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Anna Hahn vs Aaron Pixton
US Championship 2003 (2003), Seattle, WA USA, rd 2, Jan-10
Dutch Defense: Semi-Leningrad Variation (A81)  ·  0-1



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Kibitzer's Corner
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Premium Chessgames Member
  Sargon: This is not the correct puzzle for this Monday. I'm taking a look at why this one was erroneously selected. There's a new one on the home page, so you get two for one today!
Mar-04-19  dfcx: I also got here just now for the Monday puzzle. Checking home page again for the new one
Premium Chessgames Member
  al wazir: For a change, this "very easy" puzzle *was* very easy.

This is one of my favorite combinations. I use variations of it about once a week.

Premium Chessgames Member
  Penguincw: < al wazir: ... This is one of my favorite combinations. I use variations of it about once a week. >

And I use it once a month.


But for real: not exactly a recycled puzzle, but I got it the first time, in the brief moments that it was up.

This may be the actual Monday puzzle that <cg> was saving for today.

And I'm happy that I got it again. Surprisingly it's not that easy getting a puzzle correct both times...

Mar-04-19  lost in space: LHM, so good to have no amnesias.
Premium Chessgames Member
  Sargon: Have some of you poor souls briefly slipped into another instance of the multiverse—one which featured <this> game as Puzzle of the Day for Monday, March 4, 2019—only to find yourself suddenly transported back into the <correct> universe?

The reason I ask is because from the moment the clock struck midnight on March 3, 2019—at least in <this> particular universe—the Monday Puzzle of the Day has been the URL Kramnik vs Aronian, 2009, just as it was intended to be.

In the future, please try to keep accurate logs of your inter-dimensional galavanting, because failure to do so can result in precisely the type of confusion which a small handful of you are doubtess experiencing at this very moment...

Premium Chessgames Member
  moronovich: <In the future, please try to keep accurate logs of your inter-dimensional galavanting, because failure to do so can result in precisely the type of confusion which a small handful of you are doubtess experiencing at this very moment...>

Woody Allen has made a beautiful movie called "Midnight in Paris",about going back in time.And return to the present. It is hereby higly recommended.

Premium Chessgames Member
  Penguincw: Haven't attempted a Monday puzzle in a while, and it's not a good sign when there's a purple link on one.
May-27-19  Whitehat1963: Yay! I love this Monday, even if itís not a queen sac.
Jul-15-19  Granny O Doul: Some things never get old.
Jul-15-19  lost in space: Re-Re-Recycler
Jul-15-19  Cheapo by the Dozen: Move 1: "Big pawn" to f3, although it won't stick.

Move 2: Actual pawn to f3. It does stick. :)

Premium Chessgames Member
  agb2002: Quickly becoming more famous than D Byrne vs Fischer, 1956
Jul-15-19  saturn2: Familiar
Jul-15-19  charlesdecharemboul: Certo una volta visti sembrano tutti facili!
Jul-15-19  TheaN: Pretty sure this has been featured a few times: Black secures f3 with a diagonally hitting piece and mate can't be prevented.
Jul-15-19  zb2cr: 26. ... Bf3, threatens mate in one. After White plays 27. exf3, exf3renews the threat with nothing White can do about it.
Jul-15-19  Damenlaeuferbauer: As an excellent mathematician, my old friend Aaron easily calculated 26.-,Bf3! 27.exf3,exf3 with Qg2# on the next move! Sometimes I guess, he could have achieved more in chess!
Premium Chessgames Member
  patzer2: Hooray! Easy Monday is back with 26...Bf3! quickly forcing mate.

P.S.: So where did White go wrong? According to Stockfish 10, the losing move was 23. Bxe4? fxe4 -+ (-4.39 @ 28 ply).

Instead, 23. h5 ⩱ to = (-0.47 @ 25 ply) gives White drawing chances:

<[Stockfish 10 64] 25:-0.47} 23.h5 Bh7 24.Qb2 f4 25.g4 b6 26.Bxe4 Bxe4 27.f3 bxc5 28.bxc5 Rab8 29.Qc3 Bh7 30.Bb2 Kg7 31.a4 a5 32.Ba3 Rb7 33.Ra2 Rfb8 34.Rb2 Rxb2 35.Bxb2 (0.00 @ 42 ply)>

Premium Chessgames Member
  whiteshark: <26...Bf3!!>, and that's it!
Jul-15-19  Chesgambit: very easy Bf3!
Premium Chessgames Member
  Breunor: Glad to see Monday puzzles going back to easy after missing a few!

Computer views that 23 Bxe4 was white's big mistake:

1) -2.65 (21 ply) 23...fxe4 24.Bb2 e3 25.Qc3 Qh3 26.e6 Rf6 27.h5 Be4 28.f3 Raf8 29.g4 Qg3+ 30.Kh1 Qxg4 31.Qe5 Qh3+ 32.Kg1 g4 33.Qh2 Qxh2+ 34.Kxh2 Rf5 35.Bd4 Rxh5+ 36.Kg3 gxf3 37.Bxe3 fxe2 38.Rxf8+ Kxf8 39.Rg1 Rf5 40.Bxh6+ Ke8

Instead white should play h5:

1) -0.33 (24 ply) 23.h5 Bf7 24.Bb2 g4 25.Bxe4 fxe4 26.Qd2 Bxh5 27.Kg2 Rf5 28.Rh1 Raf8 29.Raf1 Kh7 30.Bd4 Bf7 31.Be3 h5 32.Bf4 Rd8 33.Qd4 Qg6 34.Rd1 Be6 35.Qe3 Rff8 36.a4

The lines look very similar - it seems like the key difference is that in the line with 23 h5, black plays g4; although he wins the h pawn, he loses the ability to move the bishop to f3 or exploit the weak d1-h5 diagonal.

Oct-21-19  zb2cr: I remember this one-- 27. ... Bf3 threatens mate on g2 or h1, leaving White no choice but to play 28. exf3, after which Black renews the threat with 28. ... exf3. White can't counter the threat of mate on g2.
Premium Chessgames Member
  Sargon: Puzzle for 2019-10-21:

Sznapik vs D Komljenovic, 1987

Oct-21-19  Everett: Whites 23rd is one of the worst exchanges Iíve seen played by a good player.
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Featured in the Following Game Collections[what is this?]
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26...? (Feb-04-19; May-27-19; Jul=15, 19; Oct-21-19)
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