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Maya Shapir (Porat) vs Bela Lengyel
FSIMA February (2008), Budapest HUN, rd 4, Feb-05
Queen's Gambit Declined: Semi-Tarrasch Defense. Symmetrical Variation (D40)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Apr-12-22  Brenin: 41 ... Rd2+ 42 Nxd2 (42 Kg1 Rg2+ 43 Kh1 Rc2+ 44 Kg1 Rxc1 and Black is a R up) Rxd2+ 43 Kg1 Ne2+ 44 Kf1 Nxc1, winning a piece, and if 45 Rc4 forking B and N then 45 ... Bb5 pins the R.
Apr-12-22  mel gibson: A little bit tricky for a Tuesday as there are many winning lines.

Stockfish 14 agrees with the text line:

41... Rd2+

(41. .. Rd2+ (♖d3-d2+ ♘f1xd2
♖d8xd2+ ♔h2-g1 ♘c3-e2+ ♔g1-f1 ♘e2xc1 ♖b4-b6 ♗c6-d5 ♔f1-e1 ♖d2-h2 ♖b6-d6 ♘c1-d3+ ♔e1-f1 ♗d5-c4 ♖d6-b6 ♖h2-f2+ ♔f1-g1 ♖f2-a2 ♖b6-b7+ ♔f7-e6 ♘a1-b3 ♔e6-d6 ♖b7-b8 ♔d6-c7 ♖b8-e8 ♗c4xb3 ♖e8-e3 ♖a2-a1+ ♔g1-h2 ♗b3-d5 ♖e3-e7+ ♔c7-d6 ♖e7-d7+ ♔d6-c5 ♖d7xd5+ ♔c5xd5 ♔h2-g2 ♔d5-d4 ♔g2-h2 ♔d4-e3 ♔h2-g2 ♘d3-e1+ ♔g2-f1 ♘e1-f3+ ♔f1-g2 ♖a1-g1+) +M24/70 405)

score - Black wins mate in 24.

Apr-12-22  King.Arthur.Brazil: One of the best variants is: 44. ♔f2 ♘xc1+ 45. ♔e3 ♖d3+ 46. ♔f2 ♖f3+ 47. ♔g1 ♘e2+ 48. ♔h2 ♖f2# 42.Rd2+ is easy win!
Apr-12-22
Premium Chessgames Member
  An Englishman: Good Evening: The best part of the game consists of the position after 25.Rb2. Now *that* is one tied-up Queen side. Great example of how piece activity can top the combination of material advantage and better pawn structure.
Apr-12-22  saturn2: 41.. Rd1 was my choice.

42.Rxc3 Rxf1 and white cannot play Rxc6
or
42.Nb3 Rxc1 43.Nc1 Rd1

Apr-12-22  Skewbrow: I will try my luck with 41..Rd2+. If white tries 42. Nxd2 Rxd2 43. Kg1 Ne2+ 44. Kf1 Nxc1 leaves black a piece ahead. White cannot try to immediately recover the lost piece with the rook fork 45. Rc4 because 45..Bb5 pins the last major piece. If white does 44. Kf2 to thwart the pin then 44..Nc1 is a discovered check. 42. Kg1 Ne2+ comes to much the same thing.
Apr-12-22
Premium Chessgames Member
  agb2002: Black has a bishop for a knight.

The airy position of the white king and the defenseless rook on c1 suggest 41... Rd2+:

A) 42.Nxd2 Rxd2+ 43.Kg1 Ne2+

A.1) 44.Kf1 Nxc1

A.1.a) 45.Rc4 Bb5 46.Ke1 Re2+ 47.Kd1 Bxc4 wins a rook.

A.1.b) 45.Ke1 Nd3+ 46.Kxd2 Nxb4 wins a piece.

A.2) 44.Kf2 Nxc1+

A.2.a) 45.Ke3 Re2+ 46.Kd4 Re4+ 47.Kc5 (47.Kc3 Na2+ wins a rook and a piece) 47... Nd3+ 48.Kxc6 Rxb4 wins a rook.

A.2.b) 45 Ke1 transposes to A.1.b.

A.2.c) 45.Kg(f)1 Nd3 wins a piece.

A.3) 44.Kh2 Nxg3+ 45.Kxg3 (or 45.Kg1) 45... Rg2#.

B) 42.Kg2 Ne2+ (or 42... Rg2+ 43.Kh1 Rc2+)

B.1) 43.Kh2 Nxg3+ as in A.3.

B.2) 43.Kf2 Nxc1+ as in A.2.

Apr-12-22  paavoh: I had the line 41. Rd2+ 42. Nxd2 Rxd2+ 43.Kg1 Ne2+ 44.Kf1 Nxc1, followed by 45. Ke1 Nd3+ 46. Kxd2 Nxb4 with a piece up. Quite straightforward although other lines win as well.
Apr-12-22  stacase: Way easier than yesterday 43...Ne2+ forking White's King and Rook was ever so sweet.
Apr-12-22  parch: 41...Rd2+ 42.N:d2 R:d2+ 43.Kg1 Ne2+ 44.Kf1 N:c1 picking up a piece, White can't win it back with 45.Rc4 because of ...Bb5

(45.Ke1 Ra2 46.Rc4 Nd3+ 47.Kf1 R:a1+ 48.Ke2 Be4)

45.Rb6 Bf3

Apr-12-22  JohnBoy: I’m w <saturn>, opting for 41…Rd1. Can someone plz give computer analysis of this?
Apr-12-22  mel gibson: <Apr-12-22 JohnBoy: I’m w <saturn>, opting for 41…Rd1. Can someone plz give computer analysis of this?>

White is busted:

Stockfish 14 says:

41... Rd1

(41. .. Rd1 42. Rxd1 (♖c1xd1
♖d8xd1 ♖b4-c4 ♗c6-f3 ♖c4-c7+ ♔f7-f6 ♔h2-g1 ♖d1-c1 ♖c7-a7 ♗f3-e2 ♔g1-f2 ♖c1xf1+ ♔f2-e3 ♗e2-c4 ♘a1-c2 ♖f1-f3+ ♔e3-d2 ♖f3-d3+ ♔d2-c1 ♘c3-e2+ ♔c1-b2 ♖d3-b3+ ♔b2-a1 ♖b3xg3 ♘c2-a3 ♗c4-e6 ♘a3-b5 ♘e2xf4 ♖a7-c7 ♘f4-d3 ♔a1-b1 ♗e6-b3 ♖c7-c1 ♔f6-e5 ♘b5-a7 ♘d3xc1 ♔b1-b2 ♗b3-d5 ♘a7-c8 ♘c1-d3+ ♔b2-c3 ♘d3-f4+ ♔c3-b4 ♔e5-f6 ♘c8-a7 ♖g3-h3 ♔b4-c5 ♗d5-e4 ♘a7-b5 ♖h3xh4) -16.19/33 622)

score for White -16.19 depth 33.

Apr-12-22  TheaN: <41....Rd2+ 42.Nxd2 (Kg1 Rg2+ -+) Rxd2+ 43.Kg1 Ne2+ -+> is simple enough, but with this much firepower on the White king it's kind of obvious something has to go wrong. Mind that though Black is somewhat uncoordinated after the combination, Na1 isn't much better off.
Apr-12-22
Premium Chessgames Member
  whiteshark: After <44.Kf1 Nxg3+ 45.Ke1 Re2+ 46.Kd1> I was loo♔ 4 some # which wasn't there.
Apr-12-22  Cheapo by the Dozen: White attempts to recover the lost material are perhaps more interesting than the puzzle itself. For example, there's a line in which White could try forking Black's minor minor pieces via Rc4. But in that line his king is at f1, and hence ... Bb5 is a fatal pin.
Apr-12-22  Hercdon: I too played Rc1

A knight on A1? Seriously??

Apr-12-22  johnnydeep: Dang. Got the first two (obvious) rook moves, but missed the knight fork, so I thought I was on the wrong track.
Apr-12-22  Halldor: I got the game line to the end, and my continuation was a kind of futile breakout try for the white king: 44 Kf2 Nxc1† 45 Ke3 Re2† 46 Kd4 Re4† — and now the rook on b4 is lost, either by 47 Kc5 Nd3† forking King and Rook, or by 47 Kc3 Na2† forking King and Rook as well.
Apr-12-22  TheaN: I'm actually not so convinced about 41....Rd1. You will have to see the continuation after 42.Rxd1 Rxd1 43.Rc4!


click for larger view

Black's idea, to mate along the back rank, fails here because of the pressure on Bc6. Having said that 43....Rxf1 44.Rxc6 Ne2 45.Nb3 (else Rxa1) Rf2+ 46.Kh1 Nxg3+ 47.Kg1 Rxf4 -+ White loses two pawns and the game, but it's not incredibly trivial per se.

The computer line after Rc4 is a bit farfetched imo. It keeps pressure on the knight on f1 indefinitely, but it's kind of tricky: 43....Bf3! 44.Rc7+ Kf6 45.Kg1:


click for larger view

45....Rc1! setting up Ne2+, 46.Ra7 Be2 -+ and now Nf1 falls. 45....Ne2+ 46.Kf2 Rxa1 -+ might be less significant but easier. But it's all a bit much in comparison to 41....Rd2+.

Apr-12-22  Andrew Chapman: I saw that Rxg3 wins a pawn and leaves black with a supported past pawn, and didn't look further. It's -2.3 according to an engine so at least it doesn't throw everything away.
Apr-12-22
Premium Chessgames Member
  gawain: If Black's winning line is just the win of a piece, then why not win the exchange with a simple knight fork. 41...Na2. I'll look again.
Apr-12-22
Premium Chessgames Member
  gawain: (The immediate fork does win but is not the best move.)

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