Card Game - Dominoes

[10ClarionSt]

This is a very simple game. I'm sure lots of you have played it. Just to re-cap: the player with the 7 of diamonds starts the game then other players follow the suit up or down, ie, 6 or 8. the other suits start with the 7 of those suits and players then follow as above. The player who puts their last card down first, is the winner, but here's the question. There are 4 players. Half way through the game, player A can't go. Neither can player B. At this point, there are 8 options on the 4 columns. As A and B can't go, this means that players C and D are holding all the 8 options between them. Am i correct in saying that because player C says he only has 3 of them, and player D only has one. This caused a big argument. Where are the other 4 cards? Am I right about the 8 options after A and B can't go? I hope it's not too confusing cos it's a really simple game.

[knowabit]

I know that game as 'sevens,
Are there cards missing from the pack?

[Jackdaw33]

If all 13 of two suits have been played there are only 4 options left.