Clean, distraction-free, and backed by an AI coach that teaches technique — not just answers.
Five quick lessons. From the very basics to advanced techniques like naked pairs. Takes about 5 minutes. No experience needed.
Stuck? Ask the coach anything — it explains the technique, not just the answer.
Jot candidates in any cell. Pencil marks auto-clear as nearby cells are solved.
Experiment freely. Every move is reversible — step back to any point without restarting.
Everything you need to improve, none of the noise.
Built by Valeriya Mukhizinova · nFactorial 2026