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Mikhael Mchedlishvili vs Sergey Volkov
13th Dubai Open (2011), Dubai UAE, rd 5, Apr-14
English Opening: King's English Variation. Kramnik-Shirov Counter (A21)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
May-24-11
Premium Chessgames Member
  patzer2: It's mate-in-five with 50. Bxf7+! to solve today's Tuesday puzzle.

This finishes off a won game in which White grabbed the advantage and slowly increased it after Black's awkward 16...Ra7? Better was 16...Nd7=.

With the deflection and double attack 18. Ba5 White wins a pawn with a clear advantage.

The winner's technique in pressing the pawn advantage is instructive. White found lots of winning opportunities, and I'm sure it was difficult choosing between them. For example, instead of 37. Qd8! , White also had 37. Qf4! .

May-24-11  maxfrank: Just for fun, I've been timing these lately, and note that today's puzzle took a lot longer than yesterday's. The solution wasn't harder to find (partly because a check looked necessary), but took longer to verify because the tree was denser. The psychology of the analysis procedure is interesting!
May-24-11  Everyone: got it!
May-24-11  Waitaka: <Once> That was brilliant!! And you can do a whole series of it, Fatastic!
May-24-11  CHESSTTCAMPS: White has the big advantages of 2 extra pawns, a mobile bishop versus a knight in a corner, and a cohesive attacking force converging on the king. It's time to put black out of his misery:

50.Bxf7+ diverts the only defender of g6 and forces mate.

A) 50... Nxf7 51.Qg6+ Kh8 52.Qh5+

Chess teachers sometimes have trouble explaining to beginners why some checks are useful (i.e. strengthen position / gain a tempo) and some are bad (weaken position / lose a tempo). It happens that in this case, white can get away with 52.Qxf7? and win without the intermezzo.

52... K any 53.Qxf7+ K any 54.Qh7#.

B) 50... Kg7/h7 51.Bc4+ Re7 52.Rxe7+ and mate in 2

May-24-11  Sharpen Your Tactics: <Once>
Your post reminds me about Basil Fawlty not mentioning the war.

http://www.youtube.com/watch?v=7xnN...

May-24-11  Patriot: <maxfrank> For me it was slightly harder than yesterday's problem. Yesterday I thought "Oh...Qg1+ Rxg1 (or Nxg1) Nf2 mate!" Pattern recognition solved it within 5 seconds or so. For today's problem I quickly noticed black may be threatening perpetual, so I thought "Qg6+ Nxg6, no... Rxf7 but black threatens perpetual so Bxf7+ Nxf7 Qg6+ Kh8 Qf6+ and capture the knight next with check leading to mate. So his best may be ...Kg7 or ...Kh7. On ...Kg7, Qf6+ leads to mate. After ...Kh7, Bc4+ looks really good and black will have to start tossing away pieces before being mated." I'm always preaching "Look at checks, captures, and threats in that order" but Rxf7 was at the top of my list. It's because I've seen so many tactics problems where in a bishop pin situation, many times it is correct to take with the rook. I would say the ~90,000 tactics problems I have practiced had a big influence here!
May-24-11  wetherulerz:


click for larger view

black to move and win..

May-24-11
Premium Chessgames Member
  kevin86: The trick here is to keep the "check train" rolling. If black is given a breath,the queen could force a perpetual check.

The "train" quickly leads to mate.

May-24-11  Marmot PFL: Same line as the game except 52 Qh5+ instead of Qf6+. Seems there have been several f7 or f2 sacrifices recently.
May-24-11  stst: 50.BxP+
IF (A) ...NxB,
51.Qg6+ Kh8 (if Kf8, 52.QxN#)
52.QxN Qe4 (if Rg8, 53.Qh8#)
53.Qg7#
IF (b)... KxB
51.Qf6#
In almost all cases, the Bk Q has no retreat to defend.
May-24-11  savuflorin1983: <wetherulerz> 1. ...Ba3 2.Kxa3 Nc4+ 3.bxc4 Ra5#
May-24-11  okba12: a weak and easy puzzle-shame
May-24-11  WhiteRook48: I love Tuesdays, just 50 Bxf7+ Nxf7 51 Qg6+ Kh8 52 Qf6+ Kg8 53 Qxf7+ easy
May-24-11  sevenseaman: You are White. Do you resign or do you mate in three? Its easier to resign though.


click for larger view

W in 3.

May-24-11  Patriot: <sevenseaman>

1.fxg7

A) 1...h6/h5 2.Nf6#

B) 1...Ne2+ 2.Kh2 Rf8 3.Nh6#

C) 1...Rf8 2.Nh6#

D) 1...b2 2.Nf6#

Line B is what makes this a "mate in 3" problem.

May-24-11  wals: Rybka 4 x 64

Game equal, 16.Be1, 0.27.

d 18 : 5 min :
Black error
16...Ra7,(not in first five) +0.87.
Best,
1. (0.27): 16...Nd6 17.Na5 Qc7 18.f3 Nd7 19.Bg3 Qxa5 20.Bxd6 bxc4 21.Qe1 Qxe1 22.Rfxe1 Ra7 23.Rac1

d 18 : 5 min :
Black error
33...Qc5,(not in first five),+6.48.
Best,

1. (2.71): 33...Qb4 34.Qc2 Qb6 35.Qb3 Qxb3 36.Rxb3 Rc5 37.Rd4 Nd7 38.Bxf7+ Kxf7 39.Rxd7+ Kf6 40.Kf2 a4 41.Rbb7 g5 42.Ke3 Ke6 43.Rg7 Kf6 44.Rbf7+ Ke6 45.Ra7 Kf6 46.Rh7

d White error
34.b3,(not in first five),+2.67.
Best,
1. (6.48): 34.Rd8 Qe5 35.Qf4 Rxd8[] 36.Qxe5 Rxe5 37.Rxd8+[] Kh7[] 38.Rxb8 Kg6 39.Rb6 Rc5 40.Bd5 Rc2+ 41.Kh3 Rd2 42.Bxc6 f6 43.Kg4 Rd4 44.Be8+ Kh7 45.Rb5 a4 46.Kf5 Rd8 47.Bg6+ Kh6

d 14 : 4 min :Black error
34...Rhe5,(2nd best),+5.11.
Best,
1. (2.67): 34...Qg5 35.Qxg5 Rxg5 36.f4 Rh5 37.Rc3 Rh8

d 19 : 7 min :
White error
37.Qd8,(2nd best) +4.36.
Best,
1. (5.44): 37.Qf4 Re7 38.Qh4 Rd7 39.Rh1 Rd2+

d 15 : 4 min :
White error
38.Qxa5,(not in first five)+3.54.
Best,
1. (4.36): 38.a4 Qf8 39.Qxa5 Nd7 40.Qf5[] Nf6 41.g4 Qb8 42.g5[] Re5 43.Qf4[] Nd5[] 44.Bxd5[] cxd5 45.Rxd5 f6 46.gxf6 gxf6 47.Qxf6 Rxd5[] 48.Qe6+ Kh8 49.Qxd5[] Qc7 50.a5 Qg7+ 51.Kf2 Qb2+ 52.Ke3[] Qc3+ 53.Kf4[]

d 18 : 6 min :
Black error
39...Qf8, (3rd best),+5.12.
Best,
1. (4.33): 39...Qb8 40.Qg5[] Qe5 41.Qxe5[] Nxe5 42.Rd8+ Kh7[] 43.Be2[] Ra7 44.Rd6 Rb7 45.f4 Nd7 46.a5 Ra7 47.b4 Nb8 48.e5 g6 49.Rd8 Na6 50.Bxa6 Rxa6 51.Rd6 Kg7 52.Kf3 Kg8 53.Ke3 Kg7 54.Ke4 Kf8

d White error
40.Qg5, (not in first five)+3.35.
Best,
1. (5.12): 40.Qf5 Nf6 41.g4 Ne8 42.Rh1[] g6 43.Qxg6+[] Qg7[] 44.Rh6[] Rc7 45.g5 Qxg6 46.Rxg6+ Kf8 47.Rh6[] Re7 48.a5 Re5 49.a6[] Rxg5+ 50.Kf2[] Ra5 51.Rxc6 Ra2+ 52.Ke3 Ra3 53.Rb6 Ke7 54.e5 Nc7 55.Ke4

Black, 42...Ng6, +6.80,
47...Qc5, +13.47, 49...Qe3+#5, ensured a win for White.

May-24-11  jrbleau: Once, if you put your posts together, you could put out a book a year!
May-24-11  Don Quijote: Once, once again you teleported me into a wold where only you can take me with your crazy histories

good job ;)

May-24-11  CHESSTTCAMPS: <.. It happens that in this case, white can get away with 52.Qxf7? and win without the intermezzo. ...>

Nobody called me on this claim, or perhaps nobody read it. In any case, it is very interesting to try to win from the puzzle position against Crafty Endgame Trainer using the line 50.Bf7+ Nxf7 51.Qg6+ Kh8 52.Qxf7(?)

Try to win after 52.Qxf7 using the following link:

http://www.chessvideos.tv/endgame-t...

May-24-11  sevenseaman: <Patriot> I salute you, a true chess aficionado.

<B) 1...Ne2+ 2.Kh2 Rf8 3.Nh6# > it is.

(2. can be Kh2 or Kf2.)

I admire your spirit. Hardly thought anyone would try. You inspire me!

May-24-11  TheBish: M Mchedlishvili vs S Volkov, 2011

White to play (50.?) "Easy"

White mates after 50. Bxf7+ Nxf7 (or 50...Kg7 51. Qf6+ Kh7 52. Bg6+ and mate next) 51. Qg6+ Kh8 52. Qh5+ (or 52. Qf6+) Kg7 53. Qxf7+ Kh6 54. Qh7#.

May-25-11  LIFE Master AJ: "Always check ... it might be mate."

Thus, 50.BxP/f7+, ('!') and White - even though he has the sword of Damocles hanging over his own head - mates first ... and does it all with check.

May-25-11  LIFE Master AJ: Nice game, well-played finish. (Black - two Pawns down - could not willing acquiesce to any exchange of Queens.)
May-25-11  wetherulerz: <okba12> was that taunt meant for me or the daily puzzle?
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