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Jonathan Penrose vs Milko Bobotsov
Palma de Mallorca (1969), Palma ESP, rd 8, Dec-01
Alekhine Defense: Modern Variation. Main Line (B05)  ·  1-0



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sac: 22.Bxg7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Jan-11-08  TrueBlue: the 22. Rd5 Nxc3 gives clear advantage to white. Maybe your silicon brains don't show it, but a queen is extremely strong in such an endgame position.
Jan-11-08  whiteshark: After <22.Bxg7 Kxg7 23.Rd5 Qb6> there is also the tricky <24.Rf5!!>

click for larger view

with <24...Qc7 25.Qg3+! >

or <24...Re7> (blocking a flight square) <25.Qg3+ Kf8 26.Rg5! Re5 27.Rg8+ Ke7 28.Rxa8 >

or <24...f6> but now <25.Rxh5! Rh8 26.Rb5> and infiltrating via b7

Jan-11-08  hovik2003: So much analysis for onesided game, black's position is hopeless no matter what white plays either Rd5 and Bxg7 have the same result.
Jan-11-08  zb2cr: I only get 1/2 credit. I got the initial moves, but I missed Black's possible defense 25. ... Qc3--so I didn't prepare anything for it.
Jan-11-08  wals: Lets find attacking moves. Whites has a superior pawn structure. 1.Rd1-d5 attacks the queen and h5 pawn..Qb5 (Qc6)
2.Bxg7...Kxg7 3.Rg5+ ...Kf8 4.Qxh5
check the results...
On the track sort of but lacking in finesse.
Jan-11-08  DarthStapler: I thought of Rd5 first
Jan-12-08  alphee: It was clear to me that the 2 main action points would be d5 and g7 but without a board I could not decide between the 2 following variations.

22. Rd5 Qc6 23.Bxg7 Kxg7 24. Rg5+ Kf8 25. Qf6
22. Bxg7 Kxg7 23. Rd5 Qc6 24. Rg5+ Kf8 25. Qf6

May be I missed something in the first one but it would have left to something like 25.... Re7 26. Qg7+ Ke8 27. Qg8+ Kd7 28. Qxa8. Not sure which one I would have played, may be 22.Bxg7 to get the king out of its protecting wall first.

Dec-09-22  jrredfield: I saw 22 Bxg7 Kxg7 23 Rd5 right away. After that there are various lines which are hard for me to determine as clearly superior or not. Black can respond with 23 ... Re6 or 23 ... Qb4. It got a little too deep for me to go beyond that point with any certainty.
Dec-09-22  Brenin: I saw the game continuation 22 Bxg7 Kxg7 23 Rd5 Qb4 24 Rg4+ Kf8 25 Qf6, but I didn't see or expect 25 ... Qc3. At the end, 27 ... Ke8 28 Rg8+ Kd7 29 Rd1+ Kc7 30 Qd6 is mate.
Dec-09-22  Brenin: 23 ... Qb6 would have been better than Qb4, allowing 24 Rg4+ Kf8 25 Qf6 Qd8, when White seems to have nothing better than picking up another P with 26 Qg7+ Ke7 27 Rxh5. Now it's not clear to me whether his attack is worth the sacrificed piece.
Dec-09-22  Mississaugan: what is your take chrishowen?
Premium Chessgames Member
  An Englishman: Good Evening: Black must have seen the first move of White's combination and missed something crucial later. Perhaps 25.Qf6.
Dec-09-22  EasilyConfused: I think 23 . . Qc8 is a much better defense for Black than the game line. It allows eg 25. . Rd6 and then the Black King is safe. Without Q on back rank, Black is susceptible to skewer losing the other Rook
Premium Chessgames Member
  Honza Cervenka: <EasilyConfused: I think 23 . . Qc8 is a much better defense for Black than the game line.>

After 23...Qc8 white wins instantly with 24.Qg3+ Kf8 25.Qxd6+ Re7 26.Qh6+ with a mate in next move.

Dec-09-22  mel gibson: I saw that within 5 seconds.

Stockfish 15 says:

22. Bxg7

(22. Bxg7 (♗c3xg7 ♔g8xg7 ♖d1-d5 ♕c5-b6 ♖d5-f5
♕b6-c7 ♕f3-g3+ ♔g7-f8 ♖f5xh5 ♔f8-e7 ♖f1-e1+ ♔e7-d7 ♕g3-g4+ ♖e8-e6 ♖e1xe6 f7xe6 ♖h5-h7+ ♔d7-c6 ♖h7xc7+ ♔c6xc7 ♕g4-g7+ ♔c7-c6 ♕g7-a1 ♖a8-d8 ♕a1xa2 d6-d5 ♔g1-f1 ♖d8-d7 ♕a2-a4+ ♔c6-d6 ♕a4-b4+ ♔d6-e5 g2-g4 d5-d4 ♔f1-e2 ♔e5-f6 h3-h4 ♔f6-g7 ♕b4-c5 a7-a5 ♕c5-e5+ ♔g7-h7 ♔e2-d3 ♖d7-g7 ♕e5-e4+ ♔h7-h8 ♕e4xe6 ♖g7-e7 ♕e6xe7 b7-b6 ♕e7-f6+ ♔h8-g8 ♕f6xb6) +9.24/39 918)

score for White +9.24 depth 39.

Premium Chessgames Member
  Honza Cervenka: <<EasilyConfused: I think 23 . . Qc8 is a much better defense for Black than the game line.>

After 23...Qc8 white wins instantly with 24.Qg3+ Kf8 25.Qxd6+ Re7 26.Qh6+ with a mate in next move.>

And if 23...Qc8 24.Qg3+ Kf6, then 25.Qg5+ Ke6 26.Qh6+ f6 (the only move avoiding mate in 1) 27.Qh7 f5 (avoiding threat 28.Re1#) 28.Qg6+ Ke7 29.Qg7+ Kd8 30.Rxd6+ with a mate in next move.

Dec-09-22  sfm: An easy combination, probably nobody would think that an isolated black king would be likely to able to defend himself against a queen and a rook (even though he sometimes just happens to be able to).

The line after 9.h3,Bxf3 seems to be dificult for Black, if Black if forced to answer d4-d5 with exd. The hole on d5 and the backwards d6-pawn is hard to deal with. Maybe rather 9.h3,Bh5

<EasilyConfused: I think 23 . . Qc8 is a much better defense for Black than the game line. > I also looked at that as first choice. However, after 24.Qg3+ it's over.

Dec-09-22  Cheapo by the Dozen: I was thinking 23 ... Qc7 for Black's defense. Perhaps both Black and I overestimated the importance of Qf6 to keep the f7 pawn in place.
Premium Chessgames Member
  scormus: Continuing the theme of more than one road to Rome. 22 Bxg7 looked obvious, whatever the reply the B is defenceless and will be fored to give up the Q after 23 Rd5.

I was interested to see how the immediate 22 Rd5 pans out. The best reply appears to be ... Nxc3, also giving up the Q for both R and B. But B can save the N with 23 ... Ne2+ before taking the R, which I didn't notice at first sight. Nowhere near as strong as the text.

Dec-09-22  Cellist: I thought that both Bxg7 and an immediate Rd5 would likely be winning but decided the former was slightly better (it actually is MUCH better according to the engine). I saw the beginning of the combination quickly, but the rest was hard, although, as others have said, there are many ways to Rome.
Premium Chessgames Member
  chrisowen: Elo juices fad v Bxg7 acid mind aog jah it's a fog pug body tad dud farm Bxg7 do;
Dec-09-22  Chesschronicle22: Nice! I got it.
Quite rare I got a friday right.
Dec-09-22  TheaN: Not a very tough Friday, by lack of options (CG, <really> check the alternatives, because how hard a puzzle continuation could be, if there's only one starting move it eventually plays itself). I did not play it optimally but should be enough for the win.

<22.Bxg7! +-> looks odd at first glance: White has the better piece, and king side destruction is not really necessary. However, the issue with the primary alternative 22.Rd5 is 22....Nxc3! 23.Rxc5 Ne2+ 24.Kh2 dxc5 ±. White's better but it's not easy to play.

<22....Kxg7> this doesn't leave many options, as Black doesn't have Nxc3. Here, I played <23.Qg3+?!> first, given <23....Kf8 24.Rd5 Qb6 25.Rxh5 ± to +-> is strong for White. In hindsight, leaving the checks as threats is much better, 23.Rd5! +- with the game line shows why the queen's better on the f-file.

Premium Chessgames Member
  agb2002: White has a bishop for a knight and a pawn.

White can try to trap the knight with 22.Rd5:

A) 22... Qc7 23.Bd2 Qb6 24.Ra1 Nb4 (24... Qxa6 25.Ra5) 25.Rb5 wins the knight.

B) 22... Qb6 23.Bd2 a6 24.Ba5 and 25.Ra1.

C) 22... Qa3 23.Bxg7 Kxg7 (due to Qg3) 24.Rg5+ Kf8 (else 25.Qxh5#) 25.Qf6 Re6 (due to Rxh5-h8#) 26.Qh8+ Ke7 27.Qxa8 wins an exchange.

D) 22... Nxc3 23.Rxc5 Ne2+ 24.Kh2 dxc5 25.Rxh5 must be winning.

Premium Chessgames Member
  agb2002: I missed the rather obvious 23... a5 in my line A, although 24.Rxh5 looks very for White.
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