Analytical problem solving with algebra & reasoning. Easy to expert for all ages Fun and educational. Enhances math sense on algebra & reasoning (logic). Goal is to locate hidden stars on a board by using clues. For hard/expert levels and larger boards, search Tentaizu in Android Market. Similar to minesweeper, sudoku & kakuro. Search Wikipedia for "Board puzzles with algebra of binary variables". Unlike to minesweeper, the solution is unique, and no any case leading to random guess.