Members · Prefs · Laboratory · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing
Robert James Fischer vs Mac Hack VI (Computer)
"Man vs. Machine, 1977" (game of the day Oct-24-2018)
Computer Match (1977), Cambridge, MA USA
King's Gambit: Accepted. Bishop's Gambit Bledow Countergambit (C33)  ·  1-0



Click Here to play Guess-the-Move
Given 64 times; par: 34 [what's this?]

explore this opening
find similar games 2 more Fischer/Mac Hack VI games
PGN: download | view | print Help: general | java-troubleshooting

TIP: Some games have photographs. These are denoted in the game list with the icon.

PGN Viewer:  What is this?
For help with this chess viewer, please see the Olga Chess Viewer Quickstart Guide.


Kibitzer's Corner
< Earlier Kibitzing  · PAGE 6 OF 6 ·  Later Kibitzing>
Premium Chessgames Member
  Sally Simpson: Hi AylerKupp,

I think he is talking about Greenblatt who after this game went onto claim that Humans had fixed World Chess.

Premium Chessgames Member
  Diademas: Could be a Monday puzzle.

20...? Black to find the only move that allows mate in one.

Oct-14-18  AlicesKnight: <MissScarlett, Keypusher et al> I still have my Chess Challenger, in working order. From those distant days.... I regard it with some affection. It was handy when multi-tasking on some long, complicated and uninteresting work-at-home stuff - to glance at the CC for a few seconds and make a response was light relief when on about level 5 or 6 (not 1 or 2 when I agree it played help-mate at times). <MissScarlett> Thanks for the Youtube clip; my version came in a smart plastic briefcase, and has the correct algebraic marking, so perhaps I have a 'second edition'. The little lights on the display flick slowly back and forth as if to say "I'm alive and thinking....", unlike some silicon - cute.....
Premium Chessgames Member
  AylerKupp: <<Sally Simpson> I think he is talking about Greenblatt who after this game went onto claim that Humans had fixed World Chess.>

You're probably right, I don't know how I could have missed that. Thanks for setting me straight!

And I also missed that in the past he had referred to Fischer as "the computer". Thirty lashes with a wet tablebase!

Premium Chessgames Member
  harrylime: <AylerKupp: <<harrylime> The awful sad thing about this game is not the computer ... it's that we are staring at arguably the greatest Chess Player ever in his prime.>

WHAT !!! Did you actually used the phrase "<arguably> the greatest Chess Player ever <in his prime>." ????? Are you feeling all right? Or are you mellowing in your old age? Please don't.>

Ok I maybe had some kinda fainting fit there ! lol lol

RJF IS the Greatest and this game is pretty historic.

Premium Chessgames Member
  diceman: <Sally Simpson: Hi AylerKupp,

I think he is talking about Greenblatt who after this game went onto claim that Humans had fixed World Chess.>

1. Russians fix chess
2. Humans fix chess
3. Humans own computers
4. Humans fix computers
5. Computers own humans

Oct-24-18  sfm: 19.Rc1! At first glance I thought Fischer was joking, caring about an unimportant pawn - but with this move the queen is in severe trouble,and will soon be unable to defend h7 (or h6, as it came).
Oct-24-18  Whitehat1963: Crushing! But wouldn’t most grandmasters have found these moves?
Oct-24-18  Violin sonata: Bobby Fischer played a king's gambit, before this he often playing against it, even he had made a defense in the King's gambit. I'm sure he did it now as an exception, I think Bobby Fischer can be a strong king's gambit player with the positional sense.

I like white position after the move 10.Nxg5, I think it gains the initiative and tempo for white and this is proven after 14.Bxf4 Qg7 15.Nf6+ black position has been pressed. Well played by Fischer.

May-22-19  The Boomerang: Greenblatt? :)

Kasparov beat the much stronger, Deep Thought. Deep Blue 1996, took rounds off Deep Blue 1997 and Deep Junior 2003.

Jul-13-19  Chesgambit: Cambridge 1977 no reated
maybe Greenblatt elo 2100
Premium Chessgames Member
  AylerKupp: <Chesgambit> Cambridge 1977 no reated . maybe Greenblatt elo 2100>

The Greenblatt program (actually MacHack VI) was definitely rated. In fact, according to Greenblatt (Computer), It was the first program to play in a tournament against humans and achieved a chess rating, 1243 in 1966. It played under the pseudonym "Robert Q". And according to it achieved a rating of 1400 in Feb. 1967. A paper published in 1969 ( indicates that its rating was advancing quickly, reaching 1450 in Apr 1967.

It was also the first program to draw and then win a game against a human player in tournament play (

In 1966 MacHack VI was running on a PDP-6 computer, but in the early 1970s it was rehosted to run on a PDP-10, a much faster computer (~ 500K ops vs. the PDP=6's 200K ops) with much more memory (the PDP-6 Greenblatt used had only <16K> words of memory for both program and data, although it could support 32K). So I suspect that the version that played Fischer in 1977 was a lot stronger than the version that played in that tournament in 1966/1967. Which probably isn't saying much.

May-01-20  wordfunph: simply a mismatch..
Premium Chessgames Member
  HeMateMe: one of the MIT Greenblatt programmers would have given Bob a stronger game.
Nov-13-21  newzild: It says something about Fischer that he chose to mate with the queen rather than the bishop.

In one of his other Greenblatt games, he could have underpromoted to a bishop and mated just as quickly:

Greenblatt vs Fischer, 1977

Premium Chessgames Member
  Joshka: <newzild> So you would have used your bishop to mate? What's the difference?
Nov-17-21  newzild: <Joshka> Some players would mate with the bishop just to be cute.
Nov-18-21  Granny O Doul: It shows that Fischer felt the state should take precedence over the church.
Premium Chessgames Member
  PawnSac: < Granny O Doul: It shows that Fischer felt the state should take precedence over the church. >

The royal lady just wanted to look into her enemy's eyes as she put the knife to his royal throat!

What do the Klingons say? "Revenge is a dish best served cold" ?

Seriously tho.. Fischer undoubtedly saw it both ways.. just thought it was prettier with the Q maybe.

As for the state vs the "church", around this time wasn't he was still entangled in Herbert Armstrong's Worldwide Church of God.. and his heretical teachings? My guess is that's where he started with the antisemitism nonsense. I remember rumors he gave a large percentage of his WWC winnings to Armstrong, only to be disappointed. But who knows any more what was really true.

Premium Chessgames Member
  HeMateMe: Why would Fischer have demanded white against some crappy computer program? None of the great players was as insecure as fischer.
Mar-31-23  alshatranji: "HeMateMe: Why would Fischer have demanded white against some crappy computer program?" He didn't. The database has two other games which Fischer played with black and won. The forth game of the match was not played because it was obviously unnecessary.
Mar-31-23  Dionysius1: 19.Rc1 looks weird - whats wrong with 19.c3 even if 19...Qc2? Maybe it's an example of RJF's dislike of allowing even a hint of counterplay?
Premium Chessgames Member
  Aminda: 19…. Kg7 is a move of a very early beginner. But there are others like that one in this game. I wonder why Fischer played such a weak computer program in 1977. What did it bring him?
Premium Chessgames Member
  MissScarlett: <The forth game of the match was not played because it was obviously unnecessary.>

Fischer wrote: <I recently played some games on a terminal with the Greenblatt program. Enclosed are three of them.> The implication being that he played more.

<I wonder why Fischer played such a weak computer program in 1977. What did it bring him?>

In 1977, it was a strong program. The likeliest answer is that he developed an interest in computer chess. But I wouldn't rule out of the possibility that he also was well-paid.

Premium Chessgames Member
  Aminda: MissScarlett, you are quite right in pointing that for 1977, it must have been a “strong” program. I remember playing several games on a PDP-11 around that time. It must have been even weaker. But my point was that obviously Fischer must have seen right away that he was playing against a “patzer”. Why would he bother? For money? For publicity (for his book)? Just wondering.
Jump to page #    (enter # from 1 to 6)
search thread:   
< Earlier Kibitzing  · PAGE 6 OF 6 ·  Later Kibitzing>

NOTE: Create an account today to post replies and access other powerful features which are available only to registered users. Becoming a member is free, anonymous, and takes less than 1 minute! If you already have a username, then simply login login under your username now to join the discussion.

Please observe our posting guidelines:

  1. No obscene, racist, sexist, or profane language.
  2. No spamming, advertising, duplicate, or gibberish posts.
  3. No vitriolic or systematic personal attacks against other members.
  4. Nothing in violation of United States law.
  5. No cyberstalking or malicious posting of negative or private information (doxing/doxxing) of members.
  6. No trolling.
  7. The use of "sock puppet" accounts to circumvent disciplinary action taken by moderators, create a false impression of consensus or support, or stage conversations, is prohibited.
  8. Do not degrade Chessgames or any of it's staff/volunteers.

Please try to maintain a semblance of civility at all times.

Blow the Whistle

See something that violates our rules? Blow the whistle and inform a moderator.

NOTE: Please keep all discussion on-topic. This forum is for this specific game only. To discuss chess or this site in general, visit the Kibitzer's Café.

Messages posted by Chessgames members do not necessarily represent the views of, its employees, or sponsors.
All moderator actions taken are ultimately at the sole discretion of the administration.

This game is type: CLASSICAL. Please report incorrect or missing information by submitting a correction slip to help us improve the quality of our content.

<This page contains Editor Notes. Click here to read them.>

Featured in the Following Game Collections[what is this?]
Fischer finishes off "Greenblatt" with a truly unusual mate
from Picturesque Positions by Benjamin Lau
Nice game
from "x" vs computer by S4NKT
early computer games
by aragorn69
Fischer & the beast
from Check mate I by popski
Fischer shows up at MIT in 1977 to play THIS game?!?
from Weirdest. Games. Ever. by Calchexas
Single-handedly the worst computer I have ever seen
from MorphysGhost's favorite games by MorphysGhost
from Computer - GM games 1963-2002 by biglo
Fischer vs computer-(it wasn't pretty!)-ok the mate was
from Fischer greats by kevin86
A grade 12 beating up a grade 8 student!
from Computer evolution by sibilare
Bonita Combinacion de Fischer
from Juegos Bonitos by binshkeerfortt
April 8: Greenblatt with Envy
from Game of the Day 2007 by Phony Benoni
from keno23's favorite games by keno23
Wow Nxg5!!!
from Unbelievable chess games by Sam the sacrificer
fm avari viraf's favorite games
by fm avari viraf
Computer destroyed by Fischer
from Ghizza's favorite games by Ghizza
computer on the Fritz
from chess strategems vi - under construction by gauer
from viv001's favorite games by viv001
El intemporal Genio del Maestro R.J. Fischer
from Mis favoritos by juan31
Bobby makes the Green go Brown in 21 moves.
from Great Minds vs Complex Wires... by argishti
Greenblatt with envy
from Shankar's favorite games by GSankarN
plus 75 more collections (not shown)

Home | About | Login | Logout | F.A.Q. | Profile | Preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | New Kibitzing | Chessforums | Tournament Index | Player Directory | Notable Games | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | Privacy Notice | Contact Us

Copyright 2001-2023, Chessgames Services LLC