# Diagonal Board **Domain:** Cryptography / Constraint Propagation **Doc Type:** Component **Maturity:** Developed **Related:** [[Bombe]], [[Gordon Welchman]], [[Constraint Satisfaction]], [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] ## Definition The diagonal board was Gordon Welchman's enhancement to the Bombe, connecting letter relationships so logical consequences and contradictions could propagate across hypotheses. ## Bauhaus Architects Context It is a historical example of constraint propagation implemented in electromechanical hardware. ## Backlinks - [[wiki/Bauhaus Architects of AI|Bauhaus Architects of AI]] - [[articles/Bauhaus Architects of AI|Bauhaus Architects of AI]]