Tentaizu is a puzzle which requires both analytical problem solving and combinatorial reasoning skills together.
It is educational for kids to enhance their math sense, and it is minutes-length challenge for the adults.
Tentaizu requires the use of the solution of multiple equations with conditions, and iterative reasoning. The goal is to locate hidden stars on a board by using clues including equation with binary variables, uniqueness, and partitioning.
Four difficulty levels and four board sizes. If you like sudoku, kakuro and minsweeper, you may like tentaizu as well. Tentaizu is similar to minesweeper, however the solution is unique and no any case leading to random guess. Search Wikipedia for "Board puzzles with algebra of binary variables".