Val Sweeting's Alberta rink jumped on Saskatchewan's mistakes for an 8-7 victory in the third-versus-fourth playoff game Saturday at the Scotties Tournament of Hearts.

Saskatchewan's Stefanie Lawton left draws well short in the seventh and eighth ends to allow Alberta to steal five points and put the match out of reach, even if Lawton made a late comeback bid.

Sweeting will face Manitoba's Chelsea Carey in the semifinal later Saturday, with the winner advancing to the final on Sunday night against defending champion Canada, skipped by Ottawa's Rachel Homan.

Saskatchewan looked to have taken control with a steal of one in the fifth for a 3-1 lead, but things went south after the break.

Lawton missed a double takeout that gave Sweeting an easy two to tie it in the sixth. Then Lawton left a draw short to give Alberta a steal of two in the seventh for their first lead of the game.‚Äč

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With her win over Saskatchewan, Alberta's Val Sweeting will move on to the semifinal game against Manitoba. (Nathan Denette/The Canadian Press)

A crisp Sweeting double takeout in the eight left a crowd of Alberta stones in the house. Lawton tried to draw into them, but a groan went up from the grandstands at the Maurice Richard Arena as she left it short again for a steal of three.

She rebounded with two in the ninth, and Sweeting's rink played with fire in the 10th by letting Saskatchewan put stones in the house. But a Sweeting takeout sealed the victory despite Saskatchewan's steal of two.

Lawton finished third in round-robin play at 8-3, but lost to Yukon (2-9) in her last game on Friday. Fourth-place Sweeting had lost 8-6 to Lawton in the round robin.