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Alphametics

Alphametics or verbal arithmetic or Kryptogramm is a mathematical game.

This Scala code solves arbitrary alphametics games.

Usage

The API is in German.

  • Zahl = Number
  • plus, minus
  • aufgabe = task/puzzle
  • loesung = solution

The idea is to transform the puzzle's equation to the form of row1 + row2 + ... - resultrow = 0 and then solve that equation. You create the equation via val aufgabe = Zahl(row1).plus(Zahl(row2).plus(???).minus(Zahl(resultrow)) and then solve it with aufgabe.loesung.

Example:

import alphametics.Alphametics.{Aufgabe, Ziffer, Zahl}
val aufgabe: Aufgabe = Zahl("VATER")
  .plus(Zahl("MUTTER"))
  .minus(Zahl("ELTERN"))
val loesung: Option[Map[Ziffer, Int]] = aufgabe.loesung
assert(loesung.contains(Map('A' -> 9, 'E' -> 2, 'L' -> 3, 'M' -> 1, 'N' -> 0, 'R' -> 5, 'T' -> 6, 'U' -> 8, 'V' -> 4)))

Have fun!

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