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Tea Bosboom-Lanchava vs Maria Kursova
European Individual Championship (Women) (2007), Dresden GER, rd 7, Apr-09
English Opening: Symmetrical. Anti-Benoni Variation Spielmann Defense (A33)  ·  1-0


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sac: 40.Qxe3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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  lost in space: ahhh, my loved Monday!

40. Qxe3 Nxe3 41. Ne7+ and we have the king of the royal fork.

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Oct-03-11  zb2cr: 40. Qxe3 sets up the fork at e7. White wins at least the exchange.
Premium Chessgames Member
  whiteshark: quite accommodating
Oct-03-11  Dyonis: Qxe3 ... wins... But...maybe the best Black's answer is 40. ... Rxc7 This way the game could continue little bit more...
Oct-03-11  Elrathia Kingi: I think black can force a draw with 39...Rxg3 40.hxg3 Qxg3 41.Kf1 Qf3, and the position is forced to repeat, as 42.Ke1 allows Re8+ 43.Ne7+ Rxe7+ 44.Qxe7 Qf2#. I didn't check that on a board, so it might be wrong..
Oct-03-11  sevenseaman: <Elrathia Kingi> You are quite right. Its a draw by repetition and White loses if he erroneously plays 42. Ke1.

Black wins if he plays 39...Qxc7 rather than 39...Qxf5. (see my earlier comment).

Oct-03-11  pogotheclown: Maybe black was having an off day because her play doesn't reflect her rating. White was allowed to build up a significant spatial advantage and black just shuffled pieces around until white decided to convert her advantage.
Oct-03-11  Dr. J:

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<sevenseaman> and <Once> like 39...Qc7, justifiably. But 39...Rxg3+ might be even better.

Oct-03-11  sevenseaman: <Dr.J> 39...Rxg3 isn't better than 39...Qxc7 but against best play it gets you a draw by repetition and a win only if White emulates <Kursova> and defends poorly. (see <Elrathia Kingi>'s comment).
Premium Chessgames Member
  NM JRousselle: What was the clock situation? Black missed the fairly obvious 39 Rg3.
Oct-03-11  Patriot: 40...Qf2+ 41.Kh1 Qxh2# is threatened so white needs to defend or go for the throat. It's better to look at the throat first, so Ne7+ or Qxe3...

40.Ne7+ Rxe7 41.Qxe7 Qf2+

40.Qxe3 Nxe3 41.Ne7+ Kf8 42.Nxf5 wins the exchange or 42.Nxd1 Rxd1 wins a piece.

Oct-03-11  Dr. J: <sevenseaman: <Dr.J> 39...Rxg3 isn't better than 39...Qxc7 but against best play it gets you a draw by repetition and a win only if White emulates <Kursova> and defends poorly. (see <Elrathia Kingi>'s comment).>

I'm not sure, but 39...Rxg3+ 40 hxg3 Qxg3+ 41 Kf1 Re8 looks promising (e.g., 42 Ne7+ Rxe7?!)

Oct-03-11  Fezzik: At first I was surprised that Black, a +2300 player, would continue after 40.Qe3. But then I noticed the move number.

The two players were almost certainly in time trouble when this position arose.

Oct-03-11  jackalope: <sevenseaman> after 39... Qxc7 40. Qxd5 Qb6 gives Black a fighting chance doesn't it?
Premium Chessgames Member
  kevin86: A good Monday problem-white sacs the queen,regains is by a fork,and ends up an exchange ahead.
Oct-03-11  sevenseaman: <Dr.J>May be yes or no, not very sure. I have tried 3-4 times against Crafty. It concedes a draw by repetition in about 10 moves.

<jackalope> Yes, with <39. Qxc7> Black wins.

Oct-03-11  meppi: i normally do not read the other kibberters of this website but i would like to congratulate you all on your good efforts very thorough analysis of this puzzle! I agree my hypothesis is the attack is involving a fork of the D and K using S. if i learn anything from this puzzle it is that one piece cannot be standing on two squares at once that would be illegal sometimes the best move is a sacrifice involving this fact! but it is not always as obvious as it is here, the most famous Rubenstein game is also a beautiful example!
Oct-03-11  M.Hassan: "Very easy" White to play 40.?
Sides are equal.
If it were Black's move, he could checkmate by <1.....Qf2+ 2.Kh1 Qxh2#> because the dangered f2 square is not supported. So White can start by:

40.Qxe3 Nxe3
41.Ne7+ Kf8
42.Nxf5 Nxd1
White eliminates the danger and is up in materials.
This must be it.

Oct-03-11  Nullifidian: Like most people, I dare say, I initially considered the direct 40. ♘e7+, but this loses to ♖xe7 and if White is stupid enough to try to win the exchange with ♕xe7?? then it's mate in 2 for Black.

So that's obviously not the way, but it has the germ of the right idea. What else can White do?

40. ♕xe3! ♘xe3 41. ♘e7+ ♔h7 42. ♘xf5 ♘xf5, winning the exchange. Black might also try the simpler 40... ♖xc7, which relieves some of the danger of that advanced pawn and leaves a great many pieces yet to defend Black's position, but then White can just respond by moving the queen off the e3 square, say by ♕e2.

Premium Chessgames Member
  fm avari viraf: At first glance, it struck me that 40.Ne7+ was a winning move but soon realised that after 40...Rxe7 41.Qxe7 & Black mates in two with 41...Qf2+ 42.Kh1 Qxh2#
Premium Chessgames Member
  fm avari viraf: So first 40.Qxe3 Nxe3 & 41.Ne7+ brings the curtain down!
Oct-03-11  jeremy24: Kudos to gofer for finding the most direct Nd6 (not RxN), a real sting in the tail of an already convincing line.
Oct-03-11  Mr.Zurvan: My first post (Iím new to the site) and great analysis by everyone. Black does make a critical error on move 39. by taking the F pawn and not the C pawn. If 39. Qxc7, play might have gone on something like:

40. Qd4-Rxg3+
41. Kh1-Rc3
42. Qxg4-Qxc6
43. Rxc3-Qxc3
44. Qg2-Rc5

From this standpoint, black seems to have a dominate position.

Oct-03-11  Sularus: the knight fork is obvious. but the "forking square" (i just made that up :D) is guarded. ergo...
Oct-04-11  Thumbtack2007: I agree that time pressure must have been to blame for Black's 39 .. Qxf5 blunder which throws away a winning position; I also agree that 39 .. Qxc7 is far superior and that if Black had played it, she would have won the game.

It also seems to me that the game was about even after the 25th move. How did White get in so much trouble by the 39th move that only Black's blunder could save her game?

There is no one White move that seems to be that bad! My best efforts led me to conclude that 27. Qe2 and especially 28. f5 were the problem, and that White should have played 27. b5 instead, which would have kept the game close to even.

Anyone else have any comments on where White went astray?

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