There are nine groups left to play, and Scotland need four teams to be worse than them.
It means they need a minimum of four of the following scenarios to play out:
THURDSAY
Group E: Both Ecuador (v Germany) and Curacao (v Ivory Coast) to fail to win.
Or Curacao to get a victory by at least four goals and Ecuador fail to win.
Group F: Sweden to lose to Japan by four or more goals.
Group D: Paraguay and Australia are on three points and play each other, a draw would send both through.
Scotland need Paraguay to lose by two or more goals, or Australia to be beaten by at least four goals.
FRIDAY
Group F: Senegal and Iraq to draw.
Or Iraq to beat Senegal by no more than two goals.
Group H: Uruguay to lose to Spain.
Group G: Iran to lose to Egypt.
SATURDAY
Group L: Croatia to lose to Ghana by at least three goals.
Group K: DR Congo v Uzbekistan to be a draw.
Or Uzbekistan to win by no more than three goals.
Group J: This is a carbon copy of Group D, with Austria and Algeria on three points and a draw would send both through.
Scotland need Algeria to lose by two or more goals, or Austria to be beaten by at least four goals.