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Eugene Delmar vs Francis M Roser
Cafe International (1876), New York, NY USA
Queen's Gambit Declined: Modern Variation (D50)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
May-20-10
Premium Chessgames Member
  GrahamClayton: Maybe Black should have played 15...♖ab8 to contest the open b-file.
Sep-12-14  bengalcat47: Black's mistake was Nc6 at his 5th move. The Black b-Knight is commonly developed at d7 to leave open the possibility of moving the c-Pawn to c5. Of course this opening was being used here 19 years before Pillsbury introduced it at Hastings in 1895, soit wasn't well known in 1876.
Jan-18-22  Brenin: 20 Qxc6 cxb6 (20 ... Rf7 21 Qxd5 is less disastrous for Black) 21 Qxd5+ Kh8 22 Qe5+ Kg8 23 Qg7 mate.
Jan-18-22
Premium Chessgames Member
  Phony Benoni: Wonder how that rook got to b6? Black's llast move must have been ...Qd7-c8.

Well, at any rate, 20. Qxc6 looks good. If 20...cxb6 the rook on b7 rules and 21.Qxd5+ leads to mate. If 20...Rf7 21.Qxd5, when the rook on b6 is still immune and things are getting ugly for Black very quickly.

Jan-18-22  Tiggler: After seeing this and yesterday's puzzle I realize that I was born 100 year too late. I could have been a contender!
Jan-18-22  Cheapo by the Dozen: I love Tuesdays!
Jan-18-22
Premium Chessgames Member
  An Englishman: Good Evening: Did not expect to find 82 games in the DB with 5...Nc6. *Really* did not expect to find games played as recently as 2020. Still people out there trying to make the move work.
Jan-18-22
Premium Chessgames Member
  raymondhow: Not sure why it took me so long to see that, felt more like a Wednesday puzzle.
Jan-18-22  mel gibson: Another easy one but Stockfish 14 shows
that Black can fight much better:

20.Qxc6

(20. Qxc6 (♕a4xc6 ♖f8-f7 ♕c6xd5 ♔g8-g7 h2-h3 ♔g7-f8 ♕d5-e5 ♔f8-g8 ♖b6-b5 a5-a4 c5-c6 h7-h6 d4-d5 ♕c8-d8 c3-c4 g5-g4 h3xg4 f5xg4 ♖b5-b1 ♕d8-h4 ♖b7-b8+ ♖f7-f8 ♖b8xf8+ ♖a8xf8 g2-g3 ♕h4-f6 ♕e5xf6 ♖f8xf6 ♖b1-b8+ ♖f6-f8 ♖b8xf8+ ♔g8xf8 d5-d6 c7xd6 c6-c7 ♔f8-f7 c7-c8♕ d6-d5 ♕c8xg4 d5xc4) +8.57/34 149)

score for White +8.57 depth 34.

Jan-18-22
Premium Chessgames Member
  agb2002: Black threatens cxb6.

The pawn on c7 blocks the action of the rook on b7. This suggests 20.Qxc6:

A) 20... cxb6 21.Qxd5+ Kh8 22.Qe5+ and mate in two.

B) 20... Rf7 21.Qxd5 wins two pawns at least (21... cxb6 22.Qxf7+ and mate next).

C) 20... Rd8 21.Rxc7 traps the queen.

D) 20... Qd8 21.Rxc7 wins two pawns at least (21... Re8 22.Rbb7; 21... Rb8 22.Qe6+ Kh8 23.Qf6+).

Jan-18-22  stacase: At first glance this looked complicated, but then noticing that 20...cxb6 gives the White Rook control of the 7th rank seems to be key as it puts the Black King in a box. Sooo, 20.Qxc6 where she can say check on her next move 21.Qxd5+ and check again 22.Qe5+ Black can interpose a Rook but it doesn't work as there's no support:

22...Rf6
23. Qxf6+ Kg8
24. Qg7#

Nice Tuesday fun. Tomorrow more Queen & Rook fireworks?

Jan-18-22  Cheapo by the Dozen: By the way, I very quickly saw the general idea in the form of Qe6, but was a little slow in realizing that Qxd5 had the same merits (and would actually work).
Jan-18-22
Premium Chessgames Member
  saffuna: All the minor pieces and no pawns exchanged after 19 moves.
Jan-18-22  TheaN: Once you spot the key move, it becomes clear variations are not <as> relevant in this line as it normally would: Rb6 is poison and will be for a while.

<20.Qxc6> is curtains. Black can try to get out of this mess but is getting annihilated: Pc7 and Pd5 are in and only one can be saved. The main alternative is 20....Rf7, but now 21.Qxd5! +- is still possible freeing up the sixth rank for Rb6, even though it's still poisoned: 21....cxb6 22.Qxf7+ Kh8 23.Qxh7#.

So why is it poisoned? Because Black lacks control over the diagonals aimed at the king side <20....cxb6 21.Qxd5+ Qe6 22.Qxe6+ Kh8 23.Qe5+ Rf6 24.Qxf6+ Kg8 25.Qg7#> and down and out.

Jan-18-22
Premium Chessgames Member
  chrisowen: I v fire wire Qxc6 garrulous v it abridge logs a v it hoof ruffle i v fire wire hoots dags quagmire q c mack blink pork v it fire wire july hays pets it v snick dink z ow gleam quibble crummy it v farmed it v hood carafes it v i cuff figs dank eggs ecumen fine good accomodate good head it v in sad it v javelin digs c motel hon v it no shut ro c budgen effect heel geod class d eeyore gels dace mill mute v it thang ron gen a lip it v sell u zz be ooh dude it v c lantern eels back bog lag catch leo ebbs log bull cods er am sac c dean it gruffalo v it ram c feel it uvray dud c gedulf u fee it cage its ae bu fee it vam madden kits roof fandom c v its end figs v its ma cars v its creed its v eg u need it ram leon u gee v its ned it v rook marley no what's in store mod x files france sim sorry no far v it sin c flowers cafe d7 energy rem lad castle duel mare it v rally Qxc6 eeyore;
Jan-18-22  siggemannen: <Eeyore> indeed
Jan-18-22  AlicesKnight: Saw the gameline after a little thought; there seems no salvation for Black in other routes (e.g. ... Rf7).
Jan-18-22
Premium Chessgames Member
  gawain: Frustrating! I came back to this one several times and still no joy. Even when I tried the right move I did not see the correct follow-up.
Jan-18-22  landshark: This puzzle drives home the point for me that chess is much more about <seeing> than <thinking>.

Over breakfast I pored over it for a good 15 minutes before the obvious follow-up to 20.Qxc6 cxb6 became clear:

Until I <saw> that Black's c6 pawn was no longer on the board to defend d5, I immediately saw I the mating sequence beginning with 21.Qxd5+.

Before that, I was searching in vain for a good follow-up to the R sacrifice because Black had the checking squares e6, f7, and g6 covered and there was that nasty imaginary pawn still defending d5...

There's probably a 200 rating point difference between the version of me that's got my chess sight fully operational and the other version that doesn't.

Jan-18-22
Premium Chessgames Member
  mjmorri: <GrahamClayton: Maybe Black should have played 15...♖ab8 to contest the open b-file.>

Instead, Black plays f5, a5, and g5 allowing the White Rooks to take up their aggressive positions.

Jan-18-22
Premium Chessgames Member
  drollere: i had 20. Qxc6. i just played out the game variation, 20. .. pxb6, as i couldn't find a useful defense with R or Q.
Jan-18-22  Lloyd Gross: Once I got the first move, this seemed easier than yesterday's.

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