Adolf Schwarz vs Henry Bird (1873)

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Adolf Schwarz vs Henry Bird
Vienna (1873), Vienna AUT, rd 11, Aug-25
Four Knights Game: Italian Variation (C46) · 0-1

ANALYSIS [x]

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Nov-29-17		Whitehat1963: Didn’t see it at all.

Nov-29-17		patzer2: For today's Wednesday puzzle (31. ?), I found 31. Rxg6! +- which White missed in this game. However, I don't claim full credit for solving it because I had difficulty with a tricky follow-up move. I saw the initial part of the winning combination with 31. Rxg6! fxg6 (31...Kxg6 32. Qg4+ Kh7 33. Qg7#) 32. Rd7+ +- (diagram below): click for larger view What I did not see there (diagram above) was Black's tricky defense 32...Rf7 33. Rxf7+ Kg8 (diagram below): click for larger view Here (diagram above), I failed to find White's only winning move 34. Rd7! +- (+18.17 @ 26 ply, Stockfish 8). Instead, my weak attempt was 34. Rg7+? which allows 34...Kf8 = (0.00 @ 34 ply, Stockfish 8). P.S.: Black made a potentially losing error in calculation with 28...Nxd5?, allowing 29. Rg2 +- (+1.75 @ 31 ply, Stockfish 8). Instead, 28...Qxc2+ 29. Rd2 Qc3 = (0.00 @ 32 ply, Stockfish 8) holds the position level. After missing the winning combination with 31. Rxg6! +- (+60.31 @ 38 ply, Stockfish 8), White's final decisive mistake was 35. h5? allowing 36...Rxe5 -+ (-2.55 @ 27 ply, Stockfish 8). Instead, 36 Rg3 ⩱ (-0.42 @ 29 ply, Stockfish 8) gives White drawing chances.

Nov-29-17		patzer2: In the declined line 31. Rxg6! Qxc2+, (diagram below) click for larger view White has to give up one of his Rooks. Either the Rook on g6 or the Rook on d3 will be lost. So which Rook does White sacrifice? It's not the Rook on g6, as 32. Rd2? Qxg6 33. Rg2 Qh5 -+ (-26.00 @ 26 ply, Stockfish 8) turns the tables and throws away the win. Instead, giving up the Rook on d3 is the solution as 32. Rg2! Qxc3 (32...Qxg2 33. Kxg2 +-) 33. Rg7+ Kh8 34. Qxh6+ Qh7 35. Qxh7# is a decisive threat.

Nov-29-17		steinitzfan: Patzer2 -I'm going to give myself a 90 for this one even though I missed that 32Rd2 hangs the g6 rook. I'm getting a little better with the Wednesday puzzles.

Nov-29-17		patzer2: <agb2002> After 31. Rxg6! fxg6 32. Rd7+ Rf7 33. Rxf7+ Kg8 34. Re7 Rxe7 (your C.3 variation) 35. fxe7 Qxc2+ 36. Kg3 (diagram below) click for larger view Black can apparently force a draw with 36...Qd3+ (0.00 @ 46 ply, Stockfish 8). P.S.: After 31. Rxg6! fxg6 32. Rd7+ Rf7 33. Rxf7+ Kg8, the winning move (which I also missed with 34. Rg7+? Kf8 = ) is 34. Rd7! +- (+18.17 @ 26 ply, Stockfish 8).

Nov-29-17		malt: 31.R:g6! fg6 (31...Q:c2+ 32.Rg2 Q:d3 33.Rg7+ Kh8 34.Q:h6+ Qh7 35.Q:h7#) 32.Rd7+ Rf7 33.R:f7+ Kg8 34.Rd7 (34.Rg7+? Kf8 White needs a tempo with threats of ...Q:c2 /...Q:e5)

Nov-29-17		mel gibson: I saw the correct move but not all the sequence. The computer says: (31. Rxg6 (♖g2xg6 f7xg6 ♖d3-d7+ ♖f8-f7 ♖d7xf7+ ♔h7-g8 ♖f7-d7 ♕b2xc2+ ♔h2-g3 ♕c2-c3+ ♔g3-g4 ♔g8-f8 ♕f4xh6+ ♔f8-e8 ♖d7-d2 ♖e6xf6 e5xf6 ♕c3xf6 ♕h6-e3+ ♕f6-e7 ♕e3-d3 ♕e7-e6+ ♔g4-g3 ♕e6-e5+ ♔g3-g2 ♔e8-f7 ♕d3-f3+ ♔f7-e6 ♖d2-e2 ♕e5xe2+ ♕f3xe2+) +12.89/19 195) score for White +12.89 depth 19

Nov-29-17		whiteshark: REQUEST ANALYSIS click for larger view White to move 1) +128.29 (47 ply) 31.Rxg6 fxg6 32.Rd7+ Rf7 33.Rxf7+ Kg8 34.Rd7 Qxc2+ 35.Kg3 Qc3+ 36.Kg4 Kf8 37.Qxh6+ Ke8 38.Qxg6+ Kxd7 39.Qf7+ Kd8 40.Qxe6 Qd4+ 41.Kh5 Qd1+ 42.Kg6 Qd3+ 43.Kg7 Qg3+ 44.Kf8 b6 45.f7 Qd3 46.Qd6+ Qxd6+ 47.exd6 Kd7 48.Kg7 Kxd6 49.f8=Q+ Kc7 50.Qe7+ Kb8 51.Qd8+ Kb7 52.Qd7+ Ka6 53.a4 c4 54.Qc8+ Ka5 55.Qxc4 a6 56.Qxa6+ Kb4 57.Qxb6+ 2 hours of chessgames.com-originated analysis by Stockfish 8 v270317

Nov-29-17		njchess: Rxg6 comes readily enough. Black must take with the pawn or all is lost. But then what? Took me a while to see Rd7+ wins back the rook and gains the passed pawn. True, White has an advantage, but is it enough to win? White's king is badly exposed. Perhaps if he plays perfectly, he could win but it is unclear to me. The e-pawn falls and queens are exchanged. Then, I think you are in the world of rook-pawn endings with a tempo and slight positional edge to White.

Nov-29-17		patzer2: <Steinitzfan> Good job finding the initial 31. Rxg6! solution for today's puzzle combination. I suspect most of us who found 31. Rxg6! got lost at some point in one of the follow-up variations. As <cocker> observes, this was <very hard for a Wednesday.>

Nov-29-17		kevin86: White's attack runs out of gas, black takes over.

Nov-29-17		Check It Out: 31.c3 Got it!

Nov-29-17		Jimfromprovidence: <cocker> <Very hard for a Wednesday, but unfortunately what we have become used to. After 31 Rxg6 fxg6 32 Rd7+ Rf7 33 Rxf7+ Kg8, White must find the only winning move 34 Rd7. This cannot possibly be considered 'Medium/Easy'.> The position below after 34 Rd7 wins because black's queen cannot check on the d file, which would allow black to force a perpetual. click for larger view To demonstrate this try 34 Rc7, below, instead. click for larger view Now it's black to move and draw.

Nov-29-17		varishnakov: I got 31.Rxg6 fxg6 32. Rd7+ Rf7 33.Rxf7+ Kg8 and then racked my brain after the obvious followup 34.Rg7+ Kg8 35.Qxh6 allows black to do all sorts of checking things I eventually went with 34.Re7, assuming that's the key move. From previous comments, I know I was mistaken. Maybe if I were to play it over the board, I would find Rd7 on the move before--having a draw in hand is sufficient to play the combination

Nov-29-17		Lambda: Auto-search finds another line which it likes (though less so) for white: 31.Rxg6 fxg6 32.Rd7+ Rf7 33.Rxf7+ Kg8 <34.Rf8+!?> Kxf8 35.Qxh6+ Ke8 36.Qxg6+ Kd8 37.Qg8+ Re8 38.Qd5+ Kc7 39.Qxc5+ Kd7 40.f7 Rxe5 41.Qf2 Re8 42.Qf5+ Kd8 43.fxe8=N Kxe8 44.Qe4+ Kf7 45.a4 Kg7 46.Kg2 Kg8 click for larger view

Nov-29-17		Marmot PFL: White rejects the rook sac Rxg6 due to Qxc2+ and Qxd3 or Qxg6 next, but doesn't look far enough. 31 Rxg6 Qxc2+ 32 Rg2 Qxd3 33 Rg7+ and wins. other defenses also fail, the most tenacious being probably 31...fg6 32 Rd7+ Rf7 to give the king time to escape, but only for a while.

Nov-29-17		agb2002: <patzer2> I thought the pawn on h6 had already been eliminated, probably due to a residual image, or the like.

Nov-29-17		FSR: saturn2: you are quite right - judging by the later comments, apparently White has to then find 34. Rd7!! in order to win. Good find!

Nov-29-17		WorstPlayerEver: Interesting position. Of all pieces, the Rooks are the most mysterious ones.

Nov-29-17		BOSTER: Playing this game in 1873 y. I'd say move c3 was great.

Nov-29-17		maxi: Very interesting solution. The rook make a breach in the wall (removes the g6 pawn) and has to retreat because of the queen check. What makes it hard to find the finish is to see that the queen cannot maintain the check and the rook is free to go on its way.

Nov-29-17		DarthStapler: Got it

Nov-29-17		Bubo bubo: I found 31.Rxg6, threatening Qxh6#. Now three of Black's possible replies are easy: A) 31...Kxg6 32.Qe4+ Kg5 33.Rg3+ Kh5 34.Qg4# B) 31...Qxc2+ 32.Rg2, and the black queen must not retreat in order to avoid 33.Rg7+ Kh8 34.Qxh6# C) 31...Qxe5 32.Rxh6+ Kg8 33.Rg3+ Qg5 34.Rxg5# But I missed the winning continuation if Black plays D) 31...fxg6 32.Rd7+ Rf7! (not 32...Kg8 33.Rg7+ Kh8 34.Qxh6#) 33.Rxf7+ Kg8. Now 34.Qxh6 fails to the deadly Qxe5+, and after 34.Rg7+ Kf8 White is out of useful checks; 35.Qxh6 is still impossible, 35.f7 Qxc2+ gives Black a perpetual, and 35.Rxg6 Qxe5 allows Black to exchange queens while he is still up a pawn (and the white queenside pawns are very weak). Unfortunately, I did not examine 34.Rd7 thoroughly; my only other attempt was 34.Rf8+!? Kxf8 (not 34...Kh7 35.Rh8+ Kxh8 36.Qxh6+ Kg8 37.Qg7#) 35.Qxh6+ Ke8 (not 35...Kf7 36.Qg7+ Ke8 37.f7+ and White queens with check) 36.Qxg6+ Kd8 (37...Kd7 38.Qf7+ loses the rook) 37.Qg8+ Re8 38.Qd5+ Kc7 39.Qxc5+ Kd7. Now the queen guards e5 and c2, and so White can win back the rook with 40.f7. But since the pawn will promote without check, Black can reply 40...Rxe5, and White has gained (nearly) nothing...

Dec-02-17		al wazir: <beatgiant: what's the followup to <36...Rg6>?> There doesn't seem to be one. Thanks.

Sep-10-21		naresb: Position after 19... g6 look interesting, not an immediate motif sort of but with central pawn mass, opening of lines, attack-defence etc.

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