LINNETS strengthened their promotion push on Saturday by pulling back two more points on long-time leaders Winsfo rd .
But Runcorn made hard work of what ought to have been a comfortable victory with their second-half display.
Even Dave Thompson's 53rd-minute goal - doubling their lead - couldn't inspire them.
A side with more ability and belief than Blackpool might have capitalised once David Berry had ghosted onto namesake sub David (John) Berry's 57th-minute cross to head in.
Linnets, however, should surely have had a late penalty when sub Jay Swales' rebound effort to his own shot was handled by a defender on the line.
That opportunity had been created by Colin Quirk, who nodded Runcorn in front midway through the first half.
Linnets: Holcroft, Holmes, Flood, O'Driscoll, Boden, Edwards (Swales 77), Dee, Quirk, Thompson, Scott, McCoy. Subs: Foran, Rollinson.