EVANSTON — After opening the lockout-shortened NHL season with the first set of games on Saturday, officials from the Norris University Center have sent an urgent plea to NHL commissioner Gary Bettman to cancel more games, citing the need for “ice maintenance.” Norris issued a press release that stated, “Our ice-readiness experts have spent years studying the advanced science of what is frozen water and what is not. It is their belief from viewing the NHL’s Saturday games that these