see Brackets for Section XI Tournament
http://www.sectionxi.org/TOUR/bbkb.htm 

Regional Semi-finals
3/7
Class D: Bridgehampton at Chapel Field Christian, SS Seward Institute, 7 pm
3/8
Class B: Southampton at Malverne, Hofstra, 6 pm

Regional finals
3/10
Class B: Valhalla at Southampton, ESM HS, 6:30 pm
Class C:  Haldane at Pierson, ESM HS, 4 pm

Regional finals
3/11
Class AA: Baldwin at Brentwood, 4:30 pm at Stony Brook University
Class A: South Side at Kings Park, 2 pm at Stony Brook University

NYSPHSAA Championship
https://nysphsaa.org/tournaments/?id=3&path=