Aaron Brown led Capitol Hill with 14, hitting all four of his fourth-quarter free throws.
The Redskins were 12 of 15 from the line in the fourth. Smith led Southmoore with 12 off the bench.
Sam Grellner made two late free throws to put Okarche in the semifinals of Kingfisher's Buckle of the Wheatbelt Invitational.
The Warriors defeated Kingfisher 41-39 after Grellner hit a pair of free throws with 9.8 seconds to put Okarche on top. Kingfisher had scored seven straight points to take the lead before Grellner's free throws.
Grellner finished with 15 points, and John Schaefer had 12 for Okarche. Kingfisher was led by Tristan McClellan with 17 points.
BALANCED ATTACK POWERS HERITAGE HALL
Heritage Hall didn't need a big individual effort on Thursday, but did away with McLoud 51-41 behind a balanced attack.
Chris Hamilton led the Chargers with 10 points and four others had at least six. Heritage Hall built its lead to 40-22 after three quarters and held on from there. Michael Byington led McLoud with 20 points.
The Chargers will face Bethany at 5:25 p.m. in Friday's semifinals. The Bronchos advanced with a 61-48 win over Chisholm behind 22 points from Josh Lout and 18 from Tanner Stiles.
Mike Jones scored 27 for El Reno, but it wasn't enough in a 65-44 loss to Norman North at the Shawnee Invitational. Three Norman North scorers reached double-figures, led by Kairo Rutledge with 18. ... Rashawn Thomas had 25 points in Southeast's 68-44 win over Shawnee. ... David Love's 21 points led McGuinness to a 68-49 win over Northwest Classen at Moore's John Nobles Invitational. ... John Marshall's Trel Parker scored 38 points to lift the Bears to an 80-60 win over Jones at the Jones Tournament.