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V Popov vs Nikolai Riumin
Moscow ch (1929), Moscow URS
Nimzo-Indian Defense: Spielmann Variation (E22)  ·  0-1

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-10-10  VAN37: Riumin's the most improbable combination.
Jan-05-23  Brenin: 27 ... Qxf3+ 28 Kxf3 Nxd4+ with mate to follow in a few moves. A pretty finish, and not hard to see once you know it's a puzzle position.
Jan-05-23  goodevans: Very pretty. Exquisite even. But set as a puzzle, not particularly taxing.
Jan-05-23  Brenin: Why did White not play 14 dxc4, wining a P and putting pressure on Black's d-pawn? And why 16 e4, opening up the long diagonal for Black's B on b7? Poor play by White.
Jan-05-23  Mayankk: Knowing its a puzzle, the first move one almost always considers is a piece sac - Queen sac preferably.

With this thought process, the solution struck almost instantaneously - sac Queen via 27 ... Qxf3+, double check via 28 Kxf3 Nxd4+, push King to the only square, 29 Kg4, count escape squares and mate by 29 ... Bc8+ 30 Kh4 Nf3#. Nf3 is also a royal fork but since we are already down a Queen, so mating is the only winning option.

The tactical combination starts at 26 ... Rxf3. Much tougher to visualize from there. In a real game situation even more so.

Jan-05-23  King.Arthur.Brazil: It's a wonderful combination: 27...♕xf3+ 28. ♔xf3 ♘xd4+ 29. ♔g4 ♗c8+ 30. ♔h4 ♘f3#! The King found it!
Jan-05-23  Brenin: Of course, White can decline the Q sac, but it doesn't help. For example 28 Kg1 Nxd4 and Qg2 mate, or 28 Kf1 Bc8 29 Reb1 (or c1 or d1) Bg4 (threatening Qh1 mate) 30 Kg1 Bh3 and 31 ... Qg2 mate, or 28 Kh3 Bc8+ 29 Kh4 Qg4 mate.
Jan-05-23  sfm: <Brenin: Why did White not play 14 dxc[5]...>

Hard to answer.
It likewise raises the question "Why did Black play play 13.-,b5??"

Maybe moves were swapped since the game was played? So not
13.-,b5?? 14.Qc2??,c4
but
13.-,c4 14.Qc2,b5
which makes complete sense

Jan-05-23  King.Arthur.Brazil: <Brenin> It seems that White wanted to play for K-side attack. Maybe, he figured that a plan ♕c2-e4-e5 would work. For example:16...♕e7? 17. e5! ♘d7 and Black has not a good position. White didn't expected the exchange and was uncontrolled after that. He did a defensive move 20.g3? with no development: the ♗c1 and ♖a1 are out of the game and a poor ♗e2. Meanwhile, Black has all weapons in place and had not even a ♘ to protect his ♔.
Jan-05-23  King.Arthur.Brazil: After 24. ♘h4 ♘xd4 25. f3 ♘xe2+ 26. ♕xe2 g5 27. ♘g2 ♖xf3 would be very uncomfortable for White. The ♘ has no place to go after 23...♖f6.
Jan-05-23  TheaN: What a combination. Wonderful. These chases are rare. <27....Qxf3+!>, given 28.Kxf3 Nxd4+, covering both e2 and f3, 29.Kg4 Bc8+ 30.Kh4 Nf3#. I'd want to dub this the main line, but I think White should retreat and give Black options to mess up.

Not 28.Kh3 Bc8+ 29.Kh4 Qg4# or 28.Kg2 Nxd4 with Qg2#. However, <28.Kf1> requires some careful play. I missed the best move 28....Bc8! still, threatening Bh3# and after 29.Red1 Bg4! forces mate regardless as the king has to prevent Qh1#: 30.Kg1 Bh3 with 31....Qg2#. I played the -20 <28....Ne5!? -+>, still discovering the knight, threatening Qg2+/Qh1+ with Bf3#. SF gives 29.Qd1 with 29....Qg2+ 30.Ke2 Bf3+ -+ as best, which is enough for me, honestly.

Jan-05-23  TheaN: Surprisingly, in my 'best' line 27....Qxf3+ 28.Kf1, even the 'accepted line' works, 28....Nxd4!. The point is 29.Qxd4 Rd8 -+ and White can't move the queen because it opens the d-file following Qg2+ and Bf3#, and 29.Bxd4 opens the e-file leading to 29....Qg2+ 30.Ke2 Bf3+ 31.Ke3 Re8+ 32.Be5 Bb6+ #6. Amazing stuff.
Jan-05-23  Brenin: <sfm: Maybe moves were swapped> Thanks, that explanation about 14 Qc2 makes a lot of sense.
Jan-05-23  jrredfield: I did see the first few plies rather quickly, but didn't see all the way to the N fork and mate 30 ... Nf3+. The adjoining Black bishop attacks were key to this sequence. Analysis of the earlier stages of the game show that Black built up a superior position early on and played brilliantly to capitalize on it.
Jan-05-23  mel gibson: Fairly obvious today.

Stockfish 15 says mate in 5:

27... Qxf3+

(27. .. Qxf3+ (♕d5xf3+ ♔g2-f1 ♗b7-c8 ♖e1-b1 ♗c8-g4 ♔f1-g1 ♗g4-h3 a3-a4 ♕f3-g2+) +M5/245 8)

Jan-05-23  agb2002: Black has a knight for a rook.

White threatens Bxd5.

All black pieces except the rook aim at the white king. This suggests 27... Qxf3+:

A) 28.Kxf3 Nxd4+ 29.Kg4 Bc8+ 30.Kh4 Nf3#.

B) 28.Kh3 Bc8+ 29.Kh4 Qg4(h5)#.

C) 28.Kg1 Nxd4 and 29... Qh1#.

D) 28.Kf1 Bc8 29.Reb1 Bg4 30.Kg1 Bh3 and 31... Qg2#.

Jan-05-23
Premium Chessgames Member
  Check It Out: Fairly easy combo to spot. Nice analysis on the forum.
Jan-05-23  saturn2: 20.g3 Qd5 and white had to perish on the diagonal
Jan-05-23  AlicesKnight: Found the gameline fairly quickly. The white K is sucked out of shelter and the two-bishop cordon drives it to the edge. Three minor pieces well co-ordinated.
Jan-05-23
Premium Chessgames Member
  chrisowen: Talon red its quick vibe its whip Qxf3+ aflung dim fib aha its hark aggregate quagmire its ignite Qxf3+ afford;
Jan-05-23  Refused: The finish is nice but not that difficult to work out, once you know it is there (puzzle problem).

27...Qxf3!! 28.Kxf3 Nxd4+ that forces the king out of his safety and comfort zone. 29.Kg4 Bc8+ 30.Kh4 Nf3#

Turning down the queen is equally joyless.

28.Kf1 Bc8 and the threats of Bh3+ Qg2# and Bg4 Qh1# end the game on the spot 28.Kh3 Qh5+ 29.Kg2 Nxd4+ white will get mated soonish e.g. 30.f3 Qxf3+ 31.Kg1 (Kh3 Qh5#) Qh1+ 32.Kf2 Qg2#

28.Kg1 Nxd4 and there's defebce against Qg2#

Jan-05-23  Hercdon: Beautiful!
Jan-05-23  johnnydeep: Easy day for me: saw the game line up to Nxd4+ in under a minute!
Jan-05-23
Premium Chessgames Member
  takebackok: Yes, easiest one this week, i think.
Nov-05-24
Premium Chessgames Member
  GrahamClayton: Two consecutive sacrifices on the same square (26...Rf3 & 27...Qf3+) set up a killer double check.
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