Lady luck deserted Blackpool at Bloomfield Road, as a late penalty saw Derby County move to the summit of The Championship.
Having squandered a number of first-half chances, Derby's pressure eventually told on Pool when Tony McMahon tripped Johnny Russell inside the box.
Chris Martin made no mistake from the spot to punish Blackpool for their lapse in concentration at the back.
Nathan Delfouneso and Ishmael Miller were both guilty of missing chances, but high-flying Derby prevailed in the horrendous conditions.
It was the high-flying Rams who threatened first on a blustery night in Lancashire, as Jeff Hendrick curled an effort over the bar, while Jordan Ibe dragged his strike wide.
Far from being outplayed however, Blackpool were holding their own, and were almost rewarded as Miller's effort curled away from the top corner at the last minute.
A speculative pump forward from Peter Clarke was the next to cause Derby problems, with McMahon showing great desire to win the ball on the byline, before forcing a save from new loan signing Jack Butland.
Miller was posing a real threat to The Rams, and stung the palms of Butland soon after. However when the best chance so far arrived Delfouneso squandered it for The Seasiders, clearing the crossbar from yards out.
The side-netting was next to deny Pool, as Miller's header flew the wrong side of the post.
As the game approached half time the visitors started to click and after having nothing to do so far, Joe Lewis was called into action to deny Omar Mascarell and Russell.
The stopper was stepping up when called upon, and next clawed Hendrick's header to safety, and that proved the final opportunity of the half.
Half Time: Blackpool 0 Derby 0
After the interval Derby began to take control, and Ryan Shotton tested Lewis with a long-range drive.
Fresh from his goal on the weekend, Donervon Daniels headed a John Lundstram corner over the bar, while Lewis showed fantastic agility to tip Russell's powerful effort out for a corner.
With 23 minutes remaining José Riga opted to mix things up, bringing on Jacob Mellis and Francois Zoko in place of Andrea Orlandi and Edu Oriol.
A further disappointment for the evening arrived when McMahon went in late on Ibe, collecting his fifth booking of the season and ruling himself out of Saturday's trip to Reading.
And the defender's night got worse on 80 minutes, as Russell ran at him with pace, enticing a trip and earning a penalty. Martin made no mistake from 12 yards, blasting his kick past Lewis.
The Seasiders pushed forward late on, but couldn't force an equaliser and remain bottom of the table.
Full Time: Blackpool 0 Derby 1
By Mark Ridgway