Sudoku Solver
AI Sudoku Solver & Scanner
Scan Sudoku puzzles from paper, screenshots, or photos, then solve with step-by-step logical hints and technique practice.
Camera scanner
Logical hints
Practice mode
Go Practice
Tsumego
Train life-and-death reading with thousands of Go problems across beginner, elementary, intermediate, and advanced levels.
Life and death
Problem levels
Daily study
Play Go
Go Game
Play 9x9, 13x13, and 19x19 Go with multiple difficulty levels, handicap support, and server-based Go engine strength.
9x9 to 19x19
AI opponent
Handicaps
Game Database
Go Game Records
Browse professional Go records, classic games, modern tournaments, AlphaGo matches, and opening patterns for study.
Pro records
Opening search
Daily updates
Joseki Study
Joseki Dictionary
Study corner patterns with a compact SGF reader built for joseki browsing and variation review.
SGF reader
Corner patterns
Variation study
