Kengen NPM | npm.io

KenKen

This is a library for generating and rendering KenKen puzzles. Puzzle generation is seedable and highly customizable. Rendering can also be customized.

KenKen are mathematical puzzles similar to Sudoku. They must include exactly one of each number in each column and row while also solving the simple math problems arranged throughout the board.

This library generates KenKen puzzles of any size and is capable of rendering them as images via an HTMLCanvasElement.

Usage

Generate a 4x4 KenKen puzzle.

import { KenKenGenerator } from 'kengen'

const puz = KenKenGenerator.generate({ size: 4 })

Generate a 6x6 KenKen puzzle with a specific seed and more math operations

import { KenKenGenerator, MathOperators } from 'kengen'

const puz = KenKenGenerator.generate({ 
  size: 6, 
  seed: 1069, 
  operations: [
    MathOperators.ADDITION, 
    MathOperators.SUBTRACTION, 
    MathOperators.MULTIPLICATION, 
    MathOperators.DIVISION] 
})

Render a 7x7 to a PNG

Uses the node-canvas library.

import { KenKenGenerator, Renderer } from 'kengen'
import { createCanvas } from 'canvas'
import * as fs from 'fs'

const puz = KenKenGenerator.generate({ size: 7 })
const canvas = createCanvas(100, 100)
Renderer.renderCanvas(puz, canvas.getContext('2d'), { withSolution: true })
const canvasBuffer = canvas.toBuffer()
fs.writeFileSync('kenken-7x7.png', canvasBuffer)