SAN JOSE, Calif. — The effort was excellent, but the execution wasn’t good enough. The Avalanche played extremely hard Thursday night but blew a glorious chance to improve its Western Conference playoff odds at SAP Center, losing 4-2 to the San Jose Sharks and goalie Martin Jones (23 saves). “We worked as hard as we possible could tonight and all four lines were going,” Avs left wing and team captain Gabe Landeskog said.