Stage four

Bombe Training

A guessed word is not enough. You must turn it into a menu, wire that menu into a machine, and let the machine test millions of rotor positions for you.

Lesson 1 10 min
From Crib to Menu
A guessed word becomes a network of letter pairings.
Lesson 2 12 min
The Bombe Machine
An electrical analogue of the menu.
Lesson 3 11 min
Running a Bombe Job
Set the machine, read the stops, find the day key.

From Crib to Menu

The Bombe Machine

Running a Bombe Job