Article 1410 of rec.games.corewar:
Newsgroups: rec.games.corewar
From: pk6811s@acad.drake.edu
Subject: ring killers - and more
Message-ID: <1992Oct21.102041.1@acad.drake.edu>
Lines: 48
Sender: news@dunix.drake.edu (USENET News System)
Nntp-Posting-Host: acad.drake.edu
Organization: Drake University, Des Moines, Iowa, USA
Date: Wed, 21 Oct 1992 16:20:41 GMT

Looks like everyone has a solution to the imp-ring problem.  Here's mine:

;redcode
;name Eclipse
;author P.Kline
;strategy bscan, ringkiller, clear
;strategy demo-only version
hold     dat #0
ptr      dat #stun
next     add #2234,ptr
scan     jmz next,@ptr      ; scan for non-zero
         slt #14,ptr        ; check for me
         jmp next,hold
inc      mov @ptr,hold      ; save whatever is pointed to
stun     mov bomb,@ptr      ; drop a stunner
         add hold,ptr       ; bump pointer up the trail
         cmp #-1,hold       ; don't follow djn streams
         jmn stun,@ptr      ; follow the trail
         djn next,#4        ; check for enough
bomb     spl 0
         mov 2,<-1
         jmp -1
         end next

Eclipse is based on a program I wrote a couple of years ago to destroy
pit-trappers, the kind that dropped 'jmp @0,trap' bombs.  All you had to
do was add the b-field (trap) to your pointer and you had the location
of the trap, which also happened to be the location of the pit-trapper.
Unfortunately that style of snare was changed to jmp trap,coresize-trap,
and my Hunter program became useless.

First time I tried Hunter, it demolished IMPire with no problem, 
so I streamlined it as above. 

The current version of Eclipse (not shown) is also effective against
modern pit-trappers as well as RotlD2, and probably any other programs
that drop pointers to their position all over core.  Unfortunately
it is a little too big in its present form, but it will be back Real Soon Now.

Eclipse is also effective against the kind of paper replicators that
form colonies - a result of not bumping the 'next' location after
each copy is made.  Once it finds a small-number b-field, say '4' or '8',
it works its way through the colony, dropping stunners along the way.
Unfortunately Note Paper, Flash Paper, etc. aren't around anymore to
beat up on.

Paul Kline
pk6811s@acad.drake.edu