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Leon S Lederman vs Mihai Suba
World Senior Championship (2014), Katerini GRE, rd 3, Oct-26
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Dec-09-15
Premium Chessgames Member
  watwinc: 45 Qxh3 46 Qxh3 e3+ 47 Rg2 Rbxd4 and White's goose is cooked early for Christmas
Dec-09-15  dfcx: white will play RxQ next. 45...Qxg5 fails to 46.Qxg5 Bxg5 47.Rxh7#, 45...Bxg5 46.Rxh4 Bxh4 loses the queen. However black's bishop can be activated if the white queen is deflected.

45...Qxh3 46.Qxh3 e3+

A. 47.Rg2 Rbxd4 with Rd1 mating.

B. 47.Qg2 Bxg2+

C. 47.Kg1 exd2 48.Qxh6 d1=Q+ 49.Kf2 Rb7

Dec-09-15
Premium Chessgames Member
  gofer: There are at least three possible moves; Rbxd4, Bxg5 and the most likely Qxh3.

45 ... Rbxd4
46 Rxh4 Rxd2
47 Rxh6

45 ... Bxg5
46 Rxh4 Bxh4 (Bxe3 Rxh7#)
46 Qh6

<45 ... Qxh3!>
<46 Qxh3 e3+>

White could try for an end game where it is a whole rook down, but I doubt that would appeal much...

47 Rg2 Rbxd4
48 Qxe3 Rd1+
49 Qg1 Bxg5


click for larger view

<47 Kh1 exd2>

At which point white cannot stop the promotion...

48 Qd3 Rbxd4

48 Qf1 Rbxd4
49 Nd4 d1=Q

So white might as well see whether black can force mate!

<48 Qxh6 d1=Q+>
<49 Kf2 Qxd4+>


click for larger view

The dam that was Bd4 has been busted, the black rooks will poor through on the 4th rank and d file respectively, but in the end its much cleaner than that!

50 Kg3 Qe3#

50 Ke1/Kf1 Qd1+
51 Kf2 Rd2+
52 Ke3 Qe2# or Kg3 Qf3#

50 Ke2 Qd2+
51 Kf1 Qd1+
52 Kf2 Rd2+
53 Ke3 Qe2# or Kg3 Qf3#

Game Over...

~~~

White saw the writing on the wall...

Dec-09-15
Premium Chessgames Member
  patzer2: With a plan of 45...Qxh3 46. Qxh3 e3+ 47. Kg1 exd2 for today's Wednesday puzzle, I'm three for three so far this week.

The losing blunder is 45. Rh3?? Instead 45. Rg4! safely traps the Queen and wins.

Dec-09-15  kubbybulin: Hmm...it's a puzzle, gotta be a queen sac somewhere. Love it when it's the first candidate. QxR QxQ and oh look, I have a discovered check with the pawn push. Let's make sure I don't get mated before I queen... No, I can defend h7 in time (if I don't mate first). Looks like black is up a ton of material in all lines.
Dec-09-15  dfcx: Actually in my variation C above, 49...Qxd4+ mates soon.
Dec-09-15
Premium Chessgames Member
  agb2002: Black has the bishop pair for a bishop and a knight.

White threatens 46.Rxh4 and 46.gxh6. Also the rook on h3 x-rays h7, for example, 45... Bxg5 46.Rxh4 Bxe3 47.Rxh7#.

The bishop on a8 x-rays the white king. This suggests 45... Qxh3:

A) 46.Qxh3 e3+

A.1) 47.Rg2 e2

A.1.a) 48.Bc3 Rd1+ 49.Be1 Rxe1#.

A.1.b) 48.Bf2 Rd1+ 49.Bg1 Rxg1+ 50.Kxg1 e1=Q#.

A.1.c) 48.Qe3 Rbxd4

A.1.c.i) 49.Qxe2 Rd1+ and mate next.

A.1.c.ii) 49.Kg1 Rd1+ 50.Kf2 e1=Q+ 51.Qxe1 Rxe1 52.Kxe1 Bxg2 53.gxh6 Rd4 - + [R+B vs N+P].

A.1.d) 48.Qc3(g3) Rbxd4 looks similar to A.1.c.

A.2) 47.Kg1 exd2

A.2.a) 48.Qxh6 d1=Q+ 49.Kf2 Qxd4+ and mate soon.

A.2.b) 48.Qg4 Rxd4 49.Qd1 Bxg5 - + [2R+2B+P vs Q+N].

A.3) 47.Qg2 exd2 48.Ne4 d1=Q+ 49.Bg1 Bxe4 wins.

B) 46.gxh6 Qxe3 47.Bxe3 Rxd2 48.Bxe3 e3+ 49.Kg1 exd2 wins.

Dec-09-15
Premium Chessgames Member
  morfishine: After <45...Qxh3> White's position crumbles away: 46.Qxh3 e3+ 46.Kg1 exd2

<patzer2> is correct about the late blunder: <45.Rh3>??? Much better for White is <45.Rg4> which wins on the spot

*****

Dec-09-15
Premium Chessgames Member
  diagonalley: it's a woo-hoo wednesday! found 45.... QxR after a few minutes :-) ...black has his mighty QB to thank!
Dec-09-15  Nick46: Most surprisingly I got it (and the hattrick !!!) very quickly, yaaaaaaaaaaaay
Dec-09-15  saturn2: <saturn2 45 ...Bxg5 46 RxQ BxQ>

<gofer 46 (Bxe3 Rxh7#)> I missed that zwischenmatt.

Dec-09-15  roentgenium: A complicated puzzle today: many hanging and potentially hanging pieces, many lines to try, and a fair amount of foresight is needed. Too much foresight for me though; I underestimated the strength of 47...Rdxd4! in the 47.Rg2 line (failing to see the checkmating potential on the 1st rank). I am pleased that I evaluated the 47.Kg1 exd2 48. Qxh6 d1=Q+ lines out to mate, and the potential White checkmate after 45...Bxg5. But I guess I need to work more on seeing moves where the opponent has more than one possible continuation.
Dec-09-15  LIzzard: Misssed yesterday, but glad I found it today - yahoo!

Got stuck looking for a mate for a few min at first....

Dec-09-15
Premium Chessgames Member
  CHESSTTCAMPS: White's position looks strong on first glance, with active pieces, a passed c-pawn and a strong knight outpost at f6. But most of this is illusory. Although white does threaten 46.Rxh4 and gxh6, the white bishop, queen, and rook on d2 are actually tied down defensively and Ba8 rules the chessboard:

45... Qxh3! destroys the white position:

A.46.Qxh3 e3+ 47.Kg1 exd2 48.Qxh6 d1=Q+ 49.Kf2 Qxd4+ 50.Ke2 (Kg3 Qg1#) Qe1+ 51.Kf2 (Ke3 Qf3#) Qf3+ 52.K moves Rd1#

A.1 47.Rg2 Rbxd4 48.Qg4 Rd1+ forces mate

A.2 48.Qf1/g4 Rbxd4 49.Qd1 Bf3 wins

B.46.gxh6 Qxe3 47.Bxe3 Rxd2 48.Bxd2 e3+ wins

C.46.Kg1 Qxe3 47.Bxe3 Rxd2 48.Bxd2 Bg7 leaves white a rook down.

Time for review...

Dec-09-15
Premium Chessgames Member
  CHESSTTCAMPS: So the strong points of white's position really did rule the board just one move earlier! An instructive blunder.
Dec-09-15
Premium Chessgames Member
  CHESSTTCAMPS: <patzer2: ....
The losing blunder is 45. Rh3?? Instead 45. Rg4! safely traps the Queen and wins.>

True, but white still has to play correctly after 45... Qe1+. Others might have fun working that out...

Dec-09-15
Premium Chessgames Member
  offramp: Suba Good In Senior.
Dec-09-15
Premium Chessgames Member
  lost in space: I think I got it.

45...Qxh3 46. Qxh3 e3+ 47. Kg1 exd2 and no defence.

Dec-09-15  Underworld: 45...Qxh3, 46.Qxh3 e3+, 47.Kg1 e2, 48.Qf1 Rbxd4, 49.Qd1 Bf3 (Too much loss of material, mate soon.)

45...Qxh3, 46.gxh6 Qxe3, 47.Bxe3 Rxd2, 48.Bxd2 e3+ (Queening cannot be stopped.)

45...Qxh3, 46.Qxh3 e3+, 47.Rg2 e2, 48.Qe3 Rxd4, 49.h3 Rd1+, 50.Kh2 Bxg2, 51.Qxe2 R8d2, 52.Qe3 Ba8+, 53. Kg3 Rg2+, 54.Kf4 Bxg5# (52.Qxg2 Rxg2, 53.Kxg2 Bxg5 - leads to a won endgame for black with a rook and bishop vs. knight)

Dec-09-15
Premium Chessgames Member
  kevin86: Brutal ending: 45...{Qxh3 46 Qxh3 e3+ 47 Kg1 exd2 and regains the queen and is a passle of pieces ahead.
Dec-09-15  Dr. J: After 45...Qxh3 46.Qxh3 e3+ White has an additional defense not yet considered above: 47.Nd5 disrupts Black's communication on the d-file, and now 47...Bxd5+ 48.Kg1 exd2 49.Qd3 stops the promotion. However this is still not sufficient: 49...Be4 50.Qxd2 Rb4xd4 wins.
Dec-09-15  stst: The pawn blocking the B+ is clue, the quick way is to offer the Q: 45........ QxR
46.QxQ (what else? QxP??) P advances, dis+ by Q at corner, then picks up the R onto promotion, thus making a new Q!
Dec-09-15
Premium Chessgames Member
  Bubo bubo: 45...Qxh3 46.Qxh3 e3+ and 47...exd2 gets two rooks for the queen, but this queen will soon be reborn on d1.
Dec-10-15  Cheapo by the Dozen: Material is evenish -- Black has the bishop pair but ghastly pawn structure. Black also has all sorts of issues on the h-file; if he moves both queen and bishop he's apt to be mated promptly at h7. So my answer is

45 .. Qxh3
46 Qxh3 e3+
47 Kg1 exd2

Passive defense now fails, because by the time White has firmly stopped Black from queening his bishop will be lost and Black's bishop will be safe. But

48 Qxh6 d1(Q)+
49 Kf2 Qh5

is a disaster for White.

Dec-10-15  Cheapo by the Dozen: There were a couple of cases early on where White repeated moves in a way that made it look as if he would have been happy to draw.
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