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Critter (Computer)
Number of games in database: 25
Years covered: 2013 to 2014
Overall record: +6 -15 =4 (32.0%)*
   * Overall winning percentage = (wins+draws/2) / total games.

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A10 English (2 games)
B40 Sicilian (2 games)

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[what is this?]
Its author is Richard Vida.

References: (1)

 page 1 of 1; games 1-25 of 25  PGN Download
Game  ResultMoves YearEvent/LocaleOpening
1. Rybka vs Critter 1-0642013nTCEC - Stage 2aB50 Sicilian
2. Critter vs Houdini 1-0792013nTCEC - Stage 2aE44 Nimzo-Indian, Fischer Variation, 5.Ne2
3. Stockfish vs Critter  ½-½672013nTCEC - Stage 2aA10 English
4. Critter vs Stockfish ½-½562013nTCEC - Stage 2aA10 English
5. Tornado vs Critter 0-1362013nTCEC - Stage 2 - Season 2E60 King's Indian Defense
6. Komodo vs Critter 1-01442013nTCEC - Stage 2 - Season 2C12 French, McCutcheon
7. Critter vs Spark  1-0472013nTCEC - Stage 2 - Season 2C42 Petrov Defense
8. HIARCS vs Critter  ½-½1202013nTCEC - Stage 3 - Season 2E32 Nimzo-Indian, Classical
9. Critter vs Naum  1-0352014TCEC - Season 6 - Stage 2C04 French, Tarrasch, Guimard Main line
10. Critter vs Stockfish  0-1612014TCEC - Season 6 - Stage 2B47 Sicilian, Taimanov (Bastrikov) Variation
11. Critter vs Shredder 1-0312014TCEC - Season 6 - Stage 3B80 Sicilian, Scheveningen
12. Critter vs Stockfish  0-1502014TCEC - Season 6 - Stage 4B06 Robatsch
13. Houdini vs Critter  1-0592014TCEC - Season 6 - Stage 4C18 French, Winawer
14. Critter vs Stockfish  0-1662014TCEC - Season 6 - Stage 4B40 Sicilian
15. Komodo vs Critter 1-0722014TCEC - Season 6 - Stage 4A70 Benoni, Classical with 7.Nf3
16. Houdini vs Critter  1-0832014TCEC - Season 6 - Stage 4E10 Queen's Pawn Game
17. Stockfish vs Critter  1-0692014TCEC - Season 6 - Stage 4B40 Sicilian
18. Komodo vs Critter 1-0462014TCEC - Season 6 - Stage 4C49 Four Knights
19. Houdini vs Critter  1-0922014TCEC - Season 6 - Stage 4B75 Sicilian, Dragon, Yugoslav Attack
20. Stockfish vs Critter 1-0642014TCEC - Season 6 - Stage 4D17 Queen's Gambit Declined Slav
21. Critter vs Komodo  0-1822014TCEC - Season 6 - Stage 4E73 King's Indian
22. Critter vs Stockfish  0-1422014TCEC - Season 6 - Stage 4E04 Catalan, Open, 5.Nf3
23. Komodo vs Critter 1-0542014TCEC - Season 6 - Stage 4E12 Queen's Indian
24. Komodo vs Critter ½-½492014TCEC - Season 6 - Stage 4A52 Budapest Gambit
25. Arasan vs Critter 0-1382014TCEC - Season 7 - Stage 1aA34 English, Symmetrical
 page 1 of 1; games 1-25 of 25  PGN Download
  REFINE SEARCH:   White wins (1-0) | Black wins (0-1) | Draws (1/2-1/2) | Critter wins | Critter loses  

Kibitzer's Corner
Premium Chessgames Member
  offramp: Rather a neat game from the very latest TCEC. I haven't sent in the PGN to as I am sure all the games will appear soon.

[Event "TCEC Season 7 - Stage 1a"]
[Site ""]
[Date "2014.09.23"]
[Round "4"]
[White "Arasan 17.3"]
[Black "Critter 1.6a"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2525"]
[BlackElo "3030"]
[PlyCount "76"]
[EventDate "2014.09.19"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nxc3 6. bxc3 g6 7. Bg2 Bg7 8. O-O O-O 9. Qa4 Qb6 10. Qh4 Nc6 11. a4 Bd7 12. Ba3 Qa5 13. Rfb1 b6 14. Bb2 Rad8 15. Qf4 e5 16. Qc4 Be6 17. Qh4 h6 18. d3 Rfe8 19. Nd2 Nd4 20. cxd4 Qxd2 21. dxc5 bxc5 22. Bc6 c4 23. Bxe8 Rxe8 24. Qe4 c3 25. Ba3 Bf5 26. Qd5 c2 27. Re1 e4 28. Qb5 Re6 29. Bb4 e3 30. Bxd2 exd2 31. Qb4 Rxe2 32. Rxe2 d1=Q+ 33. Rxd1 cxd1=Q+ 34. Re1 Qxd3 35. Qb8+ Kh7 36. Qxa7 Qd5 37. Qe3 Bc3 38. g4 Bxe1 0-1


click for larger view

Black now plays 22...c4

The c-pawn carries on its journey:

click for larger view

27...e4: the black e-pawn also rushes forward.

click for larger view

After 29.Bb4, attacking the queen,

click for larger view



click for larger view

Quite a position!

31...♖e6xe2 more or less finishes the game.

click for larger view

Premium Chessgames Member
  tamar: Shades of Bogoljubov vs Alekhine, 1922

BTW Arasan crashed after 38...Bxe1 and was ruled resigned. A real TKO!

Aug-07-16  zanzibar: I only recently discovered a new fact about Critter.

Normally, I've previously mostly run it from inside a GUI like <SCID>, etc.

Of course you can run it from the command line as well (which I had done, very quickly, just one or two times before). Like this, on windows:

<cmd> C:\Bin\Chess\Engines\Critter\Critter_1.6a_32bit.- exe>

So, if you do such an unimaginable thing, you'll have to familiarize yourself with a lot of UCI commands in order to do anything useful: (canonical) (canonical online) (wiki) (stockfish basic vanilla)

One might think that the UCI protocol might be improved or extended, but no, I've yet to find any engine doing so.

E.g. one might like to query the engine as to what it's current set of options are. Nope. It seems that only the default/min/max values get returned.

And one might also expect the engine could be queried as to what the FEN it was most recently analyzing.

Nope - with one known exception - Critter.

I found this quite by accident. Just hit <CR> (or <Enter> or whatever you call it), with nothing else.

Critter will not only echo back the current FEN string, it will also display a very readable ASCII (or ANSI) picture of the current position.

It's so nice that I spent more time than I care to admit learning how to duplicate the highlighting of the White pieces.

Thanks Mr. Vida, once more.

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