Backstabber is a scanner with a fixed-length attack which entered the Intel 88 hill in April 1993 and survived 316+ challenges before being pushed off in June. Backstabber also entered the EBS Summer Tournament 93.
;redcode ;name Backstabber ;author Anders Ivner ;strategy Brief scanner. ; Oh well, I don't know. I guess this one has as much chance as anything ; else. dist equ 19 step equ 3094 start add const, scan scan cmp -dist, 0 slt #20+dist, scan jmp start mov #19+dist, cnt mov scan, @loop loop mov glue, <scan+11 cnt djn loop, #0 djn start, #20 ;how many times? spl 0, <-3 clr2 mov gate, <-2 jmp -1, <-5 dat #0 gate dat <-4, <-5 const dat #step, #step glue spl -1, 1 end start