Fair enough.
But they England batsmen should be able to make 200 (given time), right?
If England have to chase 200 I don't think there is any chance they get them.
Pietersen apart everybody has found it hard to score runs quickly this match. If Sri Lanka continue at their current match rate of 2.44 rpo and score the 166 to make england chase the 200, then they will use up ~ 68 overs( -2 for changeover), which leaves england with 20 to chase 200.
Even if Sri Lanka score at 3 rpo they use up ~ 55 overs(+2 for changeover) leaving england chasing 200 in 33 overs.
3.5 rpo leaves england chasing 200 in 41 overs(ie. 5rpo)
Now I don't see England being able to chase any of these scores given the winter they've had and the fact it's a fifth day pitch
Did some further calculations
Sri Lanka bat 30 overs - England win( at least the scoring rate should be well within normal standards, who knows whether england can chase 120!)
Sri Lanka bat 40 overs - score at 2.5 rpo. England chase 134 in 48 overs
score at 3 rpo. England chase 154 in 48 overs.
Within bounds. Second one is nervous.
Sri Lanka bat 45 overs - Score at 2 rpo. England chase 124 in 43
score at 2.5 rpo. England chase 147 in 43
score at 3 rpo. England chase 169 in 43
First two feasible and should do. Third I'd be worried about because Pietersen apart no-one has scored at more than 3 rpo consistently
Sri Lanka bat 50 overs - Score at 2 rpo. England chase 134 in 38 overs
score at 2.5 rpo. England chase 159 in 38
score at 3 rpo. England chase 184 in 38
I'd have serious misgivings about the last two and we should do the first but would be nervous
Sri Lanka bat 55 overs - Score at 2rpo. England chase 144 in 33 overs
score at 2.5 rpo. England chase 172 in 33 overs
score at 3 rpo. England chase 199 in 33 overs
They might do the first one( but it's unlikely that Sri Lanka score quite as slowly as that) but I can't see them getting the other two
Basically I think if Sri Lanka bat anything more than 45 overs England winning becomes very unlikely
Sri Lanka actually still have a good outside chance of winning because England will probably have to go for all of these chases because they would want to maintain their number 1 test spot. If England need 169 in 43 overs they would have to go for it but given the wearing nature of the wicket, the nervous batting of the team and the difficulty of scoring runs quickly on the wicket I could see England collapsing. (and sri lanka can put the fielders where they want- so probably go in/out early. i.e sweepers and close men.)
So basically in summation, I'm going to get really worried if Sri Lanka are still batting after lunch and if they set England anything over 140, England maybe getting a winter whitewash.