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Shakhriyar Mamedyarov vs Tomi Nyback
European Championship (2005), Zegrze POL, rd 7, Jun-25
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation Quiet Line (E15)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-29-15  gofer: It looks like Rd8 wins on the spot, but as <Boster> doesn't like my animated comments, I will tone them down...

<44 Rd8 ...>

44 ... Bxc4
45 Rh8#

Option 1

44 ... Qc5+
45 Qxc5 bxc5+
46 Ka5! Kh5
47 Rh8+ Kg4
48 Rxh3 Kxh3
49 Kxa6


click for larger view

Option 2

44 ... Qe1+
45 Bc3 Qxc3+

(45 ... Rxc3? 46 Rh8+ Kg7 47 Qd4+ Kf7 48 Rh7+ Ke6 49 Qd7+ Kf6 50 Rf7#/Qf7#)

46 Qxc3 Rxc3
47 Kxc3


click for larger view

Option 3

44 ... Qxe5
45 fxe5 Bxc4
46 Rh8+ Kg7/Kg5
47 Rxh3


click for larger view

~~~

Yep.

Jan-29-15
Premium Chessgames Member
  agb2002: The material is identical, with opposite colored bishops.

Black threatens 44... Bxc4 and 44.Qxa6 loses immediately to 44... Qxb3#.

The black king can only move along the h-file. This suggests 44.Rd8, threatening 45.Rh8#:

A) 44... Kh5 45.Rh8+ Kg4 46.Rxh3 K(Q)xh3 (46... Qe1+ 47.Qc3 Qe4+ 48.Ka3 + - [R]; 46... Bxc4 47.Rxe3 + - [R]) 47.Qxa6 + - [B].

B) 44... g5 45.Qe6+ and 46.Rh8#.

C) 44... Qe1+ 45.Qc3

C.1) 45... Rxc3 46.Rh8#.

C.2) 45... Qe4+ 46.Ka3 and the double threat 47.Rh8# and 47.Qxh3+ wins (46... Qxe5 47.Qxh3+ and 48.fxe5, etc.).

C.3) 45... Qxc3+ 46.Bxc3 Kh5 (only move) 47.Ra8 wins a pawn with the better endgame.

D) 44... Qxe5 45.fxe5 Bxc4 46.Rh8+ Kg7 47.Rxh3 + - [R vs B].

Jan-29-15
Premium Chessgames Member
  agb2002: Now I don't know why I chose 45.Qc3 (+0.67) instead of the obvious 45.Ka3 (+3.0) I already saw (in C.2).
Jan-29-15  morfishine: I had to peruse this position awhile before realizing that since White has no effective check, he must threaten something

After <44.Rd8> Black curiously has no defense to 45.Rh8+

For example, 44...Kh5 45.Rh8+ Kg4 46.Qe6+; or 44...Qxe5 45.fxe5 Bxc4 46.Rh8+ Kg5 47.Rxh3

Perusing turns amusing

*****

Jan-29-15
Premium Chessgames Member
  Tabanus: I found 44.Rd8 after seeing (believe it or not) that 44.Qg8?? fails to 44...Qc5#
Jan-29-15  morfishine: <Tabanus> Great to see you drop by over here!
Jan-29-15  wooden nickel: 43. ... Ba6?? was a blunder! <One bad move ruins fourty good ones! - Horowitz>
Jan-29-15  rafal.kostecki: 43..Ba6?? crude move wchich only atatcked the white Queen,correct was 43)..Be4 44)Rd8 Kh5.
Jan-29-15
Premium Chessgames Member
  Penguincw: My moves were 44.Rd3 Bxc4 45.Rxe3 Rxe3 46.bxc4, and I guess it's not too bad.

Update: 44...Qxd3 would've been much better.

Jan-29-15  CHESSTTCAMPS: Material is even, with bishops of opposite colors providing a natural imbalance. Both forces are actively directed at the opposing king, and at first glance the black force appears more focussed, with the immediate threat of 44... Bxc4. With one move, white can turn the tables.

44.Rd8!

White exploits the vulnerability of the king on the edge.

A) 44... Bxc4 (and other irrelevant moves) 45.Rh8#

B) 44... Qe1+ 45.Bc3 Qxc3+ (Rxc3 46.Rh8#) 46.Qxc3 Rxc3 47.Kxc3 Be2 (Bb7 48.Rd7 wins) 48.Ra8 a5+ 49.Kc3 Kh5 (b5 50.ab Bxb5 51.Rd5 wins the a-pawn) 50.Rb8 Kg4 51.Rxb6 Kxc4 52.Rxg6 wins

C) 44... g5 45.Rh8+ Kg6 46.Qe6#

C.1) 45... Bxc4 46.Rh8#

D) 44... Qc5+ 45.Qxc5 bxc5+ 46.Kxc5 g5 47.Rh8+ 1-0

Time for review...

Jan-29-15  CHESSTTCAMPS: I failed to analyze 44.Qe5
<gofer> I'm fine with animated comments!! (not Reuben Fine though)
Jan-29-15  paavoh: At move 36, black may have had a draw at hand by exchaning the Queens before White could activate his Rook? Active play by both.
Jan-29-15  Nostrils: 44... Qe1+ 45.Bc3?? Qe7+
Jan-29-15  Cheapo by the Dozen: Material is even. White's queen is both overloaded -- she defends both b3 and c5 -- and under attack. 44 Qd5 looks like the only move that defends everything. But the queen also defends everything right where she is at c4. So White has time for 44 Rd8, threatening mate in one.

Black's only tries are 44 ... g5 and 44 ... Kh5, but neither works.

44 Rd8 Kh5
45 Rh8+ Kg4
46 Qe6+

wins a whole queen for White, while

44 Rd8 g5
45 Qe6+

forces mate in two more moves.

Jan-29-15  Cheapo by the Dozen: Oh yeah. I forgot about 44 ... Qxe5. That's the least bad defense, but loses to a timely Rh8+ as well.
Jan-29-15  Castleinthesky: I picked Rd8, but did not see Qxe5, so .5 credit.
Jan-29-15  TheaN: Thursday 29 January 2015 <44.?>

In endgame positions, one tempo can mean the difference between a win and a loss. In this case, going wrong probably draws for white, but he has a winning option as well. Black's bishop is attacking the white queen on c4; if the queen leaves the defense of c5 or b3, Qc5# or Qxb3# ends the game. The only move that comes to mind that defends is 44.Qd5 but this is a fairly passive move.

Instead, the black king's position on the kingside gives white the option to blatantly ignore the threats <44.Rd8!>. Δ Rh8#. If <44....Bxc4 45.Rh8#<>>, but running away doesn't work either <44....Kh5 45.Rh8+ Kg4 46.Qe6+ and 47.Rxh3+ <>> and black loses the queen and soon the game.

If black instead counters, he has more chances to disrupt white's combination. Trading queens will not help: <44....Qc5+ 45.Qxc5 bxc5+ 46.Ka5! Kh5 47.Rh8+ Kg4 48.Rxh3 Kxh3 49.Kxa6 <>>. Objectively the best try seems to be <44....Qxe5?!<>> taking control over crucial squares a5, c3, c5 and h8. However, white still wins the exchange <45.fxe5 Bxc4 46.Rh8+ Kg5 47.Rxh3 Be6 <>> and this should be theoretically won for white.

The best swindle seems to be the idea <44....Qe1+>. <45.Ka3!> is best as the white king is safe <45....Rxb3+?! 46.Qxb3 Qc1+ 47.Ka2 >, if white thinks this is too dangerous and plays 45.Bc3?! black has the interesting 45....Rxc3?! but this loses the queen 46.Rh8+ Kg7 47.Qg8+ Kf6 48.Qf8+ Ke6 49.Qe8+ Kd5 50.Qxe1 . All in all, black is lost.

Jan-29-15  TheaN: <gofer: It looks like Rd8 wins on the spot, but as <Boster> doesn't like my animated comments, I will tone them down...> You should write comments as you want too. From time to time it's refreshing to just write down what you think on the spot; it's enjoyable to read yours.
Jan-29-15
Premium Chessgames Member
  patzer2: Missed this Thursday puzzle, finding nothing better than the quiet 44. Qd5 which fizzles out to equality after 44. Qd5 Bb7! 45. Qc4 (not 45. Qxb7?? Qxb3#) 45...Be4 =.

Looked at 44. Rd8! but thought too quickly that 44...Qxe5 ended the mate threat. However, I should have looked further to see the winning skewer after 44. Rd8 Qxe5 45. fxe5 Bxc4 46. Rh8+ Kg5 47. Rxh3 Bd5 48. Rd3 with a won Rook versus Bishop end game

Jan-29-15  dfcx: medium white to move. material even with black bishop attacking white queen. 44.Qxa6?? Qxb3#
much better is
44.Rd8! Bxc4? 45.Rh8#
If
44...Kh5 45.Rh8+ Kg4 46.Rxh3 Qxh3 47.Qxa6
44...Qxe5 45.fxe5 Bxc4 46.Rh8+ Kg7 47.Rxh3
Jan-29-15
Premium Chessgames Member
  doubledrooks: I missed that after 44. Rd8 Qe1+ 45. Bc3 Qe7 that White gets mated. I overlooked that Qe7 was a check.
Jan-29-15  Edeltalent: 44.? White to move

Equal material in a very concrete position. Bishops of opposite color together with heavy pieces often lead to imbalanced positions. In this case, with few pawns and the kings in uncomfortable spots, both sides are attacking and defending at the same time. At first glance, it seems Black is calling the shots, as he is attacking the queen, which is restricted in her movement, having to defend against Qxb3# and Qc5#. I was wondering for some time if White might be looking for a save here, but 44.Qd5 would hold everything together, so the situation is not that bad.

Having realized that, we can look for more ambitious shots. The bishop could give a check, but it leads to nothing. The queen would like to get closer to the black king, but as said, she has too many defensive duties to accomplish that. That leaves the rook. After 44.Rd8, threatening Rh8#, suddenly you realize that my description "both sides are attacking and defending" was actually not correct. Black's pieces are aggressive, but do nothing to prevent White from entering his camp from behind.

44...g5 45.Qe6+ and 44...Kh5 45.Rh8+ Kg4 46.Qe6+ lead to a quick decision.

The counterattack also fails, after 44...Qe1+ 45.Ka3 (not 45.Bc3?? Qe7+) Rxb3+ 46.Qxb3 Qc1+ 47.Bb2 Qc5+ 48.Qb4 Qe3+ 49.Ka2 Qe6+ 50.Ka1, Black is running out of steam.

That leaves 44...Qc5+ 45.Qxc5 bxc5+ 46.Kxc5 Kh5, but unfortunately for Black, the ending is just lost after 47.Rh8+ Kg4 48.Rxh3 Kxh3 49.b4, e.g. 49...Kg4 50.b5 Bc8 51.Kc6 g5 52.fxg5 Kxg5 53.Bd4 a6 54.b6.

44...Qxe5 could be a shocker if you didn't foresee it, but it's not more than that, as White again prevails after 45.fxe5 Bxc4 46.Rh8+.

Jan-29-15  Edeltalent: <gofer> How could you be so tight-lipped today? ;-) Speak your mind!
Jan-29-15  stst: White got tied up except the R, and while the b3 P is guarded by the temporary existent Q, it's White to move, so give Black a pending check by virtue of the R and B, until BxQ materializes:

Rd8, if BxQ, Rh8+ and mates.

and if Kh5, Rh8+ Kg4, Qe6+ etc White will be at least a R up

Jan-29-15  TheBish: Mamedyarov vs T Nyback, 2005

White to play (44.?) "Medium", even material.

White seems to be in quite a predicament. His queen is attacked by the Ba6, but it can't be captured because if 44. Qxa6 Qxb3#. Also, if it runs away, say 44. Qg8 Qc5# is the result. The queen can move to guard both b3 and c5, such as Qd5, Qc3 or Qc2, but these would be purely defensive moves that don't prove much. So the answer lies in the power of another piece.

44. Rd8! and now:

(a) 44...Bxc4 45. Rh8# is exactly what White wants; 44...Kh7 45. Rh8# is the same.

(b) 44...Qe1+ 45. Ka3 Kh5 46. Rh8+ Kg4 47. Qe6+ Kf3 48. Rxh3+ is winning.

(c) 44...Kh5 45. Rh8+ Kg4 46. Qe6+ Kg3 37. Rxh3+ wins everything.

(d) 44...g5 45. Rh8+ Kg6 46. Qe6#.

(e) 44...Qxe5 45. fxe5 Bxc4 46. Rh8+ skewers the king and rook, winning the exchange.

(f) 44...Qc5+ 45. Qxc5 bxc5+ 46. Kxc5 Kh5 47. Rh8+ Kg4 48. Rxh3 Kxh3 49. Bb8 Kg4 50. Bxa7 Kxf4 51. b4 and White wins the endgame; after Black gives up his bishop for one of White's pawns, the other will queen, while White will be able to sacrifice his bishop for Black's g-pawn.

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