Dumbarton are just 90 minutes away from retaining their place in the second tier after a 1-0 win at Alloa in the Championship play-off final first leg.It took the Pars just six minutes to go ahead when Stuart Carswell rifled home from 25 yards after picking up a pass from Danny Handling.The Wasps come close to hauling themselves level moments later but Jordan Kirkpatrick saw his effort come back off a post.Kevin Nisbet went close for Dumbarton after the break, while at the other end only a last-gasp block from Craig Barr prevented Calum Smith from scoring from just six yards out.