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Nicholas Pert vs Florian Dinger
Hastings (2007/08), Hastings ENG, rd 3, Dec-30
Queen's Indian Defense: Kasparov-Petrosian Variation. Petrosian Attack (E12)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Feb-15-17  Moszkowski012273: Wednesday material?
Feb-15-17
Premium Chessgames Member
  Phony Benoni: The eye is immediately drawn to the queen skewer on the 7th rank. Just for fun, let's look at 49.Qh7+.

Black has four responses, so let's get systematic here.

1)49....Kd6. Well, that's easy: 50.Rxe6+ and the Black queen's protection vanishes.

2) 49...Kd8. Now we'got a double attack with check by 50.Qg8+and either king move allows 51.Qxe6+ grabbing the rook next move.

3) 49...Ke8. Now it's 50.Rxe6+Kd8 51.Re8+, and the queen goes again.

4) 49..Kf8. Hmm. Can't check with the rook, and 50>Qg8+ is not available. Hmm.

Was this a waste of time? Not really Substitute <49.Qg7+> eliminating that pesky defense, and all is well.

Feb-15-17  Cheapo by the Dozen: I did it the other way around. First I noticed the pin; then I saw that the queen skewer limited Black's feasible responses.
Feb-15-17  Moszkowski012273: I think 43 White to play would of been a wee bit better.
Feb-15-17
Premium Chessgames Member
  Big Pawn: 19. Nf5 was such a nice way to play it. No weaking f3 move, no Bd3. He found a tactical solution.

if 19...Nxe4 then
20. Bxf6 Nxf6
21. Ne7+ Kh8
22. Nxc8

If 19...Bxe4 then
20. Bxf6 Bxf5
21. Be7 Re8
22. Bxe8.

If black tries to pin the bishop with

22...Re8 then
23. Bd6!

Feb-15-17  stst: W R is pinning the N, so 49.Qg7+ only allows three squares for the Black K to breathe: (A)....... Kd8
50.Qxf6+ Kc8
51.Qxe6+ Kb8
52.QxR and W is up material
(B).........Ke8
50.RxN Kd8
51.Qf8+ Kd7
52.Re7 pins K,Q and W exchanges up.
(C).............Kd6
50.RxN+ KxR
51.QxQ W up in material

Any other variations ,if exist, should still favors W.

Feb-15-17  saturn2: Black's threat is Rd1+
Qg7+ If the king walks to d6 RxN+ wins the queen. If the king goes to the back rank Qg8+ is a double attack on the rook.
Feb-15-17
Premium Chessgames Member
  agb2002: White has a pawn for a knight.

Black threatens Rd1+ and mate next.

White can resume the attack with 49.Qg7+:

A) 49... Kd6 50.Rxe6+ Kxe6 51.Qxc7 + - [Q+P vs R].

B) 49... Kd8 50.Qg8+

B.1) 50... Kd7 51.Qxe6+ Kd8 52.Qe8#.

B.2) 50... Ke7 51.Rxe6+ Kd7 52.Qe8#.

B.3) 50... Nf8 51.Qxf8+ Kd7 52.Re7+ and 53.Rxc7 + - [Q+P vs R].

C) 49... Ke8 50.Rxe6+ Kd8 51.Qf8+ Kd7 52.Qe8#.

Feb-15-17  Moszkowski012273: Actually 44....Kg8 instead of 44...Kg7 and black is doing just fine.
Feb-15-17  stacase: 49.Qg7+ Was there anything else to consider?
Feb-15-17  Olsonist: The pin and the skewer kinda stood out.
Feb-15-17  AlicesKnight: Another Black mating threat, so which check?

49.Qg7+ looks best. If ....Ke8 then 50.Rxe6+ will at least win Q for R. If ... Kd8 then 50.Qg8+ Kd7; 51.Qxe6+ Kd8; 52.Qe8# If 49 ... Kd6 then 50.Rxe6+ forces the K away from the Black Q allowing its capture. Let's see - OK, Black gave up at once.

Feb-15-17  The Kings Domain: Nice puzzle and good game. White's dominance in the center foretold an eventual win.
Feb-15-17  morfishine: <49.Qg7+> and White will regain the piece while snatching pawns winning

*****

Feb-15-17  NightKnight: Qg7+ followed by Qg8+ looks pretty good.
Feb-15-17  YetAnotherAmateur: First off, white must check or defend against 49. ... Rd1+ 50. Re1 Rxe1# That narrows our options considerably.

49. Qg7+ seems to be the right starting move, leaving black with few options.

<agb2002> helpfully wrote out all the lines I had worked out, so I won't repeat him/her.

Feb-15-17
Premium Chessgames Member
  patzer2: Found 49. Qg7+! for my Wednesday puzzle solution because I couldn't make 49. Qh7+ work.

Indeed, 49. Qh7+?, which is the second best move, actually loses after 49. Qh7+ Kf8 50. Qxc7 Nxc7 (-2.70 @ 21 depth, Deep Fritz 15.)

P.S.: For a Black improvement, instead of 44...Kg7? allowing 45. Rd4! (+4.22 @ 20 depth, Deep Fritz 15), 44... Kg8 gives Black a winning game after 44...Kg8 45. d6 Rxd6 46. Qg6+ Kf8 47. Qh6+ Ke8 48. Qg6+ Kd7 49. Rxd6+ Qxd6 50. h5 Ne6 51. h6 Nf8 52. Qg4+ Kd8 53. Qg7 Qe7 54. a4 Ke8 55. Kg1 a6 56. Kf1 b5 (-1.99 @ 20 depth, Deep Fritz 15.)

Feb-15-17
Premium Chessgames Member
  Jimfromprovidence: There is an interesting branch of the

49.Qg7+ Kd8 50.Qg8+ Nf8 line, below.


click for larger view

White also has 51 Qxd5+, seeing 51...Qd7 52 Qa8+ Qc8 53 Rd4+ Nd7 54 Rxd7+ Qxc8+ Kxc8.


click for larger view

Feb-15-17
Premium Chessgames Member
  whiteshark: <NightKnight: Qg7+ followed by Qg8+ looks pretty good.> My solution, too! ;)
Feb-15-17  YouRang: Wednesday 49.?


click for larger view

Black is up a N for a P, but black's N is pinned, and the Q and R are loose, as in "loose pieces drop off". Moreover, black's K is highly exposed to white's Q.

The correct move is the most obvious one: <49.Qg7+>


click for larger view

The skewer demands either 49...Kd8 or 49...Kd6 in order to save the queen. However...

- <49...Kd8> allows the Q+N fork: <50.Qg8+ Nf8> (not 50...Kd7? 51.Qxe6+ ~#) <51.Qxd5+> winning the R, with more to come:


click for larger view

Then 51...Qd7 (51...Nd7 52.Qg8+ ; 51...Kc8 52.Re8+ ) 52.Qa8+ Qc7 53.Re8+ .

~~~

- <49...Kd7> allows the removal-of-defenders: <50.Rxe6+>


click for larger view

Then 50...Kxe6 51.Qxc7

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