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Emil Joseph Diemer vs Portz
"Portz in a Storm" (game of the day Oct-14-2017)
Lindau (1948)
Blackmar-Diemer Gambit: Ryder Gambit (D00)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Given 55 times; par: 20 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 7 OF 7 ·  Later Kibitzing>
Mar-15-10
Premium Chessgames Member
  fm avari viraf: When this game was played, I was just two years old. Now, I keep teaching such tactics to my students scores of times in my academy. The Queen looks more beautiful on c6 & becomes immortal.
Mar-15-10  Cardinal Fang: Qxc6. I'd only scrolled down as far as the third rank.
Mar-15-10  Brandon plays: Qxc6 bxc6 Ba6# seems suggested. I was thinking g4 for a second, but that doesn't really do anything.
Mar-15-10  ROO.BOOKAROO: The crisscrossing of the two white bishops is key. It jumps to your eyes. Then the queen sacrifice is obvious. For once I got the puzzle without any hesitation, in 10 secs flat. Maybe I am not yet a lost case. Of course, we are mentally prompted because we know there's now a key move. The prompting is 50% of the equation.
Mar-15-10  Shah Mat: <fyad reject>

don't feel bad man. i've spent the last 2 weeks doing mate-in-twos, white to moves in Laszlo Polgars Chess, and i still didn't find this in spite having solved at least 3 dozen similar puzzles as recently as 10 hours ago.

in fact, your description of what you looked for mimicked mine almost exactly.

i also felt stupid when i saw the solution =(((

Mar-15-10
Premium Chessgames Member
  OBIT: Wow... I pulled up Diemer's games with the BDG in this database, and I see his record is 104 wins, 8 losses, 1 draw. This is just further proof, of course, that opening statistics are meaningless in a database like this. Speculative openings always score great in selective databases, since the games that get uploaded are usually the ones where the opening worked great.

By comparison, when I check the results after 4...exf3 (main line BDG) in a database of master level games, I see White scores under 40%.

Mar-15-10  Marmot PFL: I saw the mate in a couple of seconds, but have been trying all day to remember it's name. Thanks you kevin86.
Mar-15-10
Premium Chessgames Member
  Once: Okay, let's strip this one down to its core components and see if we can make it easier to remember. Here's the absolute basic unplugged position:


click for larger view

The combination of the black rook and knight plus the white bishop mean that the black king is almost stalemated. All it would take would be for a bishop or queen to land on a6 and it would be mate.

Here's the same mating pattern with a few more pieces added:


click for larger view

The pawn on b7 is all that stops white from playing Ba6#. So all we need to do is to deflect the b7 pawn with 1. Qxc6+ bxc6 2. Ba6#.


click for larger view

The other way to remember this one is by spotting the landmarks. Black has castled queenside after playing c6. This means that his queen knight can't go to c6 where it really belongs, so it has to go to d7.

That's black's side of the equation. He has voluntarily boxed his king in.

For his part, white has bishops and queen poised to jump into the queenside. Whenever you get these factors, you should always be on the lookout for Boden's mate.

Mar-15-10  hedgeh0g: A fairly common tactical theme today: Boden's mate. White forces mate with Qxc6+! bxc6 Ba6#.

Having a bishop lasering into the opponent's queenside-castled position often generates a lot of tactical opportunities. Definitely a pattern to remember.

Mar-15-10  SamAtoms1980: Roll the Queen right into the fortress of the enemy. Good ol' Monday.
Mar-15-10  JG27Pyth: The original: R Schulder vs S Boden, 1853

Talk about castling into it.

Mar-15-10  ku0826: Forced mate with Queen is decisive.
Mar-15-10  turbo231: I don't have a clue.
Apr-21-12
Premium Chessgames Member
  Infohunter: <JG27Pyth: Talk about castling into it.>

Just like what happened in Ed Lasker vs F Englund, 1913.

Oct-14-17
Premium Chessgames Member
  thegoodanarchist: <Marmot PFL: I saw the mate in a couple of seconds, but have been trying all day to remember it's name. Thanks you kevin86.>

I didn't even know it had a name!

I learned something new today.

(Or did I just forget it twenty years ago and get reminded today? I guess if you have no memory of ever learning it, then it counts as new!)

Oct-14-17
Premium Chessgames Member
  FSR: I wrote much of this Wikipedia article: https://en.wikipedia.org/wiki/Boden...
Oct-14-17
Premium Chessgames Member
  FSR: As soon as I saw Bf4 I thought, "Oh no. Black's going to move his queen to the kingside instead of playing Qa5 . . . ."
Oct-16-17
Premium Chessgames Member
  kevin86: Boden's mate in thirteen moves!
Dec-20-18
Premium Chessgames Member
  louispaulsen88888888: Its, not “it’s.
Dec-20-18
Premium Chessgames Member
  louispaulsen88888888: It's is a contraction of “it is” or “it has.” Its is a possessive determiner we use to say that something belongs to or refers to something. ... They are pronounced the same, there's a very small difference in how they're written, and it's also easy to mistake the contraction in it's for a possessive.
Dec-20-18
Premium Chessgames Member
  whiteshark: Game #23 in Diemer's only book <Vom Ersten Zug an auf Matt!>, (solely on the Ryder's Attack), p25.
Dec-20-18
Premium Chessgames Member
  Jean Defuse: ...

<Diemer's only book>?

see: https://portal.dnb.de/opac.htm?meth...

...

Dec-21-18
Premium Chessgames Member
  whiteshark: <Jean Defuse> rrght, that was kinda careless - thanks for pointing out.

It should have read that "Diemer's only book <on the BDG>"

Dec-21-18
Premium Chessgames Member
  Jean Defuse: ...

<whiteshark> If you're interested:

Ostende Internationales Schachmeisterturnier 1937

ChessBookForum chessforum

...

Jan-14-19  Isilimela: From a very similar opening, a very similar conclusion: Keres vs Verbac, 1933
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