Practice studio
Choose a strategy and get a fresh position where that technique is the next logical step. Mark the answer directly on the grid, then check your deduction.
A focused learning loop
Pick a family and the exact solving technique you want to strengthen.
Study a prepared position with complete candidates and find the logical deduction.
Mark your answer, reveal the pattern if needed, and move straight to a fresh example.
Learning a strategy from a diagram is only the first step. Recognizing it independently on a crowded grid is the skill that solves real puzzles. The Sudoked technique trainer takes you directly to a prepared candidate state where your chosen method produces the next logical deduction, so practice time is spent studying the pattern rather than completing unrelated earlier moves.
You are not asked to copy a highlighted example or guess a finished digit. For placement techniques, you must identify the candidate forced into a cell. For elimination techniques, you must mark the complete set of candidates that the logic removes. The answer is checked as an exact set, helping you learn both the structure of a technique and the full consequence of applying it.
Training positions are built from newly randomized Sudoku puzzles and prepared by the same technique-aware logic system used by Sudoked. Before a position enters the trainer library, it is checked to ensure that the requested technique has exactly one distinct application at that point. Invalid, ambiguous and duplicate states are rejected. This creates focused exercises with a clear target while preserving the context of a genuine Sudoku board.
When an exercise is loaded, the trainer randomly changes digits, rows, columns, bands, stacks and orientation using transformations that preserve Sudoku logic. The prepared grid, candidates, pattern and answer all move together. This produces visually varied practice without changing why the deduction works, reducing reliance on memorized cell locations or familiar number combinations.
Choose a technique family, inspect the full candidate grid, mark your deduction and check it immediately. If you need help, reveal the solution to see the supporting pattern and correct action directly on the board. Session totals and streaks encourage repeated recall, while the linked technique guide lets you move from practice back to a detailed explanation whenever the reasoning is unclear.
The interface adapts to the way you play: desktop users select candidates directly in the grid, while touchscreen users select a cell and use a large candidate keypad. The library is organized from singles, intersections and subsets through fish, wings, uniqueness patterns, BUG structures, cycles and forcing chains. Together, the trainer and the Sudoku technique guides provide a focused path from understanding a method to recognizing it confidently in a real puzzle—free and without advertising interruptions.