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Stefano Rosselli del Turco vs Karel Treybal
World Amateur Championship (1928), The Hague NED, rd 9, Jul-29
Queen's Gambit Declined: Capablanca - General (D30)  ·  0-1

ANALYSIS [x]

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sac: 34...Bxg2 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Dec-18-19  Nullifidian: The clearance sac of 34... ♗xf2 was just too obvious. Now if white makes a stupid move like 35. ♙axb5 it's mate in 2 with a beautiful dovetail mate (assuming white takes the proffered bishop): 35... ♖xe1+ 36. ♔xg2 ♕f1#.

If white isn't stupid, then he has two move orders that produce the same position:

35. ♔xg2 ♖xe1 36. ♖xd3 ♖8e2+ 37. ♔f3 and now black has the pleasant choice of either taking the queen outright or playing ♙xd3 and obtaining a passed pawn on the third rank. The same thing occurs if white plays 35. ♖xd3 ♖xe1+ 36. ♔xg2 ♖8e2+. Either way, it's a won position whether you choose to take the queen or play ♙xd3 and regardless of the move order.

Dec-18-19
Premium Chessgames Member
  agb2002: Black has a bishop and a pawn for a knight.

White threatens Rxd3 and axb5.

The possible alignment of the white king and queen on the second rank suggests 34... Bxg2:

A) 35.Rxd3 Rxe1+

A.1) 36.Kxg2 R1e2+ 37.Qxe2 (else 37... Rxb2 - + [r+p]) 37... Rxe2+ followed by 38... cxd3 - + [r+p].

A.2) 36.Kf2 R8e2+ 37.Qxe2 Rxe2+ 38.Kxe2 cxd3+ - [b+p].

B) 35.Rxe7 Qf1#.

C) 35.Kxg2 Rxe1

C.1) 36.Rxd3 R1e2+ transposes to A.1.

C.2) 36.Rf2 Qe4+ wins.

D) 35.Rxg2 Rxe1+ 36.Kf2 R8e2+ 37.Qxe2 Qxe2#.

Dec-18-19  saturn2: 34...Bxg2 wins material or mates

35. Rxd3 Rxe1+ 36. Kxg2 R8e2+ 37. Qxe2 Rxe2+ 38.-  Kf3 cxd3

35. Kxg2 Rxe1 36. Rxd3 R1e2+ 37. Qxe2 Rxe2+ 38. - Kf3 cxd3

35. Red1 Qf3 

35. Rxg2 Rxe1+ 36. Kf2 Qf1# 

Dec-18-19  saturn2: After 34...Bxg2 35. Red1 instead of Qf3
Re1+ is better
36. Kxg2 Qf1# or
36. Rxe1 Rxe1+ 37. Kxg2 Qf1#
Dec-18-19  mel gibson: I wasn't sure about this one -
I didn't see that a passed pawn would be created to completely change the game.

Stockfish 10 says mate in 13:

34... Bxg2

(34. .. Bxg2 (♗e4xg2 ♖d2xd3 ♖e7xe1+ ♔g1xg2
c4xd3 ♔g2-f3 h6-h5 ♕b2-a2+ ♔g8-g7 ♔f3-f2 ♖e1-e2+ ♕a2xe2 ♖e8xe2+ ♔f2-f3 ♖e2-e7 ♔f3-f2 d3-d2 g3-g4 d2-d1♕ g4xh5 ♖e7-e2+ ♔f2-f3 ♕d1-d3+ ♔f3-g4 ♖e2-g2+) +M13/57 86)

Dec-18-19  patzer2: For today's Wednesday (34...?) puzzle, I immediately went for the clearly decisive 34...Bxg2! -+ (Mate-in-16, Stockfish 10 @ 42 ply).

P.S.: White's decisive mistake was 30. Rde2? allowing 30...Bg6 -+ (-2.45 @ 37 ply, Stockfish 10).

Instead, 30. Rf1! Rxe4 31. g4 +- (+2.18 @ 29 ply, Stockfish 10) turns the tables and gives White a won position.

Dec-18-19  Walter Glattke: Forcible material win with 34.Bxg2 Rxd3 35.Rxe1+ Kxg2 36.R8e2+ Qxe2 37.Rxe2+ Kf3 38.cxd3 guards e2, so 1 rook and 1 pawn more. B)35.Rxe7 Qf1# C) 35.Kxg2 Rxe1 as above
Dec-18-19
Premium Chessgames Member
  malt: Have 34...B:g2 35.R:d3

(34.K:g2 R:e1 35.R:d3 R8e2+ 36.Q:e2 R:e2+ 37.Kf1 cd3 )

35...R:e1+ 36.K:g2 R8e2+ 37.Q:e2 R:e2+ 38.Kf1 cd3 39.ab5 cb5

Dec-18-19  schachfuchs: I also went for the easy 34...Bxg2 35.Rxd3 Rxe1+ 36.Kxg2 R8e2+ 36.Qxe2 Rxe2+ 37.Kf3 cxd3, not bothering about the "passed pawn" line 36...cxd3 of <mel gibson>/Stockfish 10
Dec-18-19  Diana Fernanda: Not eating the knight with the bishop would be a crime.
Dec-18-19  King.Arthur.Brazil: Dear <chrisowen> be-what-a link hell-link that-link you think, when Jacqueline its keinlink or what-a- link bug-link youresay ing, if-link instead-link play the-link big-link move-ninc 34.axb5, it fol-link lows-link: 34...♗xg2 35.♖xe7 ♖xe7 36.♔xg2 cxb5 and-link black-link has-link theadva ntage-link andI didn 'tlike thisbo ring irritating language, end of ink in the trip, blink drink stink, what a-hell doyou think Jackline or nonline please-link, don't-link answer-link back! (If he does understand anything that I wrote before, I deserve a title of genius... lgs, the first human trying the 3rd degree immediate contact using chess).
Dec-18-19
Premium Chessgames Member
  chrisowen: <King.Arthur.Brazil> Hub of the green!
Dec-18-19  Damenlaeuferbauer: After long pondering, my old Czech friend Karel, who tragically died through the German occupation of the so-called "Protektorat Böhmen und Mähren" (former Czechoslovakia without the "Sudetenland") from spring 1939 to spring 1945, finally found 34.-,Bxg2! 35.Rxd3 (35.Rxe7,Qf1#; 35.Rxg2,Rxe1+ 36.Kf2,Qf1#; 35.Kxg2,Rxe1 36.Rxd3,R8e2+ 37.Qxe2,Rxe2+ 38.Kf1/Kf3,cxd3 -+) 35.-,Rxe1+ 36.Kxg2,R8e2+ 37.Qxe2,Rxe2+ 38.Kf1/Kf3,cxd3 -+. May he rest in peace!
Dec-18-19  TheaN: I made this harder than it had to be, initially I missed the mate on f1 after 34....Bxg2 35.Rxe7? Qf1#, as after 35....Rxe7? 36.Rxd3! draws, even though it's risky as hell after 36....cxd3 37.Qb1! and Black's forced to do something to Qxd3; anything else pretty much loses to Re2.

After seeing the idea of Qf1 it's relatively easy though, as the Black rooks are just too strong. The key's that Black can throw her majesty after 37.Rxd3 Rxe1+ 38.Kxg2 R8e2+ 39.Kh3 (Kf3 Rxb2 -+ and White's forced to trade the last piece) Rxb2 40.Rf3 Re4 41.g4 -+ and take your pick, as White's pretty much tangled.

Dec-19-19
Premium Chessgames Member
  Diademas: <Damenlaeuferbauer: After long pondering, my old Czech friend Karel, who tragically died through the German occupation of the so-called "Protektorat Böhmen und Mähren" (former Czechoslovakia without the "Sudetenland") from spring 1939 to spring 1945, finally found 34.-,Bxg2! [...]>

What are you talking about?
According to your bio you're 52 years old. Treybal died in 1941.

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