IBAN validation with BBAN format check

This post describes free and ready to use Excel/VBA functions for IBAN validation, based on Mod 97 calculation and a format check of the country-specific Basic Bank Account Number (BBAN).

Mastermind in Excel

In this post an Excel worksheet implementation of the well known Mastermind game. I developed the Mastermind part of this workbook several years ago. For this showcase app I added a scoreboard, and turned it into a so called dictator application.