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Sergey Kudrin vs Hermes Amilcar Machado Jr
Thessaloniki Olympiad (1988), Thessaloniki GRE, rd 5, Nov-18
Russian Game: Classical Attack. Staunton Variation (C42)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Nov-03-03
Premium Chessgames Member
  Chessical: A superb game by Kudrin who conjured up a ferocious attack with a Tal like speculative sacrifice. Perhaps in theory it was only was worth a draw, but in practice it overwhelmed an opponent who appeared to be a strong player, and well versed in theory.

The first Bishop sacrifice may not have been decisive 23...Qf4!! seems to hold the game but it would be extremely hard to work out over the board: 24.Bxg7 (24.Be5 is worse axb5 25.Bxf4 Bxf4 26.Qxb5 c3 and the pawn advances) 24...Kxg7 25.Rg5+ Kf6 26.Qh6+ Ke7 27.Re5+ Kd7 28.Qxb6 Rfe8 29.Rd5+ Ke7 30.Re5+ Kd7 31.Rd5+ with a draw.

28...Kf7 also loses after 29.Rh6+ Ke7 30.Rh7+ Kf6 31.Qh6+ Kf5 32.f3 Bg3 33.Rg7 e5 34.Qg6+ Kf4 35.Qe4 mate

Jun-22-05  aw1988: <Chessical> Qf4!!, great discovery. I seriously doubt any human would find that.
Feb-24-09  WhiteRook48: was there a double bishop sacrifice here?!
Mar-23-13  vinidivici: 19.Bg5 is a good move.

if 19...f6? (better just like the game Qc7!) 20.Qf5

Now all the moves bad for black

A) 20...g6 21.Bxg6 Qc7 (21...fxg5/axb5 22.Qxc7# or 21...hxg6 22.Qxg6+ Kh8 23.Bxf6+ Qxf6 24.Rh5#) 22.Rxb6 hxg6 23.Qxg6+ Qg7 24.Qc2!

A1.24...Qxg5 25.Qxc4+ Kh8 26.Rxd6...1-0
A2.24...fxg5 25.Rxd6 (intending Rg6) Kh8 26.Qxc4...1-0 A3.24...Rbc8 25.Rxd6 Qxg5 26.Rd7! Rf7 27.Rxf Kxf 28.Re1 (threatening Qh7) Qh5 29.Qe4 Rf8 30.d5! Kg7 31.d6...1-0

A4.24...Rbd8 25.Qxc4 Qf7 26.Qxf Rxf 27.Be3...1-0

B)20...h6 21.Bxh6

B1.21...axb5 22.Bxg7 Qe7 23.Qh7+ Kf7 24.Bxf6+ 1-0
B2.21..gxh6 then mate in 2... 1-0
B3.21...Rf7 22.Bg6 Rc7 23.Bg5 axb5 24.Re1 Be5 25.Qh7+ Kf8 26.Rxe5...1-0 (if 22...axb5 23.Bxf7+ Kf8 24.Bxg7+...1-0) B4.21...Qc7 22.Rxb6! Qxb6 23.Bxg7 f5 24.Qh8+ Kf7 25.Qh7 Bh2+ 26.Kxh2 Qg6 27.Qxg6+ Kxg6 28.Bxf8...1-0

B4.21..f5 22.Bg5 Qc7 23.Rxf5 Rf7 24.Rc5 (threatening Qh7+) ...1-0

There have to be some lines i didnt put here or i missed those. After 19.Bg5, you CANNOT do 19...f6, It brings fatal consequences after Qh5.

What making it hard is there are so many potential moves once you miss it, you could be deprive all the advantages.

May-17-20  paradoxicalenigma: I was reviewing the Greek Gift Sacrifice and came across this game and all I have to say is that this game is quite lovely. The Petrov defense in its archetypal character kept the game a drawing level. The B×h7 sacrifice did nothing to change it except the fact that it got the opponent FM Machado Jr. On his edge and he failed to find the move 23...Qf4 which was the only one at that point to save the game and I reckon is not easy to find without engine assist.
Nov-27-21  Brenin: 20 Bxh7+ Kxh7 (Kh8 21 Qh5) 21 Qh5+ Kg8 22 Bf6, e.g. 22 ... gxf6 23 Qg4+ and 24 Rh5 mate). Black's best defence seems be 22 ... Bh2+ 23 Kh1 Qd6 24 Bxg7 Kxg7 (else 25 Qh8 mate) 25 Rg4+ Kf6 26 Re1, and I don't see any escape for Black's K, other than the ruinously expensive 26 ... Qe6 or Be5.
Nov-27-21  mel gibson: I wasn't sure,

Stockfish 14.1 says:

20.Bxh7+

(20. Bxh7+ (♗c2xh7+ ♔g8xh7 ♕f3-h5+ ♔h7-g8 ♗g5-f6 ♗d6-h2+ ♔g1-h1 ♕c7-f4 ♗f6xg7 ♔g8xg7 ♖b5-f5 ♕f4-h6 ♕h5-g4+ ♕h6-g6 ♖f5-g5 ♗h2-c7 a4-a5 ♘b6-c8 h3-h4 ♘c8-e7 ♖f1-e1 ♘e7-g8 h4-h5 ♕g6xg5 ♕g4xg5+ ♔g7-h7 g2-g4 ♖b8-d8 ♕g5-c5 ♗c7-d6 ♕c5xc4 ♔h7-h8 g4-g5 ♖d8-d7 d4-d5 f7-f6 ♕c4-g4 ♖f8-d8 ♖e1-e8 f6xg5 ♕g4-d4+ ♔h8-h7 ♕d4-d3+ ♔h7-h8 ♕d3-c3+ ♔h8-h7 ♕c3-c2+ ♔h7-h8 ♕c2-b2+ ♔h8-h7 ♖e8xd8 ♖d7xd8 ♕b2xb7+ ♗d6-e7 ♕b7xa6 ♖d8xd5 ♕a6-c6 ♖d5xa5 ♕c6-c2+ ♔h7-g7 ♕c2-c3+ ♘g8-f6 ♕c3xa5 ♘f6xh5 ♔h1-g2 ♔g7-g6 ♕a5-e5 ♗e7-f6 ♕e5-e8+ ♔g6-h6 ♔g2-f3 ♗f6-g7 ♕e8-c8 ♔h6-g6 ♕c8-c2+ ♔g6-f7) +3.12/47 296)

score for White +3.12 depth 47.

Nov-27-21  EasilyConfused: Does 23. … axb5 refute the attack, forcing White to seek a draw by perpetual check?
Nov-27-21  EasilyConfused: No, after 23. .. axb5 24 Qg5 and black is doomed
Nov-27-21
Premium Chessgames Member
  FSR: 20.Qh5! h6 21.Bxh6! gxh6 22.Rg5+! hxg5 23.Qh7# or 20...g6 21.Bf6! Rfe8 (21...axb5 22.Qh6 followed by Qg7#) 22.Qxh7+! Kxh7 23.Rh5+ Kg8 24.Rh8# is fun. 20...f5 is more resilient and I don't see a forced win for White.

Huh, Kudrin tried a different way (which I didn't see), but apparently 23...Qf4!! would have held.

Nov-27-21  saturn2: The black king is only defended by pawns with no pieces around. I got the first three moves with the idea of sacrificing the two bishops and let the heavy pieces attack the king.
Nov-27-21  saturn2: <FSR 20.Qh5> can also be answered by g6 and black seems to survive.
Nov-27-21  faulty: I must admit, in the game line i see nothing for white if black plays 24... f5
Nov-27-21  saturn2: Oh you had this line 20....g6 but the machine says your 21 Bf6 is met by ....Bf4
Nov-27-21  goodevans: <FSR: [...] apparently 23...Qf4!! would have held.>

At 28 ply the SF annotations say this but at greater depth SF reckons White still has a winning advantage as per <mel gibson>'s post. If you play this through this fairly quickly becomes apparent.

The reason <23...Qf4> is better becomes clear if you look at happened in the game when Black tried to run away with <25...Kf6> (maybe 25...Qg6 would have been better).


click for larger view

White was able to shut the door with <26.Re1>. With the Q on f4 this wouldn't have been possible (26.Re1?? Qxg5).

Nov-27-21  Lambda: 23...Qf4 24.Bxg7 Kxg7 25.Rf5 Qh6 26.Qg4+ Qg6 27.Rg5 Bc7 28.a5 Nc8 29.h4


click for larger view

White is down a queen and a pawn for a rook and two pieces once queen and rook are inevitably exchanged, but nevertheless has a winning long-term attack.

Nov-27-21  AlicesKnight: I found the first 3-4 moves - nice variation on the 2-bishop sacrifice. I missed the full effect of ... Qf4. Not easy for either side over the board.
Nov-27-21
Premium Chessgames Member
  chrisowen: Huey it aorta v Bxh7 hoody v ado no ago quosh blubb i victor huey it aorta v fasten it dt v vamoose glock pebble baroque query evict corny joins ji v uh huey it sanatorium mud v help cog backs evict wit jacks ham it hod v harangue trough hoggies black gives gag icicle flush eg debby brush icicle it din c hoods deaffade q pro v rowsmate gag ie ooh aggregate a delivery nah it back zilch it ebb evict ruffle kuala radiated v i ho da deadched it mag flung cc lad lied it mag ft an go foxtrot site v id commander it fee vehicle narc it cruddy fluke charge it fees geed it fury cacked it fine it crumbled it crufts v lad a lid c v face it gr c branched it o v rich fade it go drift bood it then bob thang evict bush op skats evict high greasy it grey areas ye v goodclam u faced v it crap puck eye it raise in i brows it slow in on uptake am que i pecan i know na tour in it same it sail cram i toos eve it way Bxh7 dainty;
Nov-27-21
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop, a knight and a pawn.

Black threatens axb5.

White can place the queen closer to the black king with tempo, 20.Bxh7+ Kxh7 (20... Kh8 21.Qh5 Rfc8 22.Bf5+ Kg8 23.Qh7+ Kf8 24.Qh8#) 21.Qh5+ Kg8 22.Bf6:

A) 22... axb5 23.Qg5 g6 24.Qh6 and mate in two.

B) 22... Rfc8 23.Rg5 Bf8 24.Qh6 and mate in two.

C) 22... Bf4 23.Rg5 Bxg5 (23... g6 24.Qh8#) 24.Qxg5 as in A.

D) 22... gxf6 23.Qg4+ Kh7(8) 24.Rh5#.

E) 22... Nd7 23.Bxg7

E.1) 23... Kxg7 24.Qg4+ Kf6 (else 25.Rh5#) 25.Qg5+ Ke6 26.d5#.

E.2) 23... f5 24.Qh8+ (24.Qg6 Ne5 25.Rxe5 Qxg7 26.Qxd6 wins a pawn) 24... Kf7 25.Rxf5+

E.2.a) 25... Kg6 26.Qh6+ Kxf5 27.Re1 Bg3 (due to 28.g4#) 28.Qe6+ Kf4(g5) 29.Qg4#.

E.2.b) 25... Ke6 26.Re1+

E.2.b.i) 26... Kxf5 27.Qh5+ Kf4 28.g3#.

E.2.b.ii) 26... Ne5 27.Rxf8 Bxf8 28.Bxf8 wins decisive material.

E.2.b.iii) 26... Be5 27.Rxf8 as above.

E.2.c) 25... Ke7 26.Bxf8+ (or 26.Qh4+) followed by 27.Re1+ seems to win decisive material.

E.2.d) 25... Ke8 26.Re1+ is similar to E.2.c.

E.3) 23... f6 24.Bxf6

E.3.a) 24... Nxf6 25.Rg5#.

E.3.b) 24... Rxf6 25.Rg5+ Kf8 26.Re1 Be5 (26... Ne5 27.dxe5 seems to win decisive material) 27.dxe5 recovers material while keeping the attack. For example, 27... Rb6 (27... Rf7 28.e6; 27... Re6 28.Qh8+ Kf(e)7 29.Rg7#) 28.e6 Nf6 29.e7+ Qxe7 30.Qh8+ Kf7 31.Rg7#.

Nov-27-21
Premium Chessgames Member
  agb2002: I saw Bf4 and should have seen Qf4 after Bh2+.

I also missed 25... Qg7 in my line E.3.a.

Nov-27-21
Premium Chessgames Member
  drollere: curiously, my earlier post does not appear. too much turkey, perhaps.

i had 20. Bxh7+ Kxh7, 21. Qh5+ Kg8, 22. Bf6 but left off there because i was unsure how black would reply. (22. .. pxf6 leads to 23. Qg4+ and 24. Rh5#.)

Nov-27-21  awfulhangover: Black had a draw if 23.- Qf4!! Comps can create artistic savings.
Nov-27-21  goodevans: <awfulhangover: Black had a draw if 23.- Qf4!! Comps can create artistic savings.>

Oh, okay. I'll just take your word for it then. What I looked at this morning must have been a mirage.

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