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> Home > The Corewar Newsletters > Core Warrior > Issue #1

Issue 1                                                            16/10/95


Hi people,
with this number we begin a new newsletter to cover main arguments of corwar
game, following the steps of Paul Kline's '_push off_' and Brant Thomsen's
'The 94 Warrior'.
Hints, suggestions, criticism are welcome; as is welcome anyone wanting to
join the staff. This number is care of Beppe Bezzi <bezzi@iol.it> and next
one will be made by Myers Bremer <bremermr@ecn.purdue.edu>, we hope to have
a couple of others, so as we can post the newsletter weekly, without too
much effort, in a rotating schedule.
Come on ad join, the pay isn't good but you can write for something with a
worldwide distribution :-)

Most care will be taken of the -94 hill, the one where best battles are,
other hills will have only reports of main events, unless some fight will
start in them too. This week we cannot cover the beginners hill because the
test warrior submitted got meaningless results. Hope the bug in Pizza's
hills will soon be fixed.
First contribute to Core Warrior was from Andersen F. Scholl, that sent me
the header, thanx.

----------------------------
For everyone interested in Corewar

FAQs are available by anonymous FTP from rtfm.mit.edu as
pub/usenet/news.answers/games/corewar-faq.Z
FTP site is: ftp.csua.berkeley.edu /pub/corewar
Web pages are at:
http://www.stormking.com/~koth
http://www.ecst.csuchico.edu/~pizza/koth

----------------------------------------------------------------------------
94 Hill - Standings

 #  %W/ %L/ %T                      Name               Author   Score     Age
 1  45/ 41/ 13       Leprechaun on speed         Anders Ivner     150      15
 2  37/ 31/ 32                 Torch t18              P.Kline     143     219
 3  40/ 37/ 23               myVamp v3.7             Paulsson     143     187
 4  35/ 28/ 37           Jack in the box          Beppe Bezzi     142     207
 5  24/  6/ 70                  Die Hard              P.Kline     142       4
 6  40/ 38/ 23               Armory - A5            Wilkinson     141     358
 7  37/ 34/ 29                       Phq    Maurizio Vittuari     141     321
 8  35/ 31/ 34              Father & Son    Maurizio Vittuari     139      77
 9  41/ 44/ 14                Frontwards       Steven Morrell     139     154
10  42/ 46/ 12   Anti Die-Hard Bevo (3c)       John Wilkinson     139      24
11  35/ 33/ 32                Brain Vamp  B.Bezzi, M.Paulsson     138      89
12  37/ 37/ 26              Thermite 1.0        Robert Macrae     137     782
13  41/ 46/ 13             Super Bevo 4a       John Wilkinson     137       1
14  40/ 45/ 15         Leprechaun deluxe         Anders Ivner     136     124
15  35/ 35/ 30              Firestorm 08          Beppe Bezzi     134      75
16  41/ 49/ 10              SandBlast 1a    John K. Wilkinson     134      35
17  35/ 39/ 26               Tornado 1.8          Beppe Bezzi     131      73
18  34/ 40/ 26                Cthulhu v7    John K. Wilkinson     129      47
19  24/ 28/ 48                  Twimpede              Jay Han     120       6
20  26/ 33/ 42                replicator           M R Bremer     119       2


In this moment we have standard non-p warriors in majority on the hill and
keeping strongly the top with the q-scanner Leprechaun on speed followed by
the bomber Torch and the vampire myVamp; the first switcher is Jack in the
box, followed by Paul's mysterious object Die Hard, that now seems to die a
little and score a lot more. Comparing scores with last week's ones, is
worth noting the rise of Armory from the bottom to near the top, this
veteran seems to have found a new life.

--------------------
94 - What's new

This week many new warriors have appeared in the 94 hill, to disappear short
after; the tournament first round imposed maximal secrecy to everyone (but
me :-) Worth noting are:

 1  35/ 25/ 40                test jtm09          Beppe Bezzi     145       1
 1  39/ 34/ 27                  aMixture             Paulsson     144       1
 2  47/ 40/ 13       Leprechaun on speed         Anders Ivner     153       1
 4  30/ 21/ 49                test jtm08          Beppe Bezzi     139       1
 5  43/ 45/ 12   Anti Die-Hard Bevo (3c)       John Wilkinson     141       1
 5  44/ 47/ 10                     TESTP    Maurizio Vittuari     141       1
 6  25/ 10/ 65                  Die Hard              P.Kline     140       1

Of those new warriors only Leprechaun on speed and Anti Die-Hard Bevo are
still on hill, others were but tests for the tournament, maybe we'll see
them on hill soon.
-----------------------
94 - What's no more

Only one near 100 :-(

21  27/ 24/ 49            Dirty thinking          Beppe Bezzi     130      98

The real scoop was last week
21  38/ 53/  9                  Agony II        Stefan Strack     122     912

Congratulation Stefan, you are number 2 in 94 Hall of Fame
----------------------
What's old

12  37/ 37/ 26              Thermite 1.0        Robert Macrae     137     782
 6  40/ 38/ 23               Armory - A5            Wilkinson     141     358
 7  37/ 34/ 29                       Phq    Maurizio Vittuari     141     321
 2  37/ 31/ 32                 Torch t18              P.Kline     143     219
 4  35/ 28/ 37           Jack in the box          Beppe Bezzi     142     207
 3  40/ 37/ 23               myVamp v3.7             Paulsson     143     187
 9  41/ 44/ 14                Frontwards       Steven Morrell     139     154

Thermite is dominating the age scoring; now is in 4th place in the Hall of
Fame passing Blue Funk 3
-------------------------

HALL OF FAME
* means the warrior is still running; > score isn't exact

Pos    Name                  Author          Age     Strategy
 1  Iron Gate 1.5          Wayne Sheppard    926    CMP scanner
 2  Agony II               Stefan Strack     912    CMP scanner
 3  Blue Funk              Steven Morrell    869    Stone/ imp
 4  Thermite 1.0           Robert Macrae     782 *  Qscan -> bomber
 5  Blue Funk 3            Steven Morrell    766    Stone/ imp
 6  HeremScimitar          A.Ivner,P.Kline   666    Bomber
 7  B-Panama X             Steven Morrell    518    Stone/ replicator
 8  NC 94                  Wayne Sheppard    387    Stone/ imp
 9  Cannonade              P.Kline          >378    Stone/ imp
10  Torch t17              P.Kline           378    Bomber
11  Armory - A5            Wilkinson         358 *  P-warrior
12  Lucky 3                Stefan Strack    >350    ?
13  Request v2.0           Brant D. Thomsen  347    Qvamp -> vampire
14  Dragon Spear           c w blue          346    ?
15  juliet storm           M R Bremer        333    Stone/ imp
16  TimeScape (1.0)        J. Pohjalainen    322    Replicator
17  Phq                    Maurizio Vittuari 321 *  P-warrior
18  Rave 4.1               Stefan Strack     320    CMP scanner
19  Christopher            Steven Morrell    289    Vampire
19  Aeka                   T.Hsu             289    Stone/ imp
20  Marcia Trionfale       Beppe Bezzi       246    Replicator

That's all I was able to do. I have a 'hole' from last number of -The 94
Warrior- and the beginning of my personal archives in june 95.
I need help from you to fill the Hall of Fame exactly, in particular exact
scores of Lucky and Cannonade and missing or wrong strategies. TIA

------------------
Nandor's and Stefan's Fall Core War Tournament (NSFCWT)
(details at http://www.stormking.com/~koth/nsfcwt.html)

Round one is just finished, the battle was really an hard one and half the
contenders are closed in a single point difference. The strategic choices of
players have been different, some choose to play best in standard, some in
multi, and some made a compromise. Two of the warriors mentioned before in
-What's new- have showed down in the tournament (yes my testjtm09 is Rhino,
and it's not very different from the one I published :-) while some have
used their warriors in the 94 hill.
Now the challenge is against the White warrior.

I hope many more will join the tournament, it's free and sure it's fun. Even
beginners are invited to join; you have nothing to lose, you can improve
your redcoding, comparing your warriors with those of more expert players,
and, seen that some rounds will have problems never met before (white
warrior, team play, normal programs in redcode), may also be that a new
player will beat some veteran in those unknown fields of redcoding.
To subscribe, it's possible even in the middle of tournament, mail Stefan
Strack <stst@idnsun.gpct.vanderbilt.edu>

Now, in short, the results:

Name       one-on-one   multi        combined
_____________________________________________
P.Kline		    5	   10		7.5
Paulsson	    7	    8		7.5
Beppe Bezzi	    8	    6		7
M R Bremer	   10	    4		7
Maurizio Vittuari   6       7		6.5
Anders Ivner	    9	    2		5.5
Steven Morrell	    1	    9		5
John K. Wilkinson   3	    5		4
Derek Ross	    4	    3		3.5
G. Eadon	    2	    1		1.5


Here the results of the one-on-one challenge:

Rank    Name                    Author                   %W  %L  %T   Score
___________________________________________________________________________
  1     endpoint .              M R Bremer               40  28  32   1678 
  2     Leprechaun on speed     Anders Ivner             43  38  18   1631 
  3     Rhino                   Beppe Bezzi              37  31  32   1566 
  4     aMixture                Paulsson                 36  33  31   1520 
  5     Tom&Jerry               Maurizio Vittuari        31  31  38   1430 
  6     Die Hard                P.Kline                  17   7  76   1410 
  7     Miss Careless           Derek Ross               32  38  30   1391 
  8     Cthulhu v8              John K. Wilkinson        21  19  60   1352 
  9     Mythicon v1.2           G. Eadon                 29  46  25   1242 
 10     Try fitting THIS name i Steven Morrell           25  41  34   1208 

The results for 1000 rounds of "all-against-all":
_____________________________________________
Die Hard by P.Kline scores 14162
  Results: 0 16 26 42 86 168 179 228 137 49 69
Try fitting THIS name into eight characters or less! by Steven Morrell
scores 13308
  Results: 0 2 25 41 89 157 182 227 135 49 93
aMixture by Paulsson scores 12656
  Results: 1 8 6 31 82 157 177 230 134 49 125
Tom&Jerry by Maurizio Vittuari scores 12382
  Results: 0 2 10 24 80 163 179 233 137 49 123
Rhino by Beppe Bezzi scores 10987
  Results: 0 0 5 22 56 144 167 220 137 49 200
Cthulhu v8 by John K. Wilkinson scores 8590
  Results: 1 2 12 18 28 83 120 185 124 49 378
endpoint . by M R Bremer scores 8425
  Results: 0 8 12 17 26 77 119 173 120 49 399
Miss Careless by Derek Ross scores 6494
  Results: 1 0 13 6 23 47 79 149 118 49 515
Leprechaun on speed by Anders Ivner scores 4992
  Results: 4 11 4 2 8 17 47 110 94 49 654
Mythicon v1.2 by G. Eadon scores 4581
  Results: 1 1 1 9 12 25 46 117 97 49 642


Waiting results I submitted second round White warrior to Pizza; he
performed very well, here are results:

Date: Mon, 16 Oct 1995 07:08:22 -0700
From: Internet Pizza Server <pizza@ecst.csuchico.edu>
To: bezzi@iol.it
Subject: 94 : White warrior challenge results

Program "White warrior" (length 17) by "Nandor & Stefan"
(contact address "bezzi@iol.it"):
has challenged the ICWS '94 Draft hill.

White warrior wins: 19
Phq wins: 28
Ties: 203

White warrior wins: 102
Leprechaun on speed wins: 81
Ties: 67

White warrior wins: 4
Jack in the box wins: 2
Ties: 244

White warrior wins: 15
Father & Son wins: 30
Ties: 205

White warrior wins: 51
Brain Vamp wins: 25
Ties: 174

White warrior wins: 91
Thermite 1.0 wins: 61
Ties: 98

White warrior wins: 51
Torch t18 wins: 93
Ties: 106

White warrior wins: 47
Frontwards wins: 137
Ties: 66

White warrior wins: 135
SandBlast 1a wins: 45
Ties: 70

White warrior wins: 76
Armory - A5 wins: 93
Ties: 81

White warrior wins: 87
myVamp v3.7 wins: 93
Ties: 70

White warrior wins: 126
Leprechaun deluxe wins: 71
Ties: 53

White warrior wins: 84
Anti Die-Hard Bevo (3c) wins: 102
Ties: 64

White warrior wins: 89
Firestorm 08 wins: 90
Ties: 71

White warrior wins: 105
Cthulhu v7 wins: 42
Ties: 103

White warrior wins: 88
Tornado 1.8 wins: 74
Ties: 88

White warrior wins: 19
Twimpede wins: 2
Ties: 229

White warrior wins: 188
Web wins: 30
Ties: 32

White warrior wins: 0
simple wins: 2
Ties: 248

White warrior wins: 5
Die Hard wins: 8
Ties: 237

Program "White warrior" (length 17) by "Nandor & Stefan"
;strategy White warrior for round 2 of Nandor and Stefan's fall 1995 tournament
;strategy Out of senseless cruelty, we'll show the load file format only :-)
;strategy Results will be published in the newsletter -Beppe
White warrior wins: 9
Ties: 233

Your overall score: 131.714286

Die Hard has been pushed off the ICWS '94 Draft hill.
The current ICWS '94 Draft hill:

 6  26/ 21/ 52             White warrior      Nandor & Stefan     132       1

Not bad for something we have to beat 80% of times.

Nandor, Stefan, you are not more out of warriors in Pizza hill :-)

---------------------------
The hint

Replicators (part 1)

Having to make the hint of the week, I start with the kind of warriors I
like more and I can do better, replicators, or paper; the sort of warrior
that use the sheer number to overcome the enemy.
Paper warriors, like every other, have evoluted a lot from the beginnings of
the game; presently they use almost all the so called 'silk' style, i.e.
splitting before copying. This can be done only under 94 rules because
requires post increment and a-field addressing. Now let's give a look at a
very simple guy.


start   spl     1
        mov     -1,     0       ;generate 3 parallel processes

1 silk  spl.a   @0,     100     ;split
2       mov.i   }silk,  >silk   ;copy
3       jmp.a   silk,   {silk   ;repeat the thing resetting pointer

First two lines generate 3 processes that execute the same line one after
the other, before executing the next. First line creates another process to
execute line start+1, then process 1 copy start line over the mov and
process two splits, adding another process to execute silk. The simpler way
to generate an exact number of parallel processes is converting the number
required in binary 3 -> 11, subtract one -> 10, use a spl 1 for every one
and a mov -1,0 for every zero. Much simpler to do than to tell. For the
warrior to work we need at least as many processes as we have lines to copy.
Let's go back toour warrior; now we have three processes executing line 1
they split, where, at the a-field address i.e. the address pointed by
b-field of line 0 locations away, the b-field of the line they are
executing, 100 locations away. When all three process executed this line we
have three others process ready to execute line silk+100, there is nothing
to execute here but we have some time because new generated processes are
queued after those executing the split.
First three processes now execute line 2, they move what's pointed by
a-field of line 1 to the location pointed by b-field of line 1 then they
increment both a and b field of line 1. First process moves line 1 100 cells
away from line 1 and leaves line 1 changed such a way:
1 silk  spl.a    @1,    101
so it copyes line 2 101 cells away from silk, just after the previous line.
Process 3 does same thing copying line3.
Now it's the turn of the new processes, those created by line1, to execute,
they are not more sitting on an empty cell but over the copy of line1
created by line2, they execute it and begin creating third generation copy.
First three processes now reach line3, now the warrior has modifyed in such way

1 silk  spl.a   @3,     102
2       mov.i   }silk,  >silk
3       jmp.a   silk,   {silk
The a-field of line 3 is the address of the jump while b-field decrements
a-field of line 1 so that the warrior can go on splitting and copying.

This one is not a real warrior, his offensive potential is too small, it's
just to understand how a silk replicator works. Simple improvements are
adding an add line so as copies are not packed one near the other, and
adding some bombing to make it a bit nastier. The warrior following is
Paperone, my first warrior to enter 94 hill, it was on top of beginner hill
for some time a few months ago.
It's similar to the example in the FAQ (very similar indeed :-) but to make
it run well I had to work on the many constants.

;redcode-94
;name Paperone
;author Beppe Bezzi
;strategy Silk replicator
;kill Paperone
;assert CORESIZE == 8000

start   spl     1,      <300    ;\
        spl     1,      <150    ;  generate 7 consecutive processes
        mov     -1,     0       ;/

silk    spl     3620,   #0      ;split to new copy
        mov.i   >-1,    }-1     ;copy self to new location

;this is another way to copy using multiple processes, the other one is a
bit better because we can decrement the cell we are splitting to and, if we
are lucky, kill an imp.

        mov.i   bomb,   >2005   ;linear bombing
        mov.i   bomb,   }2042   ;A-indirect bombing for anti-vamp
;The first bomb laid down acts as a pointer for the following stream, laying
down a carpet.

        add.a   #50,     silk    ;distance new copy   
        jmp     silk,   <silk   ;reset source pointer, make new copy
bomb    dat.f   >2667,  >5334   ;anti-imp bomb

This is very effective against 3 points imp rings. A lucky hit on the
executing process can kill many others; other kinds of bombs are used, by me
at least, we'll discuss them another time.

Another time we'll discuss more advanced questions: another replicating
engine, that is better than this one, and some other paper related topics
like spread constants, bombs, strategies...

For questions mail me <bezzi@iol.it> or if you think it's of general
interest post to rec.games.corewar

Anyone with hints or warriors to publish is welcome.

2002-2005 corewar.info. Logo C. Schmidt