At Kahuku, the host Red Raiders (8-2-1) blanked Waipahu, the West's fourth seed, 4-0 and third-seeded McKinley beat Nanakuli, the West's second seed, 2-1.

At Kailua, the host and second-seeded Surfriders beat Wai'anae, the West's third seed, 2-0. Farrington, the East's fourth seed, upset West No. 1 Campbell 1-0.

In tomorrow's semifinals at Kahuku, Kailua (6-4-1) plays Farrington (3-7-1) at 5:15 p.m. and Kahuku plays McKinley (5-4-2) at 7.

The winners advance to Saturday's championship game at Mililani. Losers will play in Friday's third-place game for the league's third and final state tournament berth.

O'ahu Interschoalstic Association

Boys soccer playoffs

White Division

Yesterday

Quarterfinals

At Kahuku

E3 McKinley 3, W2 Nanakuli 1

E1 Kahuku 4, W4 Waipahu 0

At Kailua

E4 Farrington 1, W1 Campbell 0

E2 Kailua 2, W3 Wai'anae 0

Tomorrow

Semifinals

At Kahuku

E2 Kailua (6-4-1) vs. E4 Farrington (3-7-1), 5:15 p.m.

E1 Kahuku (8-2-1) vs. E3 McKinley (5-4-2), 7 p.m.

Friday

At TBA

Third place—Semifinal losers, 5:15 p.m.

Saturday

At Mililani

Championship—Semifinal winners, 4 p.m.