Chesterfield's caretaker boss Lee Richardson saw his side escape relegation by the narrowest of margins then ruled out taking on the job full-time.
Richardson, in only his second game in the hot seat, saw his side play out a draw at Bloomfield Road while Bobby Gould's Cheltenham side were beaten at Notts County.
Both sides started nervously with Blackpool playing the better football but frustrated by a solid Chesterfield defence, while the Spireites forwards seemed happy to shoot from any distance.
Chesterfield made the breakthrough on 38 minutes when the ball fell kindly to John Douglas after David Reeves, who had intercepted Rick Wellens aimless ball across his own penalty area, had seen his shot well saved by Phillip Barnes.
Blackpool stepped up a gear in the second half and finally found their way through on 64 minutes when a clever short corner from the lively Martin Bullock found Scott Taylor, who hit a vicious left-footed shot which left Carl Muggleton with no chance.
It was all Blackpool from there on in, with Muggleton forced to make a good save from substitute Paul Robinson while the home side also had what looked like a strong penalty appeal when Kevin Dawson appeared to bring down Richard Walker.
There was a penalty at the other end on 82 minutes when Philip Barnes fouled Rob Edwards inside the area.
However, Barnes reacted superbly to tip Reeves' spot kick onto the post, leaving the 3,000 visiting fans with a nervous wait for the result from Meadow Lane.
Richardson said after the game, "I am delighted with the result, the players did everything I asked of them. The only disappointment is that they didn't win the game which I thought they deserved to.
"I am delighted that Notts beat Cheltenham, though I am sorry for Bobby Gould who has made a brave attempt at getting them out of trouble." Blackpool boss, Steve McMahon, said, "The season is over, thank goodness, now we can begin making plans and getting the players in for next season."