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Alexander Sergeevich Sergeev vs Veniamin Sozin
USSR Championship (1924), Moscow URS, rd 2, Aug-??
English Opening: King's English Variation. General (A20)  ·  0-1



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sac: 16...Nxg3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Premium Chessgames Member
  Phony Benoni: Sozin makes beating the English look so easy. And without even playing ...Bc5!

Of course, I imagine 2.a3 is not the most energetic line for White.

Sep-26-15  zanzibar: Mato Jelic looks at this game here:

He suggests that 16.h3 holds (but identifies 15.Bd3 as better than 15.Qd2, but I'm not sure it's so decisive).

(White to defend, move 16)

click for larger view

r4rk1 /pb3p1p/1p1p2p1/4bn2/1PP4q/P1N5/1B1QBPPP/R3R1K1 w - - 0 1

Moving the wrong pawn is clearly the cause of the loss.

(Both Stockfish and Critter seem to think 9.b4 was weak, when White could maintain a slight edge with 9.d5 instead)

Dec-25-17  Saniyat24: Is this the Sozin of the Fischer-Sozin attack?
Dec-25-17  sudoplatov: 1.c4 e5, 2.a3 transposes into Anderssen's opening.
Dec-14-21  Brenin: 16 ... Nxg3 (threatening 17 ... Nxe2+ and 18 ... Qxh2+19 Kf1 Qh1 mate) 17 fxg3 (17 hxg3 Qh1 mate) Bd4+ 18 Kf1 Qh3 mate.
Dec-14-21  mel gibson: I missed this one.

Stockfish 14 says:

16... Nxg3

(16. .. Nxg3 (♘f5xg3 f2xg3 ♗e5-d4+ ♕d2xd4
♕h4xd4+ ♔g1-f1 ♕d4-d2 ♖a1-a2 ♖f8-e8 ♖e1-d1 ♕d2-h6 h2-h4 ♕h6-e3 ♖d1-d3 ♕e3-e6 ♗b2-c1 ♕e6-h3+ ♔f1-e1 ♕h3-h1+ ♔e1-d2 ♖a8-c8 ♗c1-b2 ♕h1-g2 ♖a2-a1 d6-d5 ♖d3-d4 ♕g2-f2 ♖d4-f4 ♕f2xg3 ♖a1-f1 d5-d4 ♘c3-d1 ♖e8xe2+ ♔d2xe2 ♖c8xc4 ♔e2-d2 ♕g3-b3 ♔d2-e1 ♖c4-c2 ♗b2xd4 ♖c2-c1 ♔e1-f2 ♕b3-c2+ ♔f2-e3 ♗b7-a6 ♔e3-f3 ♕c2-d3+ ♔f3-g2 ♗a6-b7+ ♖f1-f3 ♕d3xd1 ♖f4xf7 ♕d1xd4 ♖f7xb7 ♕d4-g4+ ♔g2-f2) +9.53/35 175)

score for Black +9.53 depth 35.

Premium Chessgames Member
  scutigera: <Saniyat24>: Yep, the man himself.
Dec-14-21  saturn2: 16...Nxg3 works but starting with 16...Bxg3 does not. After 17.fxg3 Nxg3 white has 18.Nd5 blocking the long diagonal.
Premium Chessgames Member
  raymondhow: < 16...Nxg3 works but starting with 16...Bxg3 does not > indeed, and I'm still solveless for the week..
Dec-14-21  Brenin: The wrong pawn: instead of 16 g3, White could have avoided this disaster with 16 h3 and 17 Nd5.
Premium Chessgames Member
  Teyss: <raymondhow> Indeed Monday was Tuesdayish, Tuesday is Wednesdayish, hopefully Sunday will be very easy.

Was hesitating between 16...Nxg3 and Bxg3 thinking 17.fxg3 was no good for Black because after 18.Bf1 both h3 and h2 are covered, until I realised it opens the diagonal.

Premium Chessgames Member
  agb2002: White threatens gxh4.

White's f- and h-pawns protect g3 and also block the diagonal a7-g1 and the h-file respectively. This suggests 16... Nxg3:

A) 17.fxg3 Bd4+ 18.Qxd4 (18.Kf1 Qh3#) 18... Qxd4+ wins decisive material.

B) 17.hxg3 Qh1#.

C) 17.Nd5 Ne4, with the double threat Qxh2+ and Nxd2, is winning.

D) 17.Bd3 Ne2+ 18.Kf1 (else mate in two at most) 18... Qh3+ 19.Kxe2 Bf3+ 20.Ke3 Bg4+ 21.Ke4 (21.f3 Qxf3#) 21... Qg2+ and mate next.

E) 17.Bd1 Ne2+ (17... Nf1 18.Kxf1 Qh3+ 19.Ke2 Bf3+ 20.Kd3 Be4+ 21.Kxe4 [21.Ke2 Qg4+ and mate in three] 21... Qf5+ 22.Ke3 Bf4+ 23.Ke2 Rfe8+ 24.Qe3 Bxe3 25.fxe3 Qh5+ and 26... Qxh2 must also be winning) 18.Kf1 Nf4 19.f3 (due to Qh3+ and Qxh2) 19... Qh3+

E.1) 20.Kf2 Qxh2+ 21.Ke3 (21.Kf1 Qxd2) 21... Ng2+ 22.Kf1 (else 22... Nxe1+) 22... Qh1+ followed by Nxe1 wins decisive material.

E.2) 20.Kg1 Bd4+ 21.Kh1 (21.Qxd4 Qg2#; 21.Re3 Bxe3+) 21... Bxf3+ and mate in two.

F) 17.f3 Bd4+ 18.Kg2 Nxe2

F.1) 19.Qxe2 Qg4+ 20.Kf1 Bxf3 wins.

F.2) 19.Nxe2 Qg4+ 20.Ng3 (else 20... Qxf3#) 20... Bxf3+ 21.Kf1 Qh3+ 22.Qg2 Qxg2#.

F.3) 19.Rxe2 Qg4+ 20.Kh1 (20.Kf1 Qg1#) 20... Bxf3+ 21.Rg2 Bxg2+ wins decisive material.

Premium Chessgames Member
  chrisowen: Quosh ie keys a Ng3 give it acme it aggregate i keys qigong quosh ie a keys o jasmine packet kins take i o bow its hqs keys i quandary crowned its duty keys dug its guv flavour v sassy exorbitant keys a gack gi c gungho keys chitter i keys cogs hood tink i keys aorta its java hack keys band wagon ajar koine higgle huck i hunt hang it c i jo keys its c hog i die c keys suffice bandwagon a cuff faith keys if jo gaggled its efface keys hunch photon found keys i c fox i keys get can z codes z man c fine keys feng honeybee keys its c greed its vet backed it i ve feed it gg keys rig it jet keys candid hail x deck hire craggied hi keys chef keys ji feed it egg keys i din cane its fame its munched it ben c dine z axed it renal keys failure vint greetings kid knight sac rub i g3 knight out lesson resolve get able chi too nimble no ai keys never no v i minotaur no la u not racy axiom dope open ended it Ng3 bod;
Premium Chessgames Member
  Teyss: Looking at <agb2002>'s lines it's even more Thursdayish than Wednesdayish. 😕 Didn't consider 17.Bd1 or Bd3. Well done agb.
Dec-14-21  parch: Went with 16...N:g3 17.f3
(17.fg3 Bd4+ )

17...Bf4 18.Qd4

(18.Qd3 Nf5 wins )

18...Nf5 19.Qf2 Be3

Dec-14-21  AlicesKnight: Looked at both g3 captures and selected the N - correct! Either capture brings quick trouble.<agb2002> seems to say it all. Black doesn't need the idea of 17. .. Qxh2+ 18.Kxh2 Nf1++ winning back the Q with 2 Ps up - there is much more to gain.
Dec-14-21  BxChess: <agb2002:> In your line E 18...Nf4, instead 18...Bf3 gives mate in 2.
Premium Chessgames Member
  agb2002: <Teyss: Looking at <agb2002>'s lines it's even more Thursdayish than Wednesdayish. 😕 Didn't consider 17.Bd1 or Bd3. Well done agb.>

<AlicesKnight: Looked at both g3 captures and selected the N - correct! Either capture brings quick trouble.<agb2002> seems to say it all.>

Thank you! I was interested in finding a clear winning maneuver for any reasonable reply to Nxg3.

<BxChess: <agb2002:> In your line E 18...Nf4, instead 18...Bf3 gives mate in 2.>

I missed this possibility. After 18... Bf3 19.Rxe2 Qxh2 White has 20.Qg5, which saves mate but is a total disaster: 20... Qh1+ 21.Qg1 Bg2+, etc.

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