Definitive Illegal Formation Rules

[pnr8555]

So this one (3W-4-2(AML/R)-1) is illegal, right?

3 players on flanks, that definitely illegal formation!

Is red cards illegalise the formation?

[Razz]

3 players on flanks, that definitely illegal formation!

Is red cards illegalise the formation?

Yes, a red card can make your formation illegal and you'd get 20% possession from that point on.
e.g if you had 3 defenders, and 50% possession in the first half, and a defender was red carded in the 45th minute, you'd end up with 35% possession overall (50% first half, 20% second)