Director Terence Young's eye for realism was evident throughout production. For the opening chess match, Kronsteen wins the game with a reenactment of Boris Spassky's victory over David Bronstein in 1960. Production Designer Syd Cain built up the "chess pawn" motif in his $150,000 set for the brief sequence. Cain also later added a promotion to another movie Eon was producing, making Krilencu's death happen inside a billboard for "Call Me Bwana". A noteworthy gadget featured was the attaché case (briefcase) issued by Q Branch. It had a tear gas bomb that detonated if the case was improperly opened, a folding AR-7 sniper rifle with twenty rounds of ammunition, a throwing knife, and 50 gold sovereigns. A boxer at Cambridge, Young choreographed the fight between Grant and Bond along with stunt coordinator Peter Perkins. The scene took three weeks to film and was violent enough to worry some on the production. Robert Shaw and Connery did most of the stunts themselves.