sudoku-trainer's Introduction

A Sudoku trainer / solver / generator.

This repository contains a full-blown sudoku trainer / solver / generator which allows training of various techniques to solve sudoku puzzles.

Features

different types of sudoku puzzles (classic 9x9, 6x6, 4x4, jigsaw)
various logical solving techniques
- singles (full house, naked & hidden singles)
- locked pairs / triples
- intersections (pointing / claiming)
- hidden pairs / triples / quadruples
- naked pairs / triples / quadruples
- basic fish (x-wing, swordfish, jellyfish)
- single digit patterns (skyscraper, 2 string kite)
- uniqueness tests (unique rectangle 1/2/4)
- wings (xy-wing, xyz-wing, w-wing)
- chains (remote pair, x-chain, xy-chain)
all possible solution steps
brute force solver
rating mechanism
puzzle generator
visual explanation of each solution step
much more ...

Getting Started

The app requires a working Java 11 installation on your computer.

To run the app, simply type:

./gradlew run

Screenshots

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sudoku-trainer's Issues

Add sudoku generator

Add a sudoku generator for different difficulty levels.
A very naive implementation is already there, but its slow and there is no guarantee that a valid sudoku is found in a reasonable amount of time.

Support undo / redo actions

Add support for undo / redo actions.

Make manual pencil marks more sane

Currently, manual pencil marks works inverted, by default all values are possible and displayed. For convenience reasons it should work the other way around: no pencil marks are visible at first, and the user can select which ones shall be displayed.

The reason for this odd behavior is because manual pencil marks are simulated using the excludedValues property of each cell. This should be completely separated, the UI should take care of manual pencil marks as the stored values in the model are only needed for the hint solvers.

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