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Gerlef Meins vs Hannes Rau
Bundesliga (2015/16), Bremen GER, rd 5, Feb-06
Reti Opening: Advance Variation (A09)  ·  0-1



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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Premium Chessgames Member
  patzer2: Quickly saw the first four moves of today's Thursday puzzle with the Knight Fork combination 26. .Qxf1+! 27.Kxf1 Rc1+ 28.Ke2 Nf4+ 29. Ke3 Nxd5 .

However, I struggled to find the best winning move after 30. Kd4 which is 30...Nc4! that threatens yet another strong Knight fork after 31. Kxd5 Nxc2 .

P.S.: White's decisive mistake is 26. Rb3? which allows 26...Qxf1+ (-7.22 @ 29 depth, Stockfish 8.)

Instead, 26. a4 Qxa4 27. Nd6 Rd7 28. Rb7 Rxb7 29. Qxb7 to (+0.57 @ 31 depth, Stockfish 8) leaves White in fine shape.

Premium Chessgames Member
  agb2002: Black has a knight for a bishop and a pawn.

Black can win material with 26... Qxf1+ 27.Kxf1 Rc1+ 28.Ke2 Nf4+ 29.Ke3 Nxd5+ 30.Kd4 Nb6 31.Kxe5 Nc4+ followed by 32... Nxd2, ending up a rook or two exchanges ahead.

Premium Chessgames Member
  whiteshark: Solved it!
Jul-27-17  JohnBoy: I went w 26...Nf4 27.Qe5 Qf1+. How do engines see this?
Jul-27-17  gofer: Once you see the four move combination, then the start of this is simple; black wins a whole rook. But that isn't the end of the story.

<26 ... Qxf1+>

27 Kh2 Nf4!

<27 Kxf1 Rc1+>
<28 Ke2 Nf5+>
<29 Ke3 Nxd5+>
<30 Kd4 ...>

click for larger view

The white king is forced into the centre of the board and while there is going to take one of our knights! So we are looking like losing the whole rook advantage to being just an exchange up!

We have a choice of 16 knight moves and another 6 rook moves; all giving up one of the knights for a significant positional advantage.

So what is our best move?

<30 ... Nc4>

<31 Kxd5 Nxd2>
<32 Bd3 Nxb3>
<33 axb3 Rd1>
<34 Kd4 Rb8>
<35 Nc5 Rd8+>
<36 Kc3 Rc1+>
<37 Bc2 Rc8>
<38 b4 a5>
<39 Kb2 Rxc2+>
<40 Kxc2 axb4>

click for larger view

Premium Chessgames Member
  malt: got 26...Q:f1+ 27.K:f1 Rc1+ 28.Ke2 Nf4+ 29.Ke3 N:d5+ as far as I got
Premium Chessgames Member
  morfishine: <26...Qxf1+> followed by <27...Rc1+> 28.Ke2 and now <28...Nf4+> forks


Jul-27-17  The Kings Domain: Got this one after quite a think. Messy, unorthodox opening that led to a good game.
Jul-27-17  Iwer Sonsch: 26...Qxf1+ 27.Kxf1 Rc1+ 28.Ke2 Nf4+
Jul-27-17  Iwer Sonsch: 30...Nc4! does indeed make this combination a bit more decisive than it already was. Still, a combination to blitz and rethink afterwards.
Jul-27-17  saturn2: Like on thuesday a knight forking king and queen decides.
Jul-27-17  tonsillolith: Pet peeve: "I solved it! But I didn't see the last move..."
Premium Chessgames Member
  perfidious: <tonsillolith: Pet peeve: "I solved it! But I didn't see the last move...">

In the quiet of one's study, only pride is damaged; at the board, retribution usually follows, swift and sure.

Jul-27-17  Pasker: Very straight forward tactic which wins enough material to win the game. Even is 30...nc4 was not possible white white got enough out of the tactic.
Jul-27-17  NBZ: Missed Nc4!
Premium Chessgames Member
  kevin86: Black sacs the queen for a rook and uses a knight fork to regain the queen and expose the white king.
Premium Chessgames Member
  drollere: <Pet peeve: "I solved it! But I didn't see the last move...">

well, the "last move" is 9 moves deep, and while it's pretty, it's also 9 moves deep.

and it's also not the "last move", since the last move produces checkmate, and we have no checkmate following 30. .. Nc4. who knows what carlsen could manage against a 1400 player, even a rook down?

i have seen puzzle games that can go on for another 30 or 40 moves, and for some reason you don't hear about "finding the last move" with those games. so in this case you have a bit of moving the goal posts to assist with bragging rights ... which is fine, since the bragging is only in the quiet of one's study.

i generally try to solve a puzzle position either 6 moves deep or until the forcing line runs out. and after 29. .. Nxd5+ you have also 30. Ke2, so the forcing moves run out and you enter the realm where stockfish or some other engine helps a large proportion of the expert commentary offered here as a caution against retribution.

Jul-27-17  BOSTER: When the knight is near of the opponent queen, look for royal fork.
Jul-27-17  Cheapo by the Dozen: Step 1: Look for something obvious. Fail.

Step 2: Look for White weaknesses. Find one on the bank rank.

Step 3: Find a forced sequence that ends with Black slightly ahead in material, White's king on the fourth rank, and White having other weaknesses.

I actually stopped there, noting the possible fork at d2 but not actually calculating out from ... Nc4. That was already enough to justify playing the line, under any time control faster than "correspondence".

Jul-27-17  swclark25: Got everything down to move 30.

Why not 30)....Nc6+ rather than 30)...Nc4

Jul-27-17  RandomVisitor: 22...Qf6! if white now moves the e4 bishop to a safe spot, 23...Nf3+ exposes the undefended white queen to capture.

click for larger view


<-2.72/32 23.Qd6 fxe4> 24.Qxf6 Rxf6 25.Rfe1 N5g6 26.Rxe4 Rc2 27.Ra4 Rxd2 28.Rf1 Nc6 29.Nc5 Rc2 30.Ne4 Rf8 31.f3 Rb8 32.Rf2 Rb1+ 33.Kh2 Rxf2 34.Nxf2 Rb2 35.Nd1 Rd2 36.Nc3 Kg8 37.a3 Rd3 38.Ne4 a5 39.Kg3 Nge5 40.Nc5 Rd5 41.Ne4 Kf7 42.f4 Nd3 43.Rc4 Rd4 44.Rxd4

-4.10/31 23.Kh1 Rc4 24.Qd6 fxe4 25.Qxf6 gxf6 26.Rfc1 Rfc8 27.Rxc4 Nxc4 28.Rb5 Kg7 29.g4 Ng6 30.Rc5 Rxc5 31.Nxc5 Nxd2 32.Ne6+ Kf7 33.Nd4 Nf4 34.Kh2 Nd3 35.Kg3 a5 36.h4 a4 37.Nb5 Ke6 38.Nc3 a3 39.Nb5 Nc4 40.Kg2 Kd5 41.Kg3 Ke5

Premium Chessgames Member
  takchess: 26.....Qxf1 27 Kxf1 Rc1 + 28 Ke2 Nf4+ 29 k moves take queen. And if 27 kh2 you are up a rook and continue to attack. I continue my first full week, I feel good about this answer
Jul-27-17  BOSTER: After 27.Kh2 Qxg2+ 28.Kxg2 and
Jul-27-17  newzild: <<swclark25>: Got everything down to move 30. Why not 30)....Nc6+ rather than 30)...Nc4>

Because after 30...Nc6+ 31. Kxe5, Black only has a slight material advantage (the exchange for a pawn), whereas 30...Nc4 threatens 30...Nxd2, winning another exchange and pawn.

Jul-28-17  swclark25: thanks for the reply <newzild>. I noticed this about an hour later.
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