How does Thermo Sudoku work? Each sudoku grid contains thermometer shapes (often drawn to create themes) and digits on thermometers must increase as one moves further from the bulb end.
The developers introduce a new constraint that sets this variant apart from the traditional Sudoku formula. Each puzzle grid contains "thermometer" shapes, and the digits within each thermometer must increase from the bulb end to the tip. This additional logical requirement forces players to think in new ways, completely refreshing the standard Sudoku solving experience.
Puzzle enthusiasts consistently praise the high quality and interesting logic of the puzzles. Unlike randomly generated Sudoku grids, these puzzles bear the distinct hallmark of human design. Reviewers note that the puzzles feel thoughtfully constructed, with a smooth difficulty curve that allows players to gradually improve their skills. Many puzzles even incorporate thematic thermometer shapes to create a more visually engaging experience.
The game's interface receives widespread acclaim for its clean, simple, and user-friendly design. Players appreciate features like the ability to make pencil marks, toggle between various settings, and access smart hints. The hint system, in particular, stands out as an invaluable learning tool, as it guides players through the logic rather than simply providing the solution.
Reviewers frequently highlight the game's potential for improving one's Sudoku skills. The puzzles are crafted with the intent of teaching players new techniques and strategies, such as identifying hidden pairs, X-wings, and Y-wings. As players progress through the increasingly challenging puzzles, many report a growing sense of accomplishment and sharpened logical reasoning abilities.
While the game launches with 40 puzzles, the developers have committed to expanding the collection to 100 puzzles within the first year. Reviewers appreciate this roadmap for ongoing content, as it provides plenty of value and replayability. The unique thermometer constraint ensures that each puzzle feels distinct and fresh, further contributing to the game's longevity.