I've never met anyone with anything so similar before! If I'm playing solitaire, the cards at the top right (where you pile each suit) have to be 2 of one colour, then 2 of the other, or 1 colour, other colour, 1 colour other colour. In other words:
RRBB
BBRR
RBRB
BRBR
[R and B standing for 'red' and 'black', of course]
Never had that egg version... But probably will now.:roll:
[EDIT]
Realised I could just change the colour manually :)