Sudoku: Zen Master

Sudoku: Zen Master is a classic logic puzzle with a convenient interface, visual hints and a unique Training Mode.
The game helps not only to solve puzzles, but also to learn how to do it better: related numbers are highlighted, candidates are automatically placed, impossible options are removed, multi-cell selection and fast value entry are supported.
A fair difficulty scale is used for hard levels, and at maximum settings you will encounter truly advanced techniques such as chains, wings and other logical patterns.
Day and night themes, portrait and landscape orientation, playing without mistakes or up to 3 mistakes are available. Almost all parameters can be customized to your liking.
All puzzles are generated and solved locally, which means the game runs fast and allows you to play infinitely.

RULES:
Fill the 9×9 grid so that in each row, column and 3×3 block the digits from 1 to 9 do not repeat.

CONTROLS:
• Normal mode — select a number and place a value or candidate
• Fast mode — select a number and place it in cells with one click
• Double tap: automatically fills all candidates or places the only possible digit
• Multi-select — select multiple cells at once for batch actions

TRAINING MODE:
• Level 1: digit availability indicators (yellow = few, green = many)
• Level 2: names of techniques available at this step
• Level 3: visual hints of "hot" cells (green frames on key cells)

HINT:
• Press the button and you will see a detailed analysis of techniques available at this step, with visual highlighting and explanation
• You can immediately apply the found technique

The game is suitable for both beginners and experienced players who value high difficulty and skill development.