Worksop Town discovered their play-off fate after a 3-1 defeat at home to Frickley at Sandy Lane on Saturday.
The result meant Tigers finished fourth in the Northern Premier, securing a play-off semi-final at Fylde on Tuesday, and it also made Frickley safe from the drop.
A very young Worksop side did well enough, but were always going to struggle after the controversial sending off of centre-half Tom Burgin.
Mark Shaw opted to rest the majority of his regulars, with a number of Under 19 players getting starts - the oldest player in the side Jamie Jackson at 27.
And the ‘veteran’ striker should have opened the scoring, but fired over from Evan Garnett’s cut back after good work from Nick Hague.
Tom Elliott, then set Jack Muldoon on a run and the skipper for the day saw his blast saved by Ben Simpson.
Frickley began to get on top as the first half wore on, before a moment of Worksop magic.
Elliott swung the ball left where Josh Thomas was waiting to stride forward and then fire home a beautiful shot from 35 yards.
The goal clearly lifted the hosts, who looked dangerous on the attack, Muldoon with another fierce effort that was deflected wide.
Leon Osborne had the visitors’ best chance of the first half hour, running onto the ball on the left side of the box and firing it off target.
Luke Hinsley came even closer when he lofted the ball over Jon Stewart and watched in agony as it failed to creep inside the post.
Stewart pulled off a decent save to keep out Stephen Wakefield and the Tigers goal lived a charmed life seconds later when Hinsley headed over Stewart but onto the bar.
Tigers broke through Muldoon and when his pass was deflected into Elliott’s run it looked like number two, his lob landed on the net however.
Worksop began the second half well, Elliott testing Simpson with a low strike.
Seconds later a fantastic ball from Elliott found Jackson and he headed just wide.
Frickley got back into the game with what was either a wonderstrike or a piece of real luck, Jimmy Ghaichem knocking into the top corner from wide on the right.
Three minutes later disaster struck for Tigers, Burgin - the last man - felling Andy Villerman and although he looked to have got the ball, the referee deemed it a foul, sent him off and awarded a penalty.
Gavin Allott stepped up to take the spot-kick and beat Stewart for a 2-1 lead.
It should have been 2-2 when Thomas found Garnett six yards out and he shot wide.
But Frickley sealed victory when Allott went all the way down the right touchline, cut in at the byline and somehow managed to get the ball to another former Tiger, Luke Sharry to hammer home.
Frickley celebrated wildly at the final whistle, while Tigers thanked their fans for their support ahead of the biggest game of the season.
Worksop: Stewart 7, Hague 6, Johnson 6 (Wall 67), Clay 6, Salt 6 (Burgin 41), Burrell 6, Muldoon 6 (Higginson 46 6), ELLIOTT 7, Jackson 6, Garnett 6, Thomas 6. Not used: Mettam, Turner.
Frickley: Simpson, Amdal, Jeffs, Wakefield, Denton, Picton, Ghaichem, Sharry, Hinsley (Villerman 50), Allott, Osborne (Dratz 90). Not used: Stratford, Rose.
Referee: W. Grunnill. Assistants: C. Andrews, P. Andrews.
Goalscorers: Thomas 19; Ghaichem 61, Allott 64 (pen), Sharry 81
Yellow: Ghaichem 90
Red: Burgin 64