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Shredder (Computer) vs Gull (Computer)
"UnBb3vable!" (game of the day Oct-18-2015)
nTCEC - Stage 2b (2013),, rd 14, Mar-25
Slav Defense: Steiner Variation (D16)  ·  1/2-1/2



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Kibitzer's Corner
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Premium Chessgames Member
  FSR: Houdini 3 and I (well, mostly Houdini) analyze the key position at
Premium Chessgames Member
  AylerKupp: <FSR> I just wanted to let you know that you have a minor error in your blog. Where you say "Yet it all clicks in problem-like fashion: after 46.Bxb3!! ..." it should of course say "46.Bb3!!"

Oh, and FWIW, the reason that I didn't run Fritz it's because it's not free so, cheapskate that I am, I haven't bought it.

Premium Chessgames Member
  FSR: <AylerKupp> Thanks - duly corrected. I didn't realize that you got all those engines for free. Amazing.
Premium Chessgames Member
  AylerKupp: <FSR> Well, not all. I actually paid for Rybka since at the time I bought it it was considered the best. That's before they allowed Houdini in the CCRL and CEGT tournaments.

But the rest, yes. Never underestimate the creativity of a cheapskate.

Jul-14-15  JohnBoy: UnBb3vable!
Premium Chessgames Member
  Penguincw: Good job <JohnBoy>. :)
Oct-18-15  scholes: Stalemate combination starts from 43 Re3 itself since both 43 Re3 and 44 Rxe4 are very weak if not for stalemate combination. Houdini 1.5a finds the draw very easily with 43 Re3 while stronger stockfish 6 struggles
Premium Chessgames Member
  offramp: <JohnBoy: UnBb3vable!> Yes, good job... That's a very good one. Probably my favourite this year.
Premium Chessgames Member
  keypusher: By the way, do these free engines run on macs? how do you get an interface?
Oct-18-15  mrandersson: A mac? sorry dude think you are stuck with Hiarcs on that os. You could in stall windows 10 on that mac in a dual boot like my friend did but after that he hasn't used his mac os in months.
Oct-18-15  nalinw: Now THIS is the kind of kibitzing that I value on CG. Unfortunately it is very likely that the trolls will never learn ......
Premium Chessgames Member
  Honza Cervenka: <FSR: I'm pretty sure that this is the greatest stalemating combination of all time in actual play, as opposed to a composition. Note that White had <six> pieces, all of which had legal moves, prior to 46.Bb3!! (See my Game Collection: Stalemate! for some more examples.) Does anyone disagree?>

Just for comparison look at W Wittmann vs A Rodriguez Cespedes, 1980, where white in final position missed a beautiful stalemate resource.

Oct-18-15  morfishine: One of my favorite engine vs engine games, really fascinating in all its phases
Premium Chessgames Member
  AylerKupp: <<keypusher> By the way, do these free engines run on macs? how do you get an interface?>

Stockfish 6 apparently has versions that run under both OS X and Linux and you can download it from

There are also several emulators that will let you run Windows and OS X applications concurrently on the Mac without needing to dual boot. The most popular is probably Fusion by VMWare; you can buy it for $ 80 but you can download a trial version from here and see if it meets your needs. VMWare has been around for years and I used it in a similar situation to run Linux applications at full speed under Windows without any problems.

Take a look at this link,, many suggestions there.

If you are unsuccessful in finding what you need, contact <capafan> and tell him that I asked you to. He has a Mac yet has been contributing to the currently ongoing Team Chess Challenge and regularly contributes analyses using Komodo. Of course, since you are on the opposite team, I'm not sure if either I or <capafan> should be helping you and therefore indirectly helping Team Black at this time. :-)

Oct-18-15  JohnBoy: Thanks - but the pleasure I took in examining this game, and giving its name, was greatly enhanced by <FSR>'s unbridled enthusiasm for it. Thank you, Fred.
Premium Chessgames Member
  AylerKupp: <JohnBoy> I thought about suggesting something pedantic like "The Immortal Computer Stalemate" but your "UnBb3vable!" is so much more clever, succinct, and appropriate. Kudos.
Oct-18-15  drleper: <AylerKupp> Stockfish is very strong and has a native Mac version ( Komodo is available for Mac too ( So virtual machines are possible but not really necessary anymore. All a Mac user needs to do is download a host program (e.g. ChessX and configure it to run the chess engine they've downloaded.
Premium Chessgames Member
  Check It Out: Interesting game, good pun!
Premium Chessgames Member
  AylerKupp: <drieper> Thanks for the info, and I'm sure that <keypusher> and other Mac users appreciate it also. I had the occasion to visit the Komodo site for an unrelated reason and saw that they also provide a native code version for the Mac and apparently have since Komodo 5.1, their first multi-core version. I came back to this page to indicate this and found out that you had beaten me to it. Unfortunately for <keypusher> Komodo is not free, but it's reasonable (or, at least, not unreasonable), around US $ 60.
Oct-19-15  kevin86: Good stalemate trap. Black is forced to eat the rook.
Apr-07-16  thegoodanarchist: <FSR: <AylerKupp> Thanks. I notice that you didn't run Fritz. I have Fritz 11 SE (it comes with ChessBase 12). I set it to work just now, and it took 49 seconds to find 46.Bb3! All of this makes me glad I've got Houdini 3. To Houdini I say, echoing SinĂ©ad O'Connor, <Nothing Compares 2 U>>

Ok, now stop posting and take me to church.

Dec-22-16  j4jishnu: One of the best computer AI play O have ever studied. Mindblowing stuff by a primitive version of Shredder. The Pun is equally good. Cheers to Chess Engines and the future of better analysis.
Jan-14-17  j4jishnu: This game is one among my personal favourites. What a spectacular line of play to a brilliant Stalemate. Unbelievable combination! Now, I'll start loving computer chess.
Premium Chessgames Member
  FSR: Great Sunday puzzle after 44...Qxa4.
Dec-03-21  EvanTheTerrible: One of my favorite games, engine or otherwise.
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