Harry Hall opens three-stroke halfway lead at Charles Schwab Challenge

Cornish rookie Harry Hall fired four consecutive birdies around the turn as he took a three-shot halfway lead in the Charles Schwab Challenge (LM Otero/AP)

Cornish rookie Harry Hall fired four consecutive birdies around the turn as he took a three-shot halfway lead in the Charles Schwab Challenge.

Hall followed his opening-round 62 with a 66 as he moved to 12 under par, three clear of American Harris English who lit up his round of 66 with a hole in one at the eighth at the Colonial Country Club at Fort Worth, Texas.