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Wei Yi vs Anne Haast
"Wei to Go!" (game of the day Feb-02-2015)
Tata Steel Challengers (2015), Wijk aan Zee NED, rd 12, Jan-24
Sicilian Defense: Paulsen. Bastrikov Variation (B48)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 5 OF 5 ·  Later Kibitzing>
Mar-16-16  Prosperus: I've found only 25. Qxe5+ Qe6 26. Nd5+ Ke8 27. Nc7+ Rxc7 28. Qxc7
Mar-16-16
Premium Chessgames Member
  perfidious: Sporting of Black to allow the mate in the game, rather than the prosaic 25....Kxd8 26.Qxc6 which is also easy.
Mar-16-16
Premium Chessgames Member
  gofer: Hmmm, I like the look of...

<25 Qxe5+ Qe6>
<26 Nd5+ Ke8>
<27 Qxh8 >


click for larger view

Black has almost no moves!

Ke8 and Bf8 can't move. Rook moves either lose the queen or lose the rook (or both!). Pawn moves allow Nc7+ winning an exchange!

There are no good queen moves...

27 ... Qg5/Qxe5/Qd6 28 Nf6+

27 ... Qh6 28 Nf6+ Ke7 29 Ng8+

27 ... Qf6 28 Nxf6+

27 ... Qe5 28 Qxe5+

27 ... Qg6
28 Nxf6+ Ke7
29 Bc5+ d6 (Ke6 Qxf8 )
30 Bd6+ Ke6 (Kd8 Qxf8#)
31 Bxf8

27 ... Qc6
28 Qe5+ Qe6
29 Nc7+ Rxc7
30 Qxc7 f6
31 Qc8+!

~~~

Doh! I am with <diagonalley> and <dfcx>.

<25 Bd8+!!! is just beautiful!>, but I totally missed it...

Mar-16-16  morfishine: <gofer> I'm a bit surprised, this is such a famous game, probably too famous to use positions for puzzles
Mar-16-16
Premium Chessgames Member
  gofer: <morfishine:> Yep.

It may be famous for those that follow all the famous chess games, but I must confess that my chess knowledge is probably only 1% of the regulars on this site.

I am slowly getting more, but I have a huge amount to catch up and I only come across games through POTD and GOTD on this website and Ray Keene's column in the Times (once or twice a week)... ...so I am probably fighting a losing battle, but one that I am happy to continue fighting...

:-)

Mar-16-16  Razgriz: If...
26. .... Kxd8
27. Qxc6 Ke7
28. Qxb7 Kxf6
29. Qxa6+ King goes somewhere
30. Qxb5

White wins 2 pawns, a queen, and a rook for a Knight and a Bishop. I don't know if that continuation is good enough for White but imo it's pretty decent and white will be able to win with decent play. Queen and Rook >> Bishop and Rook End game.

Mar-16-16  CHESSTTCAMPS: White is down a knight for a rook, but wins outright after the forcing 25.Qxe5+ Qe6 26.Nd5+ Ke8 27.Qxh8:

A.27...Rxb6 28.Nc7+ Ke7 29.Nxe6 wins (Q for B)

B.27... d6 28.Nc7+ Rxc7 29.Bxc7 wins (+R)

C.27... Qh6 28.Qe5+ Qe6 29.Nc7+ Rxc7 30.Bxc7 (+R)

D.27... other 28.Bc5 d6 29.Nf6+ wins additional material.

Too clever is 26.Rxd7+? Rxd7 27.Bc5+ Rd6 (Kd8?? 28.Qb8#) 28.Nd5+ Kd8.

Mar-16-16  CHESSTTCAMPS: A number of us were fooled.
Mar-16-16  Eusebius: Wonderful !!
Mar-16-16  Rama: I liked 25. Qxc6 dxc6, 26. Bd8+ Ke6, 27. Rd6# except it isn't mate is it?!
Mar-16-16  1.e4effort: Well, this is just a crazy game - for a while I thought it was a couple of beginners - some of the moves make no sense to me. But then the surprising mate! I can see why this is a famous game - although like <gofer> I don't really know zillions of games nor can I call any particular game to mind; as many of you all can. I'm too old. Still, I love chess
Mar-16-16  YetAnotherAmateur: My line, which seemed to work:
25. Qxe5+ Qe6 (forced)
26. Bc5+

A) 26. ... d6
27. Bxd6+ Kd8 (forced)
28. Bc7+ Kc8 (still forced)
29. Rd8#

The trouble is, there's also this:
B) 26. ... Kd8
27. Rxd7+ Kc8 (Rxd7? Qb8#)
and now the best I can see left is trading down with 28. Qxe6 to end up with a N+2P vs R endgame.

Mar-16-16
Premium Chessgames Member
  kevin86: White sneaks in the back door and black walks into immediately mate.
Mar-16-16
Premium Chessgames Member
  gawain: What an excellent puzzle!

Persistence paid off for me.

25 Bd8+ is a nice forcing move. The bishop protects the knight, and Black cannot capture the bishop on pain of losing his queen. (Because of the pin on the d-pawn.) So 25...Ke6. Then I tried Qb3 which is almost checkmate. Almost--but Black can block this with ...Qc4. Keep looking.... Aha! 26 Qh3#.

The mating net is delightful.

Mar-16-16
Premium Chessgames Member
  maxi: A remarkable game!
Mar-16-16
Premium Chessgames Member
  patzer2: For my Wednesday solution, I found 25. Bd8+! easy enough. However, I was half asleep when I tackled the problem (25. ?) this morning and somehow imagined there was an extra White Rook on h1.

So after I saw the response 25...Ke6, I immediately went for 26. Qxc6?? which leaves White the exchange down in a clearly lost position.

After 25...Ke6, correct of course is Queen to the corner pocket and mate with 26. Qh3#.

Black's clearly decisive mistake was 21...Rb8?, which allows 22. Nd5! (+10.17 @ 28 depth, Stockfish 7).

Instead, 21...Qxh3 22. gxh3 (+1.43 @ 39 depth, Stockfish 261114) gives Black practical drawing chances.

Earlier, instead of 16...Rc8? which allows 17. f6 to (+1.54 @ 31 depth, Stockfish 6), Black could have held held it level with 16...Nf6 = (0.00 @ 28 depth, Stockfish 6).

After the positional exchange sacrifice combination 17. f6! Nxf6 18. Rxf6! (+1.39 @ 31 depth, Komodo 9.02), White has a strong advantage and Black is fighting for drawing chances.

Mar-16-16  Kwesi: This was still too fresh in the memory for me so I remembered the sequence very quickly.
Mar-16-16  yadasampati: Beautiful finish! Qh3# comes quite unexpected :-)
Mar-16-16  stst: The configuration is just right for a White B-hook, Bd8+, where the Black K has only two possible moves to make: either (A) KxB or (B) Ke6

(A) ==> RxP+ and K moves, QxQ ===> Q lost
or, if QxR or RxR, NxQ or QxQ==> also Q lost

(B) ==> White Qh3#, for no escape sq. left.

Mar-16-16  Grnhorn: what about:
25 Qxe5+ Qe6
26 Nd5+ Ke8
27 Nc7+ Rxc7
28 Qxc7 ?
does black have a move against?
29 Qc8 or 29 Qd8??
Mar-16-16  RandomVisitor: Curiously, the tactical shot 17.f6 does not work one move earlier: 16. f6? Nxf6 17. Rxf6 gxf6 18. Bb6 Bh6+ or 18...Qc8. It seems Kb1 and Rc8 were both critical to make the tactics of the move sequence work.
Mar-16-16
Premium Chessgames Member
  Bubo bubo: Missed this one too :-(
After calculating 25.Qxe5+ etc. I did not look for something better - maybe I somehow expected the point of the puzzle to be the avoidance of 25.Rxd7+ Rxd7 26.Qxc6?? Rd1#.
Mar-18-16  chessamateur: Very entertaining tactical flurry at the end of the game.
Oct-12-17  clement41: 22...Qh3 triggers #6 and no doubt Wei Yi saw it till the end. Under OTB conditions white must have nerves and trust his calcs.

22...Qh3?? 23 Nc7 Ke7 24 Bc5 d6 25 Rd6! (25 Bd6?? Kd7 and mate prospects are gone) and here white had to carefully check that black has no avoiding the mate (e.g., 25...Qe3 26 Rd4#; 25...Qa3 26 ba; 25...f6 26 Nd5 Ke8 27 Rd8 Rd8 28 Nf6# or 27 Nf6 Ke7 28 Ra6#; 25...Bh6 [vacating f8] 26 Rd8# etc.).

Just for fun, some nice stuff in the event of 22...Qh3 23 Nc7 Ke7 24 Nd5 Ke6?! [putting black's king in a net] 25 Nd8!! Rd8 26 Bd8 [white leaves the Qh3 en prise because his mate threat takes precedence] Bd6 [only move] 27 Rf1 f5 [and now is time for] 28 gh +-

Mar-29-18  Justin796: A fun game but black allows this sort of stuff to happen with poor development.
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