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Ian Snape vs Nicholas Pert
4NCL (2011/12), Hinckley ENG, rd 3, Jan-14
French Defense: Winawer. Poisoned Pawn Variation Main Line (C18)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
Dec-16-22  Brenin: I missed Pert's move 26 ... d3, but instead I was tempted by Rc3, since either Bxc3 or Nxc3 allows dxc3, opening up the d-file for Black. The follow-up to this unforcing move was too complicated for me, White having too many responses.
Dec-16-22  jrredfield: It's very close between 26 ... Nxd2 (one that I seriously looked at) and 26 ... Rc3 (which I never considered).

26. ... Nxd2 27.Kxd2 e5 28.Qf5 e4 29.Qf4 Rxc2+ 30.Kd1 Qxf4 and two pawns bearing down puts White in command.

Dec-16-22  jrredfield: 26 ... d3 to me doesn't give white a clear enough edge to force a win - I couldn't see a winning combination as certain as for Nxd2 or Rc3.
Dec-16-22  Brenin: 26 Rxf3 Bxf3 27 Qg7 might have avoided the trouble arising from 26 Kd1 d3.
Dec-16-22  King.Arthur.Brazil: The King reaches the same position, though working with transposed sequence: 26...♘xd2 27. ♔xd2 d3 28. cxd3 ♖c2+ 29. ♔d1 ♖xe2 30. ♗xe2 ♕xg3. The move 32...♖c8! is the hardest and winning one, since it cuts off the ♔ passage toward ♕ side. White cannot reply 36. ♗xf3 ♕xf3+ 37. ♔d2 ♕f2+ and check-mate near. Black explores the isolated ♖ and checks to capture the remaining h pawn and game over.
Dec-16-22  jrredfield: Correction: I mistakenly said that 26 ... Nxd2 would put White in command. I meant it puts Black in command.
Dec-16-22
Premium Chessgames Member
  An Englishman: Good Evening: Found the solution (*eventually*), but had the puzzle consisted of 22...Black to Play, impossible. Pert clearly anticipated sacrificing a Knight when he played 22...Ng6, because otherwise it's simply foolish to provoke 23.h5. Never had the imagination to see beyond that.

Game also offers a great example of what attracts players of the Black pieces to the Poisoned Pawn Winawar French.

Dec-16-22  Mayankk: I was tempted by the Rook sac 26 ... Rxc2 27 Qxc2 Qxc2 28 Kxc2 d3+ 29 Kd1 dxe2 30 Bxe2 Rxd2+ 31 Kc1 Rxe2.

But if White plays 30 Kxe2 instead, Black is suddenly low on material and the attack has dissipated...

Dec-16-22  mel gibson: I saw the text move after about 2 minutes.
However Stockfish 15 makes a different move:

26... Rc3

(26. .. Rc3 (♖c5-c3 ♖g3-h3 ♖c3xa3 ♖b1-c1 ♕c7-e7 ♗f1-g2 ♘f3xd2 ♖h3xa3 ♗b7xg2 ♔d1xd2 ♕e7xa3 ♕h7-d3 ♕a3-a5+ ♔d2-d1 ♕a5-d5 ♔d1-e1 ♗g2-e4 ♕d3-d2 ♕d5-e5 h5-h6 ♗e4-f3 ♕d2-f4 ♕e5xf4 ♘e2xf4 ♗f3xg4 ♘f4-d3 f7-f6 ♔e1-d2 ♖d8-h8 ♖c1-h1 ♗g4-f5 ♘d3-f2 ♔b8-c7 ♘f2-d1 ♗f5-e4 ♖h1-h4 ♗e4-g6 ♘d1-f2 ♗g6-f5 ♘f2-d1 e6-e5 c2-c3 d4xc3+ ♘d1xc3 ♔c7-d6 ♖h4-h1 ♔d6-e6 ♘c3-b5 ♖h8-h7 ♔d2-e3 a7-a5 ♘b5-a3 ♖h7-h8 ♔e3-e2 ♗f5-e4 ♖h1-h4 ♗e4-g6 ♖h4-h1 a5-a4) +6.15/37 125)

score for Black +6.15 depth 37.

If I force Stockfish to follow the text move:

26. Kd1 d3
27. cxd3

(27. cxd3 (c2xd3 ♘f3xd2 ♔d1xd2 ♖c5-c2+ ♔d2-d1 ♖c2xe2 ♗f1xe2 ♕c7xg3 ♖b1-c1 ♕g3-f2 h5-h6 ♗b7-d5 ♖c1-c3 ♕f2-f6 ♔d1-c2 ♔b8-b7 d3-d4 ♖d8-h8 ♕h7-g7 ♖h8xh6 ♕g7xf6 ♖h6xf6 ♖c3-h3 ♖f6-f4 ♔c2-d3 b6-b5 ♔d3-e3 ♖f4-e4+ ♔e3-d3 ♔b7-b6 ♖h3-h5 e6-e5 d4xe5 ♖e4-a4 ♖h5-h8 ♗d5-e6 ♔d3-c2 a7-a6 ♖h8-h3 ♖a4-e4 ♗e2-d1 ♖e4xe5 ♖h3-g3 ♖e5-g5 ♔c2-c3 a6-a5 ♖g3-g1 ♔b6-c7 ♗d1-e2 ♖g5-c5+ ♔c3-d2 ♔c7-d6 ♖g1-b1 ♔d6-c6 ♗e2-f3+ ♔c6-c7 ♗f3-e2 ♔c7-b6 ♖b1-g1 ♖c5-g5 ♔d2-c3 ♔b6-c5 ♖g1-b1 ♔c5-c6 ♗e2-f3+ ♔c6-b6 ♖b1-g1 ♔b6-c5 ♗f3-d1 ♔c5-d6 ♗d1-e2 ♖g5-c5+ ♔c3-d4) -1.88/51 161)

score for White -1.88 depth 51.

Dec-16-22  Refused: Positionally that b1-h7 diagonal looks key. So cutting the queen off should be the theme. thus 26...d3 27.cxd3 Nxd2 28.Kxd2 Rc2+ 29.Kd1.Rxe2 30.Bxe2 Qxg3 winning a piece should be it. At some point those pawns on the king side should drop eventually.
Dec-16-22  HaydenB: The correct answer is Rc3 Another chessgames puzzle "cooked" by Stockfish
Dec-16-22  sudoplatov: My first choice was ...Rc3 but I probably would have played ...Nxd2. Stockfish likes both.
Dec-16-22
Premium Chessgames Member
  chrisowen: Guffaws quick c jolly its um went d3 fab Rc3 feel adept net body tad its a duck neck u key ah c ruck d3 good Rc3 boxed;
Dec-16-22
Premium Chessgames Member
  agb2002: Black has a pawn for a bishop.

The first idea that comes to mind is 26... d3 27.cxd3 Nxd2 28.Kxd2 Rc2+ followed by Rxe2 seems to recover material (29.Kd1 Rxe2 30.Bxe2 Qxg3) with the better position.

It is tempting 27... Rc2 in view of 28.Bf4 (28.Be1 Qc4 and 28.Be3 Rxe2 must be winning) 28... Qxf4 29.Kxc2 (29.Nxf4 Rd2+ 30.Kc1 Rc8#; 29.Rxf3 Qd2#) 29... Qd2+ 30.Kb3 Nd4+ 31.Kc4 (31.Ka4 Qa5#) 31... Ba6+ 32.Rb5 Bxb5#. However, 28.Rxf3 Bxf3 looks unclear.

Dec-16-22
Premium Chessgames Member
  chrisowen: I want to play a game
I was back x
Dec-16-22
Premium Chessgames Member
  scormus: There is something I don't really like about puzzles with multiple playable solutions. I pick one that isn't the text, then think I got it wrong. Then again, isn't that life?

Today I considered 26 ... d3 and ... Nxd2. I felt the first was premature, opting for the second, whichi thought was winning. Confess I didn't consider Rc3

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