NC decoy is a stone/imp which entered the Intel 88 hill in November 1993 and survived over 445+ challenges.

;redcode
;name NC decoy
;author Wayne Sheppard

;Small bomber with quick startup
;launch small spiral
;avoid long startup delays

imp  equ impcopy+1700+1  ;imp start
hide equ 1600         ;stone location
stone spl 0,<-100       ;Stone is only four lines long
mov <-41,1-2234
add 1,-1          ;mod 2 pattern
jmp -2,<-2234     ;converts to addition coreclear
start mov stone+3,hide         ;Copy stone
mov stone+2,<start       ;to a safe place
mov stone+1,<start
mov stone,<start
spl start+hide-3,<4000   ;1st split to stone
spl start+hide-3,<4000   ;2nd split to stone
spl start+hide-3,<4000   ;3rd split to stone
ring spl 9,<4050              ;binary ring
spl 5,<4100              ;startup
spl 3,<4150
mov impcopy,imp          ;puts imp away from decoy
jmp start+hide-3,<4200   ;4th split to stone
jmp imp,<4250
spl 2,<4300
jmp 2667+imp,<6350
jmp 5334+imp,<4400
spl 4,<4450
spl 2,<4500
jmp 1+imp,<4550
jmp 2668+imp,<4600
spl 2,<4650
jmp 5335+imp,<4700
jmp 2+imp,<4750
impcopy mov 0,2667
FOR MAXLENGTH-CURLINE
mov 0,2667
ROF
end start