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Konstantinos Moutousis vs Semen I Dvoirys
Biel Interzonal (1993), Biel SUI, rd 1, Jul-16
English Opening: King's English. Four Knights Variation Fianchetto Lines (A29)  ·  0-1



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Kibitzer's Corner
May-06-20  malt: Nice game 28...B:f1 29.R:d2 ed2 30.Bf3 R:f3+
Oct-24-20  Walter Glattke: White is 2 pawns ahaead, the offside position of the white queen then suggests 20.-Rxf2 A) 21.Kxf2 B) 21.Rxf2 Qxa1+ C) 20.-Bxf1 A1) 21.Kxf2 Qb2+ 22.Kf3 Bg2+23.Ke3 Bh6+ 24.Kd3 Qd2+ B1) 21.Rxf2 Qxa1+ 22.Rf1 Qxf1# C1) 20.-Bxf1 21.Rxf1 Qe2 22.a4 Bd4 black advantage, so far I prefer A). They played Aa) 22.-f5 23.Ne3 Ab) 23.Ne7+ Kf7 24.Bd5+ Kxe7? 25.Rae1+ or 25.Qe6+ Ac) 23.-Kh8 24.Rfe1 Bg4+ 25.Kf4 mating a2) 22.-f5 23.Ne3 g5 24.Bd5+ liberate queen ways. 24.-Kh8 ... 34.Qf2 Re8+ would win, a3) 30.Bf3, possibly white wins then.
Oct-24-20  Honey Blend: Why not 30. ♗f3 and try to stop the pawn from queening? If 30. ... ♖f8 threatening to trade ♖ for ♗, White can try to draw by repetition with 31. ♗d5.
Oct-24-20  stacase: I would have moved 22...Bg2+ White has a choice of e3, f4, or g4 all of which Black can answer with another check. It's a King hunt with White's threat of Nf6+ or e7+
Premium Chessgames Member
  NM JRousselle: White was fine until he grabbed the pawn on a6 on move 20.
Oct-24-20  mel gibson: I saw the first ply in a few seconds.

Stockfish 12 says:

20... Rxf2

(20. .. Rxf2 (♖b2xf2 ♕a6-a3 ♖f2-g2+ ♔g1-h1 ♕e5-e2 ♘d5-f6+ ♗g7xf6 ♖f1xf6 ♖f8-d8 ♕a3-f3 ♕e2-b2 ♖a1-e1 ♖g2-e2 ♕f3xe2 ♕b2xe2 ♖f6-f1 ♕e2xf1+ ♖e1xf1 ♗h3xf1 ♗c6-d5 ♗f1-h3 ♔h1-g1 ♔g8-g7 a2-a4 ♗h3-e6 ♗d5-c6 ♔g7-f6 h2-h4 ♔f6-e5 ♔g1-f2 ♖d8-d2+ ♔f2-e3 ♖d2-a2 g3-g4 ♗e6xg4 ♔e3-d3 ♖a2-a3+ ♔d3-c2 ♗g4-e6 ♔c2-b2 ♖a3-h3 h4-h5 ♖h3xh5 ♔b2-c3 ♖h5-h3+ ♔c3-b4 ♖h3-g3 a4-a5 ♖g3-g4 a5-a6 ♖g4xc4+ ♔b4-b5 ♖c4-c1 a6-a7) +10.11/38 164)

score for Black +10.11 depth 38

Oct-24-20  Walter Glattke: In 1967 the Schach-Echo newspaper in Königsstein/Taunus had a compositor Giegold, who made puzzles with mate-in-3 and mate-in-4, and Pfannkuche, hemmo Axt and Seidel were always named as the best solutors of the previous month, This here is not nice, the separation of Workers and customers, they had in the past, is off, and we are half consuments and half workers for CG to prepare the material to goods in form of a service. In the eder times something was better than today, and the puzzle of this day is a good example for that.
Oct-24-20  Brenin: Black nearly threw away the win with 27 ... exf3+?, giving White drawing chances after 28 Kg3 Bxf1 29 Rxf1 (29 Rxd2 exd2 and the P will queen) Rb8 30 Bf3 stops Black's attack on the K and the advance of the e-pawn. Black should have played 27 ... Qxh2, attacking from a different side and denying the K safety on g3. Instead of safety with 30 Bf3, White went for glory with 30 Rf7, and payed the price.
Premium Chessgames Member
  Yuridmi: >>> Honey Blend: Why not 30. ♗f3 and try to stop the pawn from queening? <<< Honey Blend is correct, 30. Bf3 renders an even position
Premium Chessgames Member
  thegoodanarchist: I kept trying to find ideas along the long white diagonal, when the right idea was on the black long diagonal.
Oct-24-20  Hercdon: The pun “The Dvoirys Always Open”, as mentioned on his page, might work for this game as well.
Oct-24-20  Hercdon: Because while the door closed on the 28th move, it wound up opening again on the 30th
Premium Chessgames Member
  scruggs: Got the first few moves but then got lost in the mellay
Premium Chessgames Member
  agb2002: Black has the bishop pair for a bishop, a knight and two pawns.

Black has Bxf1 and Rxf2, trying to expose the white king by taking advantage of the overburdened rook on f1.

In the case of 20... Bxf1 21.Rxf1 (21.Kxf1 Qe2+ and mate soon) 21... Qe2, with the double threat Rxa7 and Bd4, looks very good for Black.

In the case of 20... Rxf2:

A) 21.Kxf2 Qb2+

A.1) 22.Kf3 Bg2+

A.1.a) 23.Kg4 Qe2+ and mate in three.

A.1.b) 23.Kf4 Qe5+ 24.Kg4 Qe2+ as above.

A.1.c) 23.Ke3 Bd4+ 24.Kf4 Qd2+ 25.Kg4 (25.Ne3 Qxe3+ 26.Kg4 h5+ 27.Kh4 Qe7+ 28.Rf6 Qxf6#) 25... f5+ 26.Rxf5 (26.Kh4 Qh6#) 26... gxf5+ 27.Kh5 Qe2+ 28.Kg5 Qg4+ 29.Kh6 Qg6#.

A.2) 22.Ke3 Qd4+

A.2.a) 23.Ke2 Bg4+

A.2.a.i) 24.Rf3 Bxf3+ (24... Qe5+ 25.Kd2 Bxf3 26.Nf6+ wins for White) 25.Kxf3 Qxa1 and Black looks better.

A.2.a.ii) 24.Ke1 Qxa1+ 25.Kf2 Bd4+ 26.Kg2 (26.Ne3 Qb2+ 27.Kg1 -27.Ke1 Qe2#- 27... Bxe3+ wins a piece at least) 26... Qb2+ (probably better than 26... Bh3+) 27.Kh1 Qe2 28.Nf6+ Kg7 wins decisive material.

A.2.b) 23.Kf3 Bg4+ 25.Kg2 Qe4+ 26.Kg1 (26.Kf2 Bd4+ 27.Ne3 Bxe3+ 28.Ke1 Qe5 wins) 26... Bd4+ 27.Rf2 Bxf2+ 28.Kxf2 (28.Kf1 Qh1+) 28... Qd4+ and 29... Qxa1 looks similar to A.2.a.i (the queen covers the knight fork on f6).

B) 21.Rxf2 Qxa1+ 22.Rf1 Qxf1#.

C) 21.Nf4 Rxf1+ 22.Rxf1 Qe3+ 23.Kh1 (23.Rf2 Qe1+ 24.Rf1 Qxf1#) 23... Bxf1 wins.

D) 21.Ne7+ Qxe7 22.Kxf2 Bd4+ 23.Kf3 Qe3#.

Premium Chessgames Member
  agb2002: I forgot the possibility 24.Kd3 f5, which looks winning, in my line A.1.c.
Oct-24-20  cormier: 16. Be4? 16.Rab1 Bf5 17.Rfe1 Qe7 18.Bxe4 Bxe4 19.Nxe4 Bxb2 ⩲ +1.15 (28 ply)

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