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Leinier Dominguez Perez vs Erling Mortensen
Politiken Cup 24th (2002), Copenhagen, rd 10, Jul-15
Sicilian Defense: Paulsen. Bastrikov Variation English Attack (B48)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jul-06-05  JohnBoy: If black had played 25...Nxg6, I believe white gets a very strong attack after 26.Qh2. Black probably had to play 26...Nf8 to avoid 27.Bxg7. White plays 27.Bh3 and 28.Rdg1 - I am doing this w/o board, but would rather be white than black. By a long shot.
Feb-01-15
Premium Chessgames Member
  al wazir: I got the first three moves in a flash (easy; white doesn't even have to give up any material), and I'm pretty sure I would have found 31. Rd7 too OTB.
Feb-01-15  sorokahdeen: Fascinating.

The type of combination spoke to me and I got all the way to the lateral defence against mate with 30...g5. 31 Qxe8+ Kh7 and found myself stuck having completely missed the exceedingly painful, 32 Rd7 .

I'm happy to have gotten as far as I did.

Feb-01-15  TheBish: L Dominguez vs E Mortensen, 2002

White to play (27.?) "Insane"

White wins with 27. Bxe5! dxe5 28. Rh8+!! Kxh8 29. Qf7 g5 (to stop mate with 30. Rh1+ Rh6) 30. Qxe8+ Kh7 31. Rd7 and White wins a piece.

Easiest Sunday puzzle in a long time!

Feb-01-15  M.Hassan: "Insane"
White to play 27.?
White is a pawn down.

I realized that White could have a chance of success if he can sit his Queen in f7 square that is presently guarded by the King and the Knight on e5 so, taking the Knight eliminates one of the defenders:

27.Bxe5
A) 27...........dxe5
28.Rh8+ Kxh8(forced)
29.Qf7 Rf6
30.Rh1#
In the game line clever move of 29...e5 saves Black from mate but ultimately loosing material.

B)If Black refrains from taking the Knight:
27..........Bf6
28.Bxd6 Rxd6
29.Qxd6 Qxd6
30.Rxd6 Rxd4
In this line, White becomes ahead by a Rook for a pawn 1-0

Feb-01-15  fisayo123: Pretty tame for a Sunday puzzle.
Feb-01-15
Premium Chessgames Member
  diagonalley: excellent puzzle, though hardly "insane"... but sadly, too tough for <diagonallley> ... nul points :-(
Feb-01-15  hadi706: 27. Bxe5! dxe5 28. Rh8+!! Kxh8 29. Qf7 g5 (to stop mate with 30. Rh1+ Rh6) 30. Qxe8+ Kh7 31. Rd7
Feb-01-15  Cheapo by the Dozen: If White's d1 rook were instead at f1, then Qh2 would offer a quick win. ... Nf7 would fail to Qh7+/Qg7#, while ... Bf6 is undone by Rxf6/Qh8+/Qh7+ skewering king and queen. As matters stand, however, Black can defend against the Qh2/Rdf1 plan in one (and I believe only one) way, namely with ... Bf6/Kf7 in some order.

So I'll go instead with 27 Nd3. Both Nxb4 and Nxe5 look like viable threats to improve White's position, so Black would like to play 27 ... Nxd3. I'll then go with 28 Qh2, and Black has to go with ... Bf6/Kf7 in some order for the reasons outlined above. Qh7+/Bxf6 is then embarrassing for Black, because gxf6 allows the 7th rank queen skewer, while ... Kxf6 allows a king hunt that has to succeed unless Black allows a winning queen or rook skewer on the 7th rank.

I'll just post this, without analyzing all the myriad lines to completion. My non-forcing solutions usually turn out to be wrong.

Feb-01-15  Cheapo by the Dozen: What <diagonalley> said.
Feb-01-15
Premium Chessgames Member
  agb2002: White is one pawn down.

The first idea that comes to mind is 27.Bxe5, to remove the defender of the f7 square:

A) 27... dxe5 28.Rh8+ Kxh8 29.Qf7 (threatens 30.Rh8+ Bh4 31.Rxh4# and 30.Qxe8+ Kh7 31.Rd7)

A.1) 29... g5 (enabling 30... Rh6) 30.Qxe8+ Kh7 31.Rd7 Qc6 32.Qxe7 Qf6 33.Qxf6 Rxf6 34.Re7 and White has a won ending.

A.2) 29... Qd8 30.Rxd8 Rxd8 (30... Bxd8 31.Qxe8+ Kh7 32.Qxd8 is a massacre) 31.Qxe7 Rd1 32.Qxe5 (32.Qh4+ Kg8 33.Qg4 Rad6 doesn't achieve much; 32.c3 b3 33.axb3 axb3 34.Qxe5 Ra1+ 35.Kxa1 Rxc1#) 32... Rf6 33.Qb8+ Kh7 34.Qxb4 Rff1 35.b3 Rxc1+ (35... a3 36.Qxa3 Rxc1+ 37.Qxc1 Rxc1+ 38.Kxc1 wins the pawn ending) 36.Kb2 Rb1+ 37.Kc3 axb3 38.axb3 with a complex ending where the material is more or less balanced but White has three passed pawns.

B) 27... g5 28.Rh8+ Kxh8 29.Qf7

B.1) 29... Rg8 30.Qh5+ Rh6 31.Qxh6#.

B.2) 29... dxe5 30.Qxe8+ Kh7 31.Rd7 transposes to A.1.

Feb-01-15
Premium Chessgames Member
  patzer2: Referencing my post about 29...Qd8 from 2005: Computer Chess programs, including my slightly dated version of Fritz, have gotten stronger over the last 10 years.

After 29... Qd8 30. Rxd8 Rxd8 31. Qxe7 Rd1 (diagram below)


click for larger view

Fritz 12 finds 32. c3! (perhaps the most difficult move in today's Sunday puzzle follow up) which appears to be clearly decisive, as strong play might go 32... bxc3 33. Qxe5 cxb2 34. Kxb2 Rb6+ 35. Kc2 Rd8 36. Qc3 g5 37. Nd3 Rh6 38. Qc7 Rdd6 39. Qc8+ Kh7 40. Qf5+ Kg8 41. Nb4 .

P.S.: Today's 28. Rh8+! Sunday puzzle solution is great for teaching basic tactics:

<28. Rh8+! Kxh8> Decoy forcing the King to h8.

<29. Qf7> Double Attack threatening the loose Rook on e8 and Mate.

<29...g5 30. Qxe8+ Kh7 31. Rd7> Double attack and overloading of pieces wins decisive material.

Feb-01-15
Premium Chessgames Member
  Sally Simpson: I'm just about to settle down and watch the Rangers v Celtic game so it was mistake to look at this just before the game starts.


click for larger view

Like the other lad's post I saw the Rh8+ and Qxg7 mate first.

1.Rd3 (threatening Rh3) 1...Nxd3 2.Rh8+


click for larger view

2...Kxh8 3.Qh6+ Mate on g7.

Far too easy for a Sunday and Nxd3 is not forced. But I've I pulled that trick off with Rh8+ and Qxg7 mate at least three times OTB so I'd play Rd3 that and live withe consequences.

It's Kick off.

Feb-01-15
Premium Chessgames Member
  Penguincw: I got the (basically) pointless Rh8+.
Feb-01-15
Premium Chessgames Member
  CHESSTTCAMPS: Black is up a doubled pawn, but the castled position is weakened by two corridors of entry which are controlled by white major pieces that trap the black king on g8. Usually such weaknesses are fatal if there is enough attacking material to exploit it. There is, and white does have a forcing, winning combination:

27.Bxe5! is the prosaic start, eliminating the f7 defender. White needs to act before black drives the Q off the f-file with 27... Rf8.

A. 27... Rf8? (too late!) 28.Rh8+! Kxh8 29.Qh6+ Kg8 30.Qxg7#

B. 27... dxe5 28.Rxh8+! Kxh8 29.Qf7! wins decisive material by threatening the edge mate Rh1

B.1 29... Qd8 30.Rxd8 Rxd8 (Bxd8 31.Qxe8+ Kh7 32.Qxd8) 31.Qxe7 R6d6 (to prevent Qxb5) 32.Qxe5 Rd1 33.Qe7! (threatening Qxb4 and preventing black from doubling rooks on the first) R8d4 34.c3! bc 35.bc R4d2 36.Qe8+ Kh7 37.Qxa4 and white has eliminated the back rank mate threats and has a massive advantage of Q+N+3 passed pawns for two over-burdened rooks.

B.1.1 33... R8d2 34.Qxb4 Re2 35.Qxa4 R2d1 36 b4 Rxc1+ 37.Kb2 and white's Q+3 passed pawns will beat the rooks. (e.g. 37... Rxe4 38.Qa8+ wins immediately).

B.2 29... Bh4 30.Qxc7 and white has Q+N for R+B.

C. 27... g5 28.Rh8+ (again!) and black can't defend the dual threats of 29.Rh1# and 29.Qxg7#

D. 27... other 28.Rh1(+/#) forces mate

The main problem I had with this one was the retained image of the d6 pawn and for a while I thought that 29... Qd8 held.

Time for review....

Feb-01-15
Premium Chessgames Member
  watwinc: Why doesn’t Black play 16 f4 Nf3?
Feb-01-15
Premium Chessgames Member
  CHESSTTCAMPS: Missed the 29... g5 defense - still had that phantom pawn on d6! As for the complex 29... Qd8 lines presented by <patzer2>, the computer analysis takes a very different direction from mine, but I did find d3 in a different context. A practical test against Crafty would be worthwhile.
Feb-01-15  BOSTER: What if after 27.Bxe5 Rc8 in between move.
Now if 28.Bxg7 Qxc2+ 29.Ka1 Qc4.

Certainly, white has the piece vs pawn, but white king is not in the safe pos.

Feb-01-15
Premium Chessgames Member
  Sastre: <BOSTER: What if after 27.Bxe5 Rc8 in between move>

27.Bxe5 Rc8 28.Rh8+ Kxh8 29.Qh6+ Kg8 30.Qxg7#.

Feb-01-15  BOSTER: < Sastre : Qh6+> . Nice pin . You are right. Thanks.
Feb-01-15
Premium Chessgames Member
  CHESSTTCAMPS: <BOSTER: What if after 27.Bxe5 Rc8 in between move. ...> 28.Rh8+ still forces mate.

Try playing the puzzle position against Crafty, using the following URL:

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

Feb-01-15
Premium Chessgames Member
  Jimfromprovidence: I completely overlooked the 29...Qd8, defense, which makes this a Sunday caliber puzzle.

So, after 29... Qd8 30.Rxd8 Rxd8 31 Qxe7 Rd1, 32 Qf8+ seems to warrant a good look, with the idea being 32...Kh7 33 Qf3, below.


click for larger view

This move stops the ...Rf6, seeing ...Rf1 threat for black. Black also has to worry about Qh3+ seeing Qc8+, winning the rook.

Feb-01-15  Modulo: White to play. 27. ? Insane
The line that comes to my mind is:

27. Bxe5 dxe5

(27. ... Rf8
28. Rh8+!! Kxh8
29. Qh6+ Kg8
30. Qxg7#)

28. Rh8+!! Kxh8
29. Qf7 Qd8

(29. ... g5
30. Qe8+ Kh7
31. Rd7!
And Black has the choice of giving up his queen for the rook or to lose the bishop while still being exposed to a mate threat on g7.)

30. Rxd8 Rxd8
31. Qxe7

White is up Q+N vs. R+R in the endgame and while this sure is not trivial, White should be winning here.

This is about as good as I can do. Time to check.

E: The post above shows an interesting line. My first idea would have been 33. ... Rad6, but 34. c3 creates a passed pawn that is really hard to stop for Black.

Feb-01-15
Premium Chessgames Member
  morfishine: Saw it all the way, now the Super Bowl!
Feb-01-15
Premium Chessgames Member
  gawain: I managed to see the combination through 29 Qf7 but did not notice 29 ...g5. I am happy, anyway, to have understood as much as I did. I rarely solve Sundays even partially.
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