# Sudoku Personal Trainer

Sudoku Personal Trainer is an offline-first iPhone and iPad application for
learning how to recognize and apply human Sudoku-solving techniques.

## The three training modes

- **Learn** — narrated, animated technique lessons with every explanation kept
  visible on screen.
- **Practice** — focused examples with explanatory feedback, notes, reset, and
  help whenever you want it.
- **Free Play** — complete Easy, Medium, Hard, and Expert puzzles with notes and
  optional teaching hints.

## The teaching approach

The trainer represents each technique as an explainable, deterministic solve
step. The first working lesson teaches the naked single: a square where every
candidate but one has been ruled out by its row, column, and box.

An incorrect answer is an opportunity for explanation, never an elimination
condition. Learn, Practice, and Free Play have no scores, lives, mistake caps,
timers, rooms, accounts, or leaderboards.

## Current status

Sudoku Personal Trainer is in active development. Its first offline teaching
loop and penalty-free Free Play modes are working now, with more techniques and
bundled narration planned for future phases.