Calcutta, Nov. 3 :    Calcutta, Nov. 3:  Soujan Biswas was Bengal's man of the day. His seven for 43 from 31.2 overs ensured his team a much-needed eight-wicket victory over Bihar in the Cooch Behar Trophy encounter at Eden Gardens today. Bengal claimed eight points from this win, giving their tally a desperate boost to make it 16 after three matches. Bihar, resuming on 65 for two, added just 100 more - setting Bengal a paltry target of 50 for victory. Bengal lost two wickets - Ajoy Garai for four and Manavendra Yadav for two. Opener Avishek Chakraborty and skipper Aranya Deb Sarkar saw Bengal through. It was a hard-earned win since Bengal had been tottering on 64 for seven yesterday in reply to Bihar's first-innings total of 142. Bowlers Sudip Palit and Samrat Guha had then put on a 135-run stand to snatch a healthy first-innings lead of 116. There was no stopping Biswas today, and Bihar had no answer to the young spinner. Both the wickets lost by Bihar yesterday were his victims. Ravish Kumar top scored with a patient 72 from 170 balls. The next highest score was 26 by M.J. Prakash. Bengal made two changes for the under-19 one-dayer against Bihar tomorrow, Anirban Chatterjee and Sourav Shukla replacing Subhankar Roy Chowdhury and Avishek Chakraborty. BRIEF SCORES: Bihar 142 & 165 (Ravish Kumar 72; Soujan Biswas 7/43, S. Palit 2/11). Bengal 258 & 51/2. Bengal won by 8 wkts. Orissa win Orissa beat Assam by seven wickets on the third and final day of their Cooch Behar Trophy match in Cuttack, adds PTI. Orissa, who gained eight points with the win, now have 24 from three encounters, having defeated Sikkim and Tripura earlier. Overnight 297 for eight, Orissa were all out for 343. Assam were bowled out for 79 in 27.1 overs to set Orissa a target of 16, which they achieved in 9.5 overs, but only after losing three wickets, all to Dhiraj Goswami. Girish Mall and Purna Moharana wrecked the Assam innings with four wickets each.