Answers.Body: <p>No, they don't, because it wouldn't be fair. According to <a href="https://en.wikipedia.org/wiki/Computer_chess#Computers_versus_humans" rel="nofollow">Wikipedia</a>:</p>
  
  <blockquote>
    <p>A recent top chess engine, Rybka, has an estimated Elo rating of about 3200 (when running on an up-to-date PC, as computed by SSDF).</p>
  </blockquote>
  
  <p>This is about 500-600 points higher than an average grandmaster (rating 2600-2700). This would be the same rating difference as between a grandmaster and a top club player (2000-2200) - it is a totally different playing category.</p>
  
  <p>According to how the ELO rating is set up, the <a href="https://en.wikipedia.org/wiki/Elo_rating_system#Mathematical_details" rel="nofollow">expected score</a> of a 2600 grandmaster vs. a 3200 computer is 3% - i.e. when they play 100 games, the grandmaster is expected to draw only 6 games. This is way too low to be interesting.</p>
  
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Answers.Body: <p>This used to be the case from the sixties, when the <a href="https://en.wikipedia.org/wiki/Mac_Hack" rel="nofollow">first chess computers</a> entered the scene, with the playing strength of a beginner, until the nineties, when <a href="https://en.wikipedia.org/wiki/Deep_Thought_(chess_computer)" rel="nofollow">computers</a> became too strong for the normal grandmasters. </p>
  
  <p>Then followed a phase of man-machine matches until maybe 10 years ago when results like <a href="https://en.wikipedia.org/wiki/Hydra_(chess)" rel="nofollow">Hydra-Adams</a>, 5.5-0.5, made it abundantly clear that even the strongest human chess players cannot compete with chess computers. </p>
  
  <p>Nowadays even engines on unspecialised and relatively modest hardware (like a smartphone) are playing beyond human capabilities. </p>
  
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Answers.UserDisplayName: BlindKungFuMaster
Answers.Body: <p>Nowadays, human vs. computer matches or tournaments where a computer participates among human players don't exist because the difference in strength became too big.</p>
  
  <p>In the past, the situation was different and a couple of matches were organized. The match Kasparov - Deep Blue in 1997 is of course the most famous one. On this <a href="https://en.wikipedia.org/wiki/Human%E2%80%93computer_chess_matches" rel="nofollow">wikipedia page</a> you can find a nice overview of the human vs. computer matches.</p>
  
  <p>"Mixed tournaments" (humans and computers) were a lot rarer. The only one I can remember is the <a href="http://www.365chess.com/tournaments/NED-ch_2000/5890" rel="nofollow">Dutch championship in 2000</a>, where Fritz participated. It shared the 3rd place with 7/11 and a performance around 2600.</p>
  
  <p>However, it should be added that GM Van der Sterren and IM Bosboom resigned after move 1 and 4 respectively, as a sign of protest against the participation of the machine. So, discarding these games, Fritz scored 5/9, with a performance of 2500+ (my estimation, I didn't check it).</p>
  
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Answers.UserDisplayName: Maxwell86
Body: <p>Do computers play in ordinary human grandmaster chess tournaments with time limits at 40 moves in two hours etc? If so how do they fare?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2015-08-06T10:46:13.090Z
Comments.Text: No. This idea was popular like 10 years ago, but it's pointless now because computers can beat any grandmaster easily. It's like Usalt Bolt against a full-speed racing car.
Comments.UserDisplayName: SmallChess
Tags: <engines><computer-chess><human-versus-machine>
Title: Chess computers in human tournaments
ThreadText: # Chess computers in human tournaments
  
  (Asked by: username_0 on 2015-08-06)
  
  Do computers play in ordinary human grandmaster chess tournaments with time limits at 40 moves in two hours etc? If so how do they fare?
  
  **Tags:** engines, computer-chess, human-versus-machine
  
  > **Comments:**
  > **username_1**: No. This idea was popular like 10 years ago, but it's pointless now because computers can beat any grandmaster easily. It's like Usalt Bolt against a full-speed racing car.  
  
  ---
  
  ## 3 answers
  
  ### Answer by username_2 on 2015-08-06. Score: 1
  
  No, they don't, because it wouldn't be fair. According to [Wikipedia](https://en.wikipedia.org/wiki/Computer_chess#Computers_versus_humans):
  
  > A recent top chess engine, Rybka, has an estimated Elo rating of about 3200 (when running on an up-to-date PC, as computed by SSDF).
  
  This is about 500-600 points higher than an average grandmaster (rating 2600-2700). This would be the same rating difference as between a grandmaster and a top club player (2000-2200) - it is a totally different playing category.
  
  According to how the ELO rating is set up, the [expected score](https://en.wikipedia.org/wiki/Elo_rating_system#Mathematical_details) of a 2600 grandmaster vs. a 3200 computer is 3% - i.e. when they play 100 games, the grandmaster is expected to draw only 6 games. This is way too low to be interesting.
  
  
  ---
  
  ### Answer by username_3 on 2015-08-06. Score: 0
  
  This used to be the case from the sixties, when the [first chess computers](https://en.wikipedia.org/wiki/Mac_Hack) entered the scene, with the playing strength of a beginner, until the nineties, when [computers](https://en.wikipedia.org/wiki/Deep_Thought_(chess_computer)) became too strong for the normal grandmasters.
  
  Then followed a phase of man-machine matches until maybe 10 years ago when results like [Hydra-Adams](https://en.wikipedia.org/wiki/Hydra_(chess)), 5.5-0.5, made it abundantly clear that even the strongest human chess players cannot compete with chess computers.
  
  Nowadays even engines on unspecialised and relatively modest hardware (like a smartphone) are playing beyond human capabilities.
  
  
  ---
  
  ### Answer by username_4 on 2015-08-06. Score: 0
  
  Nowadays, human vs. computer matches or tournaments where a computer participates among human players don't exist because the difference in strength became too big.
  
  In the past, the situation was different and a couple of matches were organized. The match Kasparov - Deep Blue in 1997 is of course the most famous one. On this [wikipedia page](https://en.wikipedia.org/wiki/Human%E2%80%93computer_chess_matches) you can find a nice overview of the human vs. computer matches.
  
  "Mixed tournaments" (humans and computers) were a lot rarer. The only one I can remember is the [Dutch championship in 2000](http://www.365chess.com/tournaments/NED-ch_2000/5890), where Fritz participated. It shared the 3rd place with 7/11 and a performance around 2600.
  
  However, it should be added that GM Van der Sterren and IM Bosboom resigned after move 1 and 4 respectively, as a sign of protest against the participation of the machine. So, discarding these games, Fritz scored 5/9, with a performance of 2500+ (my estimation, I didn't check it).
  
  
  ---
  
  