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John D Carlin vs Nicholas Pert
London League (2011), ?, rd 3, Sep-??
French Defense: Winawer. Poisoned Pawn Variation Main Line (C18)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Oct-05-17
Premium Chessgames Member
  FSR: 27...Rxg3+ 28.hxg3 Qxg3+ is crushing: 29.Kh1 Rh8+; 29.Kf1 Rg8 or Rh8; 29.Rg2 Qe1+ 30.Kh2 Rh8#.
Oct-05-17
Premium Chessgames Member
  uniqueid: It seems like the game move 28. Rh8 is the key move securing win for black. <FSR> 29.Rg2 Qe1+ and 30. Bh1 instead of 30. Kh2, saves the game for white (even with the e-pawn marching down). The Stockfish analysis shows draw after 30. Kh2

<chessgames.com> pretty awesome that you've made the engine analysis dynamically linked to the game analysis. Thank you!

Oct-05-17  raviarun: Better response to 29.kf1 is ...Qf1+. Followed by 30.Ke1 Qh1#, or 30.Kg1 Rg8+
31.Kh2 Qh5# or 31.Rg2 Qg2#
Oct-05-17  raviarun: I missed Bf1 defence too. Thanks <uniqueid>
Oct-05-17
Premium Chessgames Member
  FSR: <uniqueid> You're right - in my zeal to be first, my analysis left something to be desired.
Oct-05-17  lost in space: What a wonderful pawn on e3, not allowing Kf2. And how good it is to Black, this pawn c2, not allowing a coordination of Queen and rook on the second rank.

27...Rxg3+ 28. hxg3 Rh8! 29. Rg2 Qh5! and no way to protect whites king from mate

Oct-05-17
Premium Chessgames Member
  WorstPlayerEver: Ghe after a few seconds I thought: why grabbing that useless pawn? I am not some totally senseless materialistic guy. Yay!
Oct-05-17  Walter Glattke: 28.-Rh8?? 29.Kf1 Qh5 30.Ke1 Qh1+ 31.Ke2
Qxg2+ 32.Kxe3 -+. but 28.-Qxg3+ 29.Kh1 Rh8# or 29.Kf1 Rh8 30.Rg2 Rh1+ 31.Ke2 Re1#
Oct-05-17
Premium Chessgames Member
  piltdown man: That was a pert pair of moves.
Oct-05-17  saturn2: After 27...Rxg3 28 hxR black has the open h file, the pawn e3 and queen plus rook to attack the king. It should be enough.
Oct-05-17
Premium Chessgames Member
  Richard Taylor: I have to be honest I failed to find the correct solution finding a "brilliant" solution that fails in the end...But the game continuation leads to a beautiful mate.

So I will now done sackcloth and ashes and torment myself for 40 days...

Very instructive indeed!

Oct-05-17
Premium Chessgames Member
  Richard Taylor: In fact I went for <FSR>'s line and had the pawn on e2 about to cause mate forgetting that the Q on b5 could take it...but every other move wins for Black!

Oh well, it is so easy to miscalculate such things and Rh8 is very powerful, leaving no ragged ends...

Oct-05-17
Premium Chessgames Member
  WorstPlayerEver: Ghehe well.. I forgive you guys. It's still mind over matter.
Oct-05-17
Premium Chessgames Member
  patzer2: Looking at it from the White side I had difficulty with today's Thursday puzzle (27...?,) as I kept wanting to force things with 27...Rxg3+ 28. Rxg3 hxg3 Qxg3?

Unfortunately, this fizzles out to a level position after 28...Qxg3+ 29.Rg2 Qe1+ 30.Bf1 e2 31.Rxe2 Qg3+ 32.Rg2 Qe3+ 33.Kh1 Rh8+ 34.Rh2 Qf3+ 35.Kg1 Rxh2 36.Kxh2 Qxf1 = (0.00 @ 43 depth, Stockfish 8.)

So I decided to flip the board and looked at it from the Black side and after 27...Rxg3+ 28. Rxg3 (diagram below)


click for larger view

the winning follow-up move 28...Rh8! -+ became clearly obvious. This forces mate after the game continuation or 28...Rh8! 29. Rh2 Qxg3+ 30. Rg2 Qe1+31. Bf1 Qh5 (diagram below.)


click for larger view

Here (diagram above,) White only has silly spite check piece sacs to delay mate-in-one.

P.S.: White's game starts to go bad with 21. Bxd3? exd3 ∓ (-0.98 @ 30 depth, Stockfish 8.) Instead, the defensive maneuver 21. Rf2 Ng4 22. Re2 Qe7 23. Nf1 Qh4 24. g3 Ke1 = (0.00 @ 33 depth, Stockfish 8) holds it level.

White's game goes from bad to worse with 22. Rbe1? Nd4 -+ (-2.33 @ 31 depth, Stockfish 8.) Instead, 22. Qc4 Qe7 23. Rfe1 ⩱ (-0.52 @ 31 depth, Stockfish 8) gives White a fighting to survive.

Oct-05-17
Premium Chessgames Member
  morfishine: Black played all the Pertinent moves

*****

Oct-05-17  mel gibson: Move
24. K x B

is already mate in 16:

24. Kxg2 Qb7+ (24. .. Qc6+
(♕c7-c6+ ♔g2-g1 ♘d4-f3+ ♖f1xf3 ♕c6xf3 c2-c3 ♖g8xg3+) +M16/13 73)

score for Black - mate in 16

Oct-05-17
Premium Chessgames Member
  Sally Simpson: Got it (insert smug smiley.)

'cept here.


click for larger view

I threw in 29.Qd1+ Bf1 and then 30 Qh5. which does mate.

29.Qd1+ was played forcing 29...Bf1 to stop 30...Kf1 after 30.Qh5 as position appeared:


click for larger view

I realised 30...Kf1 31.Qd1 mate.

But keep smug smiley. Did not botch it just over elaborated a little and again blaming solving upside down with Black to play.

Oct-05-17  Lambda: I saw 28...Qxg3+ 29.Rg2 Qe1+ 30.Bf1 e2 31.Rxe2 Qg3+ 32.Rg2 Qe3+ but thought it was winning, somehow missing the fact that the king can go to the h-file on h1 and then the rook can cover it on h2.
Oct-05-17
Premium Chessgames Member
  WorstPlayerEver: ( ͡ ͜ʖ ͡)
Oct-05-17
Premium Chessgames Member
  Sally Simpson: Thanks W.P.E. that will be my smug smiley.
Oct-05-17  Cheapo by the Dozen: I hallucinated about:

29 ... Qd1+
30 Bf1 e2
31 Rxe2 Rh1+

But on review, I don't think that really works (and may not work against 31 Rf2 either).

Oct-05-17  Cheapo by the Dozen: By the way, the problem with

28 ... Qxg3+
29 Rg7 Qe1+
30 Bf1 Rd1

is that White has too many attacking chances of his own. There's no way Black can win at this point with a non-forcing line.

Oct-05-17
Premium Chessgames Member
  kevin86: No escape without loss of the rook.
Oct-05-17  SuperPatzer77: <patzer2> <...the winning follow-up move 28...Rh8! -+ became clearly obvious. This forces mate after the game continuation or 28...Rh8! 29. Rh2 Qxg3+ 30. Rg2 Qe1+31. Bf1 Qh5 (diagram below)...>

You mistyped 31...Qh5 - it should be 31...Qh4 but I saw your correct diagram.

SuperPatzer77

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