Stuart Broad admits England are battling the weather as well as the West Indies as they look to force victory in the second Test.
Persistent rain showers in Grenada have proved a frustration after last week's attritional stalemate in Antigua, with 50 overs already lost over the first two days.
The pitch at the National Stadium has given few indications that it will become a bowler's paradise anytime soon, meaning plenty of time could be needed to force a result.
England bowled the hosts out for 299 and ended day two on 74 without loss, courtesy of a steady opening stand from under-pressure openers Alastair Cook (37no) and Jonathan Trott (32no).
And with unpredictable forecasts around, Broad knows only full days of cricket and a sizeable first-innings lead will leave the tourists on track.
"The only way we can win is by getting 400, 450 in the first innings and applying pressure that way," he said.
"We need a bit of lady luck, blue skies in the morning and hopefully there's not too much swing.
"You can't have mornings like we've had on every day of the Test or it will be a draw.
"But we've got a pretty simple job from now, which is to bat a day and half to two days because I don't think anyone really knows how this wicket will behave late on day three, four or five."
Broad was full of praise for Cook and Trott for their gritty work at the head of the innings.
Both men are under the microscope following failures in the first Test, Cook battling a long-term downturn and Trott attempting to prove his recall after 18 months was the right decision.
"It was great to see - a bit old school - a Cook-Trott fifty partnership again," he said.
"It's been a few years but there's some fantastic memories of those two batting together and hopefully we can see more of the same.
"It's been quite a common theme here that the new ball has got wickets so to have got through it with these two at the crease is a big bonus, they've looked fantastic."
Broad played his own part in advancing the game by nipping out three West Indian wickets in the space of 20 balls in the afternoon.
It was his best, and by some distance his fastest, spell in the Caribbean and he credits it to a minor correction in his action.
"I made a slight technical change overnight," he explained.
"I watched quite a lot of footage from the last two years of my wickets.
"I'd been bowling a little bit tighter to the stumps which was stopping me getting my hips through and taking my momentum away.
"So I went a bit wider in my run-up. It was only a really small change, back to what I'd been doing last summer and 18 months before that, and it seems to have worked.
"I was really pleased with how I bowled."
Source: PA
