Daily Star Battle (Solitaire.org)

Solitaire.org is a long-running site of free browser games, mostly card games and mahjong, and Daily Star Battle is one of its logic puzzles. The rules are the one-star kind: every row, every column and every outlined island must hold exactly one star, and no two stars may sit next to each other, across or diagonally.

Each day the game offers a new level, and you choose the size you want: 6x6, 8x8 or 10x10. The bigger boards are harder and take longer, so a day can be three puzzles if you play every size. The date shows beside a timer, and clicking the date lets you pick other days' boards of the same size. A Print button makes a paper copy of today's puzzle.

You click a cell once to drop a grey dot, twice to place a star and a third time to clear it. The dots are only notes; you win by placing every star correctly. Buttons let you undo, pause, restart and switch to full screen, and the game stores your time and number of moves in your browser. It can also be installed as a web app, and both ways of playing are ad free.

It suits players who like LinkedIn's Queens and want the same idea with plain outlined islands instead of colours, at a size of their choosing.