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Alireza Firouzja vs Emilio Cordova
Aeroflot Open (2017), Moscow RUS, rd 9, Mar-01
Sicilian Defense: Dragon Variation. General (B70)  ·  1-0



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Kibitzer's Corner
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Premium Chessgames Member
  ChessHigherCat: Well, I was on the right track but 33. g3 is bad because Rf3 really is better than Re4, leading to this situation, where the rook can't take d6:

click for larger view

Moral of the story: that'll larn me

Jul-26-18  Mayankk: I saw the weakness of Black’s back-rank and lack of flight squares for its king, the fact that any check, whether with a knight or Rook, will lead to an immediate mate. None of the knight moves seemed to work though, which suggested the idea of opening up the d file for a potential check.

So we exchange a pair of Rooks at d3, bring back another Rook to displace enemy Queen and then capture at d6 to threaten mate.

So far so good. After that it got murky and beyond my pay-grade.

Jul-26-18  patzer2: Found all six moves of today's Thursday (31. ?) puzzle solution, starting with 33. Rxd3 +- (+3.92 @ 25 ply, Stockfish 9).

For me, it was more like playing an actual game than solving a chess puzzle. Perhaps that's because I wasn't sure White had a decisive advantage until I found the obstruction 37. Nd5 +-.

Black's decisive mistake according to the computer was 32...Kg8?, allowing 33. Rxd3 +-. Instead, 32...Ke7 33. g3 Rf3 34. Rxd3 Qxd3 35. Kg2 e4 36. Qh8 a5 ± (+0.78 @ 32 ply, Stockfish 8) puts up much more resistance.

Earlier, instead of 29...h6? allowing 30. Qxh6 ± (+0.82 @ 32 ply, Stockfish 8), Black could have held it level with 29...Rexe3! = (+0.08 @ 32 ply, Stockfish 8).

Jul-26-18  nalinw: Yes I got as far as 34. Rd1 but didnt see the defense and the defense to the defense - 37. Nd5 - which is the coolest part of todays puzzle
Jul-26-18  Walter Glattke: 34.-Qb3 35.Rxd6 Qb8 36.Rxf6!? Rxf6 37.Nd5 Re6! / 36.c5 Qf8 37.Qxf8+ Kxf8 38.Ra6 Ne4 39.c6! white advantage
Jul-26-18  jith1207: I was trying to make Nf5 work, or get to the point where Nf5 threatens a mate. After a long struggle for 15 minutes, I found the weakness of d file as rook can challenge the Queen supported by its Knight and threatening Rxd6, then mate.

Black must have seen this as he fought very well, but should have missed the Nd5 interposition, which helps simplify the position to a favorable ending for White at worst. Trying to make Nf5 work helped me identify the saving Nd5 move.

Premium Chessgames Member
  agb2002: Black's back rank is defenseless. This suggests 33.Rxd3 Qxd3 34.Rd1:

A) 34... Qe2 35.Rxd6

A.1) 35... Qxf2+ 36.Kh2

A.1.a) 36... Qxe3 37.Rd8+ Ne8 38.Rxe8#.

A.1.b) 36... Ne8 37.Rd8 f6(5) 38.Rxe8+ Kf7 39.Qf8#.

A.1.c) 36... Rd4 37.Nd5 (threats Ne7#, Rd8+ and mate next, and Nxf6+) 37... Rxd5 38.cxd5 Qf4+ (38... Ne8 39.Rd8 as above) 39.Qxf4 exf4 40.Rxf6 + - [R].

A.2) 35... Qe1+ 36.Kh2 Qa5 37.b4 Qc7 38.Rxa6 seems to win two pawns at least. For example, 38... Qb7 39.Ra2 Ne4 40.Kg1.

B) 34... Qb3 35.Rxd6 Qb8 36.Rxa6 wins two pawns at least (36... Qxb2 37.Ra8+ and mate in two).

C) 34... Qe4 35.Rxd6 Qa8 36.Qg5 (threatens Rxf6 and Qxe5)

C.1) 36... Ne4 37.Qxe5 Rxf2 38.Nd5 wins decisive material.

C.2) 36... Ne8 37.Rd8 wins.

C.3) 36... Kg7 37.Qxe5 Qe4 38.Qxe4 Nxe4 39.Rxa6

C.3.a) 39... Nxf2 40.Nd5 Rf5 41.Ne7+ wins decisive material.

C.3.b) 39... Rxf2 40.Ra8+ Kg7 41.Re8 Nf6 (41... Rf5 42.g3 wins the knight) 42.Kxf2 Nxe8 43.Kf3 + - [2P].

Jul-26-18  saturn2: I solved this puzzle.

<Walter Glatke 34.-Qb3 35.Rxd6 Qb8 36.Rxf6!? Rxf6 37.Nd5 Re6! / 36.c5 Qf8 37.Qxf8+ Kxf8 38.Ra6> In this line of you white has no more rook after move 36 so he cannot play 38 Ra8.

But before white can play 36 Rxa6 and is two pawns ahead.

Jul-26-18  diagonalley: wow!... difficult... <diagonalley>: nul points :-(
Jul-26-18  et1: 11 moves combination with a trick at the end - very difficult and very beautiful
Premium Chessgames Member
  Dionysius1: 37. ♘d5 - very pretty move, threatening mate and forcing Black to sacrifice pieces. SF's alternative for 37... is even more drastic!
Jul-26-18  Walter Glattke: Saturn2: the first example shows, 36.Rxf6!? is wrong, so the 2nd eample is 36.c5, or one can play Rxa6 here.
Jul-26-18  rudiment: I saw the general idea of getting a rook to the back rank, and the first move. But I fiddled around with 34. Ra1 and didn't find the game line.
Jul-26-18  CHESSTTCAMPS: Material is even. At first glance, black's centralized concentration of major pieces looks more impressive, while white's queen appears to be the "only" piece threatening the black king. But looks can be deceiving - once the battery of black major pieces is neutralized, the white pieces can take over.

33.Rxd3! Qxd3 34.Rd1 and now:

A.34... Qe2 35.Rxd6 Qxf2+ 36.Kh2 Ne8 (Ng4+ 37.hxg4 ends the black attack) 37.Rd8 f5 38.Rxe8+ Kf7 39.Qf8#

B.34... Qe4 35.Rxd6 Qa8 36.Qg5 Kg7 (Ne8 37.Rd8 Qc6 38.Qe7 wins) 37.Qxe5 with 38.Nd5 to follow.

C.34... Qb3 35.Rxd6 Qb8 36.c5 and the threats of c6 and Qg5 look crushing. One possible finish is 36... Ne8 37.Nd5 Nxd6 38.Ne7#

Jul-26-18  CHESSTTCAMPS: I overlooked the game continuation, 36... Rd4.
Jul-26-18  cocker: Black spurned a repetition on move 32.
Jul-26-18  saturn2: Walter Glatke: I see now you mentioned two lines.
Jul-26-18  mel gibson: I saw the first 5 moves - easy today.
Jul-26-18  malt: Come up with 33.R:d3 Q:d3 34.Rd1 Qb3 35.R:d6 Qb8 36.R:a6(c5)

Overlooked 34...Qe2

Jul-26-18  wtpy: I got all of this one, though it took a few minutes of pondering before the light bulb flashed on the finishing move Nd5. Agree with patzer2 that this puzzle felt "game like," perhaps because its start with Rd3 is not a puzzle like beginning move.
Jul-26-18  lzromeu: Lesson1: Castling ever than possible
Premium Chessgames Member
  Inedit2: 14 old !
Jul-26-18  morfishine: Its an "only mover"
Jul-26-18  PJs Studio: Have to get at blacks bank rank. Took me too long to find 33.Rxd3 & 34.Rd1 but 35.Rxd6 (hitting the back rank) and 37.Nd5 were easier to find. It’s all about calculation
Jul-26-18  landshark: Better late than never - it took me until now to get this one. Had me stumped for hours. Proves even a shark is capable of finding master level moves if given enough time /:
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