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Florin Gheorghiu vs Liu Wenzhe
Chess Olympiad (1982), Lucerne SUI, rd 5, Nov-04
Benoni Defense: Knight's Tour Variation (A61)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
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Aug-24-09
Premium Chessgames Member
  agb2002: White has 2B+2P for one rook and threatens 25.Qxg4+. However, the position of the white king suggests the possibility of a back rank check with either the rook or the queen. The rook check goes nowhere (24... Re1+ 25.Kxe1 Qg1+ 26.Kd2 Qxf2+ 27.Kc3, etc.) but the queen check mates in two: 24... Qg1+ 25.Kxg1 Re1#.
Aug-24-09
Premium Chessgames Member
  Once: The finishing position shows knights at their best and worst:


click for larger view

The white knight is worse than useless. If it could move diagonally like a bishop, it could snaffle the Re1. If it could move like a rook, it could defend with Nf1. And if it wasn't there, the white king could escape to f2. Clumsy beast.

The black knight is doing an excellent job. It simultaneously attacks f2 and h2, so creating a back rank mate. Nimble beast.

I suppose the moral is that knights are medium range pieces. They cannot sweep from one end of the board like the long range queen, rook and bishop. Nor are they very good at short range operations - a badly placed knight can be beaten by lowly passed pawn.


click for larger view

The black pawn queens, whether it is white or black to move.

You can even pepper the board with illegal white knights and get the same effect. White to move and be unable to stop the black pawn from queening.


click for larger view

But stick a knight on the fourth or fifth ranks in a middle game and it can come alive - as in today's fun puzzle.

Aug-24-09
Premium Chessgames Member
  whiteshark: 24...Qg1+!; it's like a backrank mate after 25.Kxg1 Re1#
Aug-24-09  nuwanda: <Once...You can even pepper the board with illegal white knights and get the same effect. White to move and be unable to stop the black pawn from queening.


click for larger view

>

nice position...

your right that black cant be hindered in queening, but that doesnt help him anyway...

its mate in 8 if white is to move, and if black moves mate in 12 (or something)

...

Aug-24-09  zb2cr: 24. ... Qg1+ forces the White King to capture--and he can then be mated on the back rank by 25. ... Re!#.
Aug-24-09  remolino: 24...Qg1+ of course. I love Mondays, no holes in my analysis
Aug-24-09  birthtimes: Liu Wenzhe has written a very informative and interesting book entitled, "The Chinese School of Chess: The unique approach, training methods and secrets."
Aug-24-09
Premium Chessgames Member
  johnlspouge: Monday (Very Easy):

Gheorghiu vs Liu Wenzhe, 1982 (24…?)

Black to play and win.

Material: R for 2B+P. The White Kf8 is stalemated, suggesting that the candidate is a check. Forward examination from checks yields a forcing variation: no further analysis is required.

Candidates (22…): Qg1+

22…Qg1+ 23.Kxg1 Re1#

Aug-24-09  ZUGZWANG67: 24. ...Qg1+ 25.Kxg1 Re1 is mate.
Aug-24-09  Patriot: 24...Qg1+ 25.Kxg1 Re1# pretty much does it.

At first I looked at Re1+, Qh1+, Ne3+, and Nxf2 without noticing the immediate Qg1+.

Aug-24-09  Athamas: Took me longer than usual for a Monday even after noticing a back rank mate was in order with the knight filling the hole on h2 and the rook ready to finish the game after Qg1+
Aug-24-09  PinnedPiece: Monday puzzle goal: Solve in 30 seconds

Performance: Spent a long time on knight moves. Finally looked at queen sacs. Spotted 24.Qg1+ at 45 sec into my analysis. Knew that this was the game winning move. Unfortunately, in my little world, this realization came after my flag fell and I had lost on time.

Result: Fail

Aug-24-09  awfulhangover: I got it, but it took me much longer than other Monday puzzles. I dare not tell you the silly moves I calculated.
Aug-24-09
Premium Chessgames Member
  doubledrooks: White pays the price for never developing his dark-squared bishop with 24...Qg1+ 25. Kxg1 Re1#
Aug-24-09  gallard: A number of comments about White laying the trap...I doubt it since he could have made the Queen move on the prior move #23 instead of h4!!
Aug-24-09  Summerfruit: White has 2B + P for R.

24...Qg1+ 25.Kxg1 Re1#

Aug-24-09  jfshade: <gallard: A number of comments about White laying the trap...I doubt it since he could have made the Queen move on the prior move #23 instead of h4!!>

No - getting the white Queen off the a6-f1 diagonal is the key here. If 23...Qg1+, then

24. Kxg1 Re1+
25. Qf1 Rxf1+
26. Kxf1
and black is down 2 pieces.

Aug-24-09  wals: [Event "Lucerne Olympiad"]
[Site "?"]
[Date "1982.??.??"]
[Round "?"]
[White "Florin Gheorghiu"]
[Black "Liu Wenzhe"]
[Result "0-1"]
[ECO "A77"]
[Annotator "Rybka 3 1-cpu (30m)"]
[PlyCount "48"]]

A77: Modern ♗enoni: Classical: 9...♖e8 10 ♘d2: 10...a6 and 10...♘bd7

1. d4
Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 Nbd7 8. e4 Bg7 9. Be2 O-O 10. O-O White castles and improves king safety (10. a4 Re8 ) 10... Re8 (10... Qe7 11. f4 ) 11. a4 ♗lack has a cramped position. ♗lack's piece can't move: c8 (11. Qc2 Nb6 ) 11... Ne5 (11... Bh6 12. Qc2 ) 12. Re1 ( 12. h3 a6 ) 12... a6 White has an active position (12... Bg4 13. f3 Bd7 14. f4 ) 13. f4 White threatens to win material: f4xe5 (13. h3 Rb8 ) 13... Neg4 (13... Ned7 14. Bf3 ) 14. Bf3 h5 (14... Nh6 15. h3 Nd7 16. Nc4 ) 15. Nc4 (15. h3 Nd7 16. Bxg4 Bd4+ 17. Kh1 hxg4 18. Qxg4 Nf6 ) 15... Nxe4 Sacrifices material 16. Rxe4 (Less advisable is 16. Nxe4 Bd4+ 17. Ne3 Bf5 ) (16. Bxe4 Qh4 17. h3 Bd4+ 18. Be3 Nxe3 19. Nxe3 Bxc3 20. bxc3 Rxe4 ) 16... Bd4+ 17. Rxd4 cxd4 ♗lack has a new passed pawn: d4 18. Ne4 White threatens to win material: ♘e4xd6 Qh4 ♗lack threatens to win material: ♕h4xh2 19. Ncxd6 Qxh2+ 20. Kf1 Bf5 21. Nxf5 (21. Qxd4 Bxe4 22. Nxe4 f5 ) 21... gxf5 (21... Rxe4 22. Nh6+ Nxh6 23. Bxe4 Re8 24. Qxd4 Qh1+ 25. Qg1 Qxg1+ 26. Kxg1 Rxe4 ) 22. Nf2 d3 (22... Re3 is the best option ♗lack has) 23. Qxd3 h4 ? dubious (23... Qg3 would keep ♗lack in the game 24. Bxg4 Qxd3+ 25. Nxd3 hxg4 ) 24. Qxf5 ?? BLUNDER an unfortunate move that relinquishes the win (24. Bd2 and White has triumphed Qg3 25. Bxg4 Qxd3+ 26. Nxd3 fxg4 27. Ne5 ) 24... Qg1+ Decoy: g1 (24... Qg1+ 25. Kxg1 Re1#) 0.1

The above may be of interest to those seeking help.

Aug-24-09
Premium Chessgames Member
  FSR: 24...Qg1+ leaves Black with an extra king.
Aug-24-09
Premium Chessgames Member
  FSR: This is an astonishing swindle to pull off against a world-class grandmaster. See http://en.wikipedia.org/wiki/Florin...
Aug-24-09
Premium Chessgames Member
  FSR: <Once> An even funnier position is White Kd2, Nb2; Black Kh8 Pa3. Black's pawn is still two moves away from queening, and White's king is within the square, but White loses BECAUSE he has a knight. The knight is helpless to stop the pawn, and 1.Kc3 (Kc2, Kc1) is met by 1...a2! and the stupid knight blocks White from catching the pawn with 2.Kb2.
Aug-24-09  WhiteRook48: what the...?
Aug-25-09
Premium Chessgames Member
  Once: <FSR>

Like it! Here is the diagram for your position:


click for larger view

Aug-25-09
Premium Chessgames Member
  kevin86: The winning move in ONCE's puzzle is a2!!!

Here black sacs queen in first move and mates in second;typical Monday puzz

Aug-25-09  LIFE Master AJ: This was a fairly simple win, I once did something similar in a tournament game ...
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