Fun flash game - Chat Noir

Picture 3-31 The object of this simple game is to click on the light colored dots to create a barrier that prevents the kitty from getting away. Each time you click on a dot, the kitty gets to move from one dot to another.

Link (Via Neatorama)


  1. OMG this game destroyed hours of my life last month. The frustration is oddly compelling. My wife and I would sit in silence in our living room, laptops open, and experience long stretches of silence broken by occasional “Damn you, cat!” exclamations as the filthy beast made its escape… again.

    The same game company makes a simple Risk-like flash game called Dice Wars that is a regular progress bar eater for me.

  2. Reminds me of “Hunt the Wumpus”. Of course, in that game, the Wumpus isn’t trying to escape, he’s trying to eat you.

  3. This came listed as a recent “Web Zen” on BB and I’ve been obsessed with it ever since. I wish there was a better payoff, is all.

  4. I wasted some time with this last month as well ;-) Tips: Start as far away from the cat as possible, and create a wall leaving one opening until the cat is one dot away, then seal his fate. It’s a win almost every time!

  5. Tip: The Flash version is OK, but the real-life version (marketed in the U.S. as “Get Your Kitty Into the Carrier to Take Him To The Vet For His Weekly Glucose Reading”) is much, much more challenging, and the graphics are better.

  6. @sidhebaap: Thanks ! The first thing I thought of (after getting to the point of a near-guaranteed win) was “Is it always possible to catch the cat ? Can the cat always escape ? How many dots need to be removed initially for that to happen ?” But yeah, Conway has done way too much fun stuff =) Thanks for the link !

  7. If you really like this game, I would also suggest learning to play Go (weiqi). The game reminds me of life and death situations and other certain traps in that classic game.

  8. Figured it out after a few minutes. The trick is to herd the cat–possible, despite the cliché. Click far away from it but in the direction it’s going and create channels it’ll head for, them close them off.

  9. Virgil @16 has made the same connection I immediately made. This is remarkably like the early, strategic-phase, part of a game of Go.

    Fun, but very easy once you make the connection.


  10. I don’t think it’s possible to win every game. I have just tried several games and won about half of them; one of them started out with just four dark dots, which were all pretty much in one corner. AFAICT, the cat always heads for the shortest path out, and if you can predict that path, you can exploit that. But I doubt that there always is a way to win; I guess the programmer just fooled around with the random play-field generation until she/he was able to win most of the games, and left it at that. Of course, if it really is like that, the game is very unfair and poorly designed; therefore I’m quite interested in the question whether there might be a strategy that always wins, after all. Maybe a bb reader with too much spare time can figure that out? ;-)

  11. @Larsbars (#23): The cat can move one field per turn, so in the terminology of the interesting paper you linked to, it would be a 1-angel, whereas the player would be called the devil. The paper does mention that the devil has a winning strategy (for those who don’t know: this means a strategy that will always always make you win, for all possible starting conditions and opponents) against the 1-angel, but only on boards bigger than 35×35. This finding doesn’t apply to Chat Noir, as the Chat Noir board is siginificantly smaller, and it isn’t made up of square tiles, but hex tiles instead. In fact, the paper doesn’t mention hexagonal connectivity at all, so it’s quite beside the point.

    Even if you had a theory that addressed exactly the board layout and rules of Chat Noir, you wouldn’t need a winning strategy for these conditions! It is easier: as you always play against a CPU opponent with a fixed AI algorithm, all you need is a winning strategy against that one AI. So, does one exist? I don’t think so, but I can’t quite prove that position.

  12. Gosh, I should really read more carefully. On page 17 Bowditch answers my QI question. I’ll stop now.

  13. After playing for a while, and now losing rarely,
    seemingly only after making a mistake, I suspect
    but can’t yet prove that all presented games
    are winnable. That is, on a board of this
    particular size, if you are given at least
    four squares at some minimum x distance from
    the center that you can win every time, which
    is what I’m guessing the algorithm gives you.
    My method (roughly) is to imagine the largest
    perimeter that can be efficiently constructed
    that includes all outlying given squares, and
    then halve the largest gap in that perimeter
    with my first move. Whatever remaining gap the
    cat moves towards on its first move, I then
    halve that gap with my next move. And so on.
    If flawlessly played, this appears to always
    give you the one-step-ahead you need to win.
    I wish of course I could select the four-squares-
    given-at-the-start games, and replay them if
    I lost, to inductively “confirm” my suspicion.
    A deductive proof is beyond my abilities.

  14. Oh! I had missed the QI part myself.

    Primitif’s approach looks promising. The answer to the question of which Chat Noir starting conditions lead to a winnable game could actually be brute forced quite easily, as the playing field is small enough. In theory, this would lie within my abilities, but … I don’t think I’ll feel like doing such a boring programming excercise anytime soon ;-/

    However, I don’t think it’s likely that you can win every game. We know for sure that it would be impossible if there were no pre-darkened spots, and just now I had to start out with just three dark spots, all in one corner, separated only by gaps one spot wide. This situation is pretty much hopeless; however you’d have a chance if there’s some flaw in the cat’s pathfinding algorithm and you knew how to exploit it. *shrugs*

  15. Nex,

    1) I just won my first 3-spot game (out of
    about ten played), although the given spots
    weren’t all in one corner.

    2) Out of the 2000 or so opening positions I’ve
    viewed so far, in addition to the ten 3-spots,
    there have been two 2-spots. I didn’t come
    close to winning either of the 2-spots.

    3) Nonetheless, my guess is still that all
    presented positions are winnable, if, as you
    I think correctly guessed, one sufficiently
    understands the cat’s peculiar logic.

    That’s my hope anyway. If I’m right, then
    Chat Noir is a wonderful game that will live
    forever. If I’m wrong, and there are indeed
    unwinnable positions (which is what everybody
    else besides me on the internets is guessing),
    then it’s just an evil piece of time-wasting
    shit. Still fun though.

  16. My thoughts precisely … considering that this is suppsed to be a fun time-waster, it may be a bit peculiar to think about the game in this way, but at least I’m not alone :-)

  17. Some more info for Nex and anybody else who might
    be following along (and it’s a shame if nobody
    else is, because this is a way-above-average
    detective tale):

    1) I have won three of the four 3-spot games
    that have showed up since my last report, by
    exploiting flaws I now know about in the cat’s

    2) The one 3-spot I lost was not really a 3-spot,
    since one of the spots was towards the center,
    where it is of no help (to me anyway, with my
    current knowledge). So I consider that game
    a sorta-2-spot.

    3) Also, both a 2-spot-sorta-1-spot and *OMG*
    an actual 1-spot game have showed up, both of
    which I lost badly. Makes me wonder now if
    a holy-grail zero-spot game exists.

    Where does this all leave me?

    1) I know for sure that there are certain
    consistent mistakes that the cat makes, which
    allow me to win actual and sorta 3-spots, games
    that could not, in my opinion, be won without
    knowing these flaws in the cat’s thinking.
    In other words, there are ways to bait the cat.

    2) I know that there are other mistakes that
    the cat makes which I do not yet understand.
    Are they randomly inserted muck-ups of no
    real utility to a player? Or am I provoking
    these mistakes without yet knowing how?

    3) If these “other” mistakes turn out to
    be ALL random, then I would certainly still
    put Chat Noir in the “evil” pile.

    4) If these “other” mistakes are not ALL
    random, that is, at least some of them are
    consistent flaws in the cat’s thinking, yet
    together still insufficient to win all
    presented games, then yes of course, the
    game still goes into the “evil” pile.

    5) But what if, as I still guess, there turns
    out to be enough consistent-type flaws to win
    every presented game? Would I then consider
    the game not-evil? I think that would depend
    on just how ridiculously subtle those flaws
    might be. For example, if the only way I could
    win a one-spot or zero-spot game (as well as
    all other games of course) was to make my first
    three moves in the upper-left-hand corner, no
    matter what the cat did, because then the cat
    would follow me anywhere, I would consider the
    game definitely evil, even if always winnable.

    6) But if all remaining necessary-for-solving-
    the-really-hard-games flaws turn out to be of
    the type I already about, that is, relatively
    simple, aesthetically pleasing, in fact kinda
    feline-appropriate ways to bait the cat into
    mistakes, then Chat Noir will be in my opinion
    way-not-evil, but rather way-inspired-genius.

    I wish I had a few more IQ points. The
    required pattern-recognition at this point
    might be (way?) beyond mine.

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