Hosts Karnataka began its season with an impressive innings and 121-run victory against Assam in the Ranji Trophy match played at SDNW Stadium in Mysuru today.With the massive win, Karnataka earned full seven points in their first encounter. Assam, who lost their second match, has one point to its credit with a draw against Delhi in its first encounter. Assam, resuming at 169 for six, still needing 155 runs to make Karnataka bat again, could add just 34 runs to their overnight score before losing all its wickets for 203 runs.In reply to Assam's paltry 145 in the first innings Karnataka had replied with a massive 469 for 7 declared. Brief Scores:Assam 145 and 203, Karnataka 469 for 7 declared.