Night of the Living Dead is a hydra-style warrior with 8 anti-imp clears which entered the 88 hill earlier this month. It scores well again stone/imps but badly against oneshots.

The code is also available here:

https://corewar.co.uk/nightofthelivingdead.htm

;redcode
;name Night of the Living Dead
;author John Metcalf
;strategy qscan -> living dead
;assert CORESIZE==8000

; qscan - 36 scans in 48 instructions

qfirst equ (qp2+2*qstep)
qdist equ qfirst+130
qstep equ 260

qi equ 7
qr equ 7

qbomb dat <qi/2-qi*qr, <qi*qr-qi/2

qa equ qstep*16
qb equ qstep*5+2
qc equ qstep*10
qd equ qstep*2
qe equ qstep*1

qscan cmp qdist+qc, qfirst+qc
jmp qfast, <qa
cmp qdist+qe+qd, qfirst+qe+qd
qp1 jmp <qfast, <qc
qp2 cmp qdist, qfirst
qp3 jmp qskip, <qe

cmp qdist+qb, qfirst+qb
q1 djn qfast, #qp1

cmp qdist+qd+qc, qfirst+qd+qc
jmp qslow, <qfirst+qd+qc+4
cmp qdist+qd+qb, qfirst+qd+qb
x1 jmp qslow, <q1
cmp qdist+qc+qc, qfirst+qc+qc
q2 djn qslow, #qp2
cmp qdist+qd, qfirst+qd
jmp qslow, <qfast
cmp qdist+qa, qfirst+qa
jmp q1, <q1

cmp qdist+qa+qd, qfirst+qa+qd
jmp x1, <q1
cmp qdist+qc+qb, qfirst+qc+qb
jmp q2, <q1
cmp qdist+qe+qd+qc,qfirst+qe+qd+qc
jmp qslower, <qfirst+qe+qd+qc+4
cmp qdist+qe+qd+qb,qfirst+qe+qd+qb
jmp qslower, <q1
cmp qdist+qe+qc+qc,qfirst+qe+qc+qc
jmp qslower, <q2
cmp qdist+qd+qd+qc,qfirst+qd+qd+qc
q3 djn qslower, #qp3
cmp qdist+qe+qc, qfirst+qe+qc
jmp <qfast, <q2
cmp qdist+qd+qd, qfirst+qd+qd
jmp <qfast, <q3
cmp qdist+qd+qd+qb,qfirst+qd+qd+qb
slt <q3, <q1

jmz warr, qdist+qe+qd+qc+10

qslower add @q3, @qslow
qslow add @q2, qkil
qfast add @q1, @qslow

qskip cmp <qdist+qstep+50, @qkil
jmp qloop, <1234

add #qdist-qfirst, qkil
qloop mov qbomb, @qkil
qkil mov <qfirst+qstep+50, <qfirst
sub #qi, @qloop
djn qloop, #qr+2

; boot - binary launch 8 clears

dfirst equ 4200
dinc equ 200

boot equ warr+100
bgap equ 917

cpos equ -5-bgap*5

warr spl x, <dfirst+dinc*0
spl y, <dfirst+dinc*1
spl b1, <dfirst+dinc*2

b0 mov d, boot+0*bgap
mov m, <b0
mov s, <b0
djn @b0, <dfirst+dinc*3

b1 mov d, boot+1*bgap
mov m, <b1
mov s, <b1
djn @b1, <dfirst+dinc*4

y spl b3, <dfirst+dinc*5

b2 mov d, boot+2*bgap
mov m, <b2
mov s, <b2
djn @b2, <dfirst+dinc*6

b3 mov d, boot+3*bgap
mov m, <b3
mov s, <b3
djn @b3, <dfirst+dinc*7

x spl z, <dfirst+dinc*8
spl b5, <dfirst+dinc*9

b4 mov d, boot+4*bgap
mov m, <b4
mov s, <b4
djn @b4, <dfirst+dinc*10

b5 mov d, boot+5*bgap
mov m, <b5
mov s, <b5
djn @b5, <dfirst+dinc*11

z spl b7, <dfirst+dinc*12

b6 mov d, boot+6*bgap
mov m, <b6
mov s, <b6
djn @b6, <dfirst+dinc*13

b7 mov d, boot+7*bgap
mov m, <b7
mov s, <b7
djn @b7, <dfirst+dinc*14

; anti-imp clear

s spl 0, <d
m mov 0, <d
d djn s, #cpos

end qscan

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