The game is called so because all building is done in alternating colors of red and black.
It is a part of the Napoleon at St Helena family of patiences and solitaires.
[2] The rules presented here are those provided in Lee and Packard's book – 100 Best Solitaire Games (2015).
Ultimately, the game is won when all cards are built onto the waste pile.
When popularly implemented in modern software suites, this game has the following common variations: