirm how the resulting chips flip before you commit to a longer plan.

Friends can play, and the source mentions dotted or numbered chips, scoring contests and surviving a given number of moves. It does not explain all of those variants in full. The instruction text itself cuts off during the colour-flipping explanation, so the exact result of every move should be learned from the game guide.

Look at the affected vertices as a group rather than following only the chip you want to change. Trying one move and checking its result can help you understand the flipping pattern, especially before selecting a variant with a fixed move allowance. A different board-based logic challenge for friends is Riddle Cubes.