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David Bronstein vs Raymond Keene
Teesside (1975), Middlesbrough ENG, rd 1, Sep-01
Catalan Opening: Closed Variation (E01)  ·  1-0


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sac: 24.Rxd5 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  ChessHigherCat: howz about dis?

23. Rxd5 Qxd5 24. Ne5 Qe6 25. Rd1 (threatening to pin the queen) fxe5 26. Bd5 exf4 27. Bxe6#

Premium Chessgames Member
  ChessHigherCat: Curses, foiled again! My line loses to Qxd5.
Keene to lose
Jul-22-18  landshark: Ok here's a rare stab at a Sunday puzzle before bedtime on Saturday - 23.Ng5, Bxg2 24.Rxd7, Bh8 25.f3. I think this keeps the attack going nicely. Not going to bother pre-analyzing stuff - let's see how far I can get playing guess-the-move....
Jul-22-18  landshark: Cool I got the first move right. Will look at what to do after Black's .... Rc5 tomorrow (:
Jul-22-18  Walter Glattke: 23.Rxd5 Qxd5 24.Nd4 (24.Ne5 Qd6!) Qd6 25.Qxd6 Bxd6 26.Bd5+ Kh8 27.Nd6 cxb3 28.Nxc7 Rxc7 no check on c1, so failed by29.Re8+ Kg7 30.Rg8+ Kh6 31.axb3 perhaps draw.
Premium Chessgames Member
  diagonalley: i think i'll go back to bed
Jul-22-18  Walter Glattke: Black wins after 23.Ng5 fxg5 24.Bxd5+ Qxd5 25.Qxc7 Qxd1 26.Rxd1 Rxc7 28.cxb3 1 knight ahead.

24.Qd4 Nf6 (24.-Bxg2? 25.Qh8+ Kf7 26.Qxh7+ Bg7 27.Qxg7#) 25.Bxd5+ Qxd5 26.Qxf6 Bg7 27.Qxg7+ Rxg7 28.Rxd5 now 1 bishop for white.

Jul-22-18  Walter Glattke: Really hard this morning.
Jul-22-18  Honey Blend: I was trying to make <23. ♗h3> work, with the idea that 23. ... ♗xf3 24. ♗e6+ ♔g7 25. ♖xd7+! ♖xd7 26. ♕xf6+:

click for larger view

After 26. ... ♔h6 27. ♗c1+ and mate follows.

Or 23. ♗h3 g5 24. ♘xg5! fxg5 25. ♕xg5+ ♔f7 26. ♕f5+ ♔g8 27. ♕e6+! ♗xe6 28. ♗xe6#

click for larger view

Probably best reply here is 23. ... c3, and after 24. ♗xc3 ♖xc3 25. ♖xd5, now Black can't recapture the ♖ because of the fork 26. ♗e6+.

click for larger view

The ♘d7 is attacked twice and pinned by the ♗h3, so 25. ... ♘c5 looks like the best place for it. After 26. ♕d2 (protecting the ♖) ♖xf3 27. ♗xc8 ♖xc8 28. ♖d8!, Black has to play very carefully. For example, 28. ... ♕c6 29. ♖xf8+! ♔xf8 30. ♕h6+ ♔g8 31. ♖e7! with inevitable mate.

click for larger view

Either that, or 28. ... ♕c7 29. ♖ee8 looks crushing.

Jul-22-18  Honey Blend: <After 26. ♕d2 (protecting the ♖) ♖xf3 27. ♗xc8 ♖xc8 28. ♖d8!, Black has to play very carefully.>

Oops. That was supposed to be 26. ♕d2 ♖xf3 27. ♗xc8 ♕xc8 28. ♖d8

click for larger view

Premium Chessgames Member
  takchess: Nice tension in the position. Intuition suggested RxB or a Knight move .thats all for me.
Jul-22-18  mel gibson: I considered the text move but saw that White would lose it's Bishop.

Stockfish 9 disagrees with the text -
it says 23 Bh3.

23. Ng5 (23. Bh3 (♗g2-h3 c4-c3 ♗b2xc3 ♖c7xc3
♖d1xd5 ♕a8xd5 ♗h3-e6+ ♕d5xe6 ♖e1xe6 ♖c3-d3 ♔g1-g2 ♖c8-c3 ♘f3-d4 ♗f8-c5 ♖e6-e8+ ♔g8-f7 ♕f4-e4 ♘d7-e5 ♖e8xe5 f6xe5 ♕e4-d5+ ♔f7-f8 ♘d4-e6+ ♔f8-e7 ♕d5xe5 ♗c5-d6 ♕e5-e4 ♔e7-d7 ♘e6-d4 ♖d3xd4 ♕e4xd4 ♖c3-c7 ♕d4-d5 ♔d7-e7 b3-b4 ♖c7-d7 f2-f4 ♗d6-c7 ♕d5-e4+ ♔e7-f6 ♔g2-f3 ♗c7-d6 ♕e4-c6 ♔f6-e6 ♕c6-c8 ♔e6-e7 ♕c8-h8 ♔e7-e6 ♕h8-d4 ♖d7-c7 a2-a3 ♖c7-d7 g3-g4 ♔e6-f7 ♕d4-c4+ ♔f7-f6 g4-g5+ ♔f6-e7 ♔f3-g3) +3.49/35 133)

score for White +3.49 depth 35

forcing Stockfish to look at the text move 23.Ng5 we have:

(23.Ng5 .. Bxg2

♖d1xd7 ♗g2-h3 ♘g5xh3 ♖c7xd7 ♕f4xf6 c4-c3 ♗b2xc3 ♖c8xc3 ♕f6xc3 ♗f8-h6 ♕c3-e5 ♕a8-f8 ♘h3-g5 ♗h6xg5 ♕e5xg5 ♕f8-d6 h2-h4 ♖d7-f7 ♕g5-c1 ♕d6-d4 ♖e1-e8+ ♔g8-g7 ♕c1-e1 ♖f7-d7 ♔g1-h2 ♖d7-f7 ♖e8-e2 ♔g7-g8 ♔h2-g1 ♖f7-d7 ♔g1-g2 ♖d7-f7 ♖e2-e8+ ♔g8-g7 ♕e1-e2 h7-h5 b3-b4 ♔g7-h6 b4-b5 ♕d4-d5+ f2-f3 ♖f7-d7 ♖e8-h8+ ♔h6-g7 ♕e2-b2+ ♕d5-d4) -1.07/39 97)

score for Black -1.07 depth 39

Jul-22-18  WorstPlayerEver: First I tried to make 23. Ne5 Bxg2 24. Nxd7 Rxd7 25. Rxd7 work, but it fails: 25... Bh3, wot a disappointment!

Looked briefly at other solutions. Then I gave up. However, when I peeped at the real solutions, it gave me new hope. Not bad, not bad.

Premium Chessgames Member
  malt: I got 23.Ng5 B:g2 24.R:d7 Black has
(24...fg5 25.Qf7# )
(24...R:d7 25.Q:f6 Bg7 26.Qe6+ Kh8 27.Q:d7 c3 28.B:c3 R:c3 29.Re8+ )

Struggling with 24...Bh3 looking at

Premium Chessgames Member
  agb2002: White is one pawn down.

Black threatens cxb3 and c3.

The black castle looks weak and White's LSB x-rays the black queen. These details suggest 23.Ng5:

A) 23... fxg5 24.Qd4

A.1) 24... Bxg2 25.Qh8+ Kf7 26.Qh7+ Bg7 27.Qxg7#.

A.2) 24... Nf6 25.Qxf6 Bg7 26.Bxd5+ Qxd5 (26... Kh8 27.Bxa8 Bxf6 28.Bxf6+ wins decisive material) 27.Rxd5 Bxf6 28.Bxf6 + - [B vs p].

B) 23... Bxg2 24.Rxd7

B.1) 24... Rxd7 25.Qxf6

B.1.a) 25... Bg7 26.Qe6+ Kh8 (26... Kf8 27.Qxd7 wins) 27.Qxd7 Rg8 (27... Bxb2 28.Qxh7#) 28.Bxg7+ Rxg7 29.Re8+ wins.

B.1.b) 25... Rg7 26.Qe6+ Kh8 27.Nf7+ Kg8 28.Nh6+ Kh8 29.Qg8#.

B.1.c) 25... c3 26.Qe6+ Kh8 (26... Kg7 27.Qxd7+ Kh6 28.Qxh7+ Kxg5 29.Qh4+ Kf5 30.Qf4#) 27.Qxd7 Bg7 28.Bxc3 Rxc3 (28... Bxc3 29.Qxh7#; 28... Rg8 29.Bxg7+ as in B.1.a) 29.Re8+ and mate in two.

B.2) 24... f5 25.Qd4 wins.

B.3) 24... fxg5 25.Qf7#.

B.4) 24... Bh3 25.Nxh3 Rxd7 26.Qxf6

B.4.a) 26... Bg7 27.Qe6+

B.4.a.i) 27... Rf7 28.Ng5 Rcf8 29.Nxf7

B.4.a.i.1) 29... Rxf7 30.Bxg7 Kxg7 31.Qxc4 wins a pawn.

B.4.a.i.2) 29... c3 30.Nh6+ Kh8 31.Qg8+ Rxg8 32.Nf7#.

B.4.a.i.3) 29... Bxb2 30.Ng5+ Kh8 (30... Kg7 31.Qe7+ Kh6 32.Qxh7+ Kg5 33.Qh4+ Kf5 34.Qf4#) 31.Qxc4 wins a pawn.

B.4.a.ii) 27... Kh8 28.Qxd7 Bxb2 29.Re7 Rf8 30.Rxh7+ Kg8 31.Ng5 looks winning due to the double threat Qe6+ and Rh8+ followed by mate in both cases.

B.4.b) 26... Rg7 27.Qe6+ Kh8 28.Bxg7+ followed by bxc4 wins a pawn at least.

B.4.c) 26... c3 27.Bxc3 wins a pawn at least (27... B(R)g7 28.Qe6+ as above).

C) 23... Rc5 24.Rxd5

C.1) 24... fxg5 25.Qd4 wins.

C.2) 24... Rxd5 25.cxd4 fxg5 26.Qe4 Rcc5 (26... Ne5 27.Bxe5 wins decisive material) 27.Qxd5+ Rxd5 28.Qxd5+ Qxd5 29.cxd5 + - [R vs n].

Premium Chessgames Member
  OhioChessFan: I don't say this very often, but this was a rather easy Sunday. I concede I wasn't as thorough as <agb> but that's the advantage of knowing it's a puzzle move.
Premium Chessgames Member
  chrisowen: I dunes keyin dints keyus inate keyin keynub keats ng5as gameas keats rc5as cranks keats to it giv 23...Bxg2 cradle keats gares dines 3 4 it ok oinks keyin rd5as daresy dines keats to it eves 24.Ne4 keyin iffys enter keyus 1 2 it ok oinks keyin bound rd5as dabble keats pc4as cares dines pg5as gamesy keats keyin qg4as games rf5as faceas keatsas ba8as ashenface keatsas ra8as alligator keats qe4as ebber keatsas rd8as danglehad keats to it bivvylag 28...Rb8 dabble oinks aileron bandhates keyin 3 4 it ok oinks keyin qd4as daddy keatas kf7as fengshui keats to it finishoff 29...Rf6 dracula keats fanfare 4 it ok oinks keyin loins 30.g4 attune keats gates keyon 10 11 keats keyin loins 30.c5 about court keyin cinchy diffy creaks keens 6 7 keats keyin dabble wasabi pants marquis mends nagas gacks dinks gorki hares keyin dines hairs ganks faces fleck cleft clues jovial its roofs kestrel query hotus keyin wudas vines frisk its though kinds kestrel kinks firth quoys inous keynub wunda finsy kinsy duffs honks qiusy wryas tvins yinus funds keynub dints whyas offas drown keyon kinks huffs ng5as gameas keyin dabble wobble bapas pants quite keens keyin marquis mends dangs nasal gangs gacks dinks gorki order horns keyin ratchet hares hairs inous keynub ganks faces effect clues jovial its roofs kestrel keyon query hotus keyin wudas vines frisk keyin keyon kinks keats to it giv 23.Ng5 Rc5 cradle keats creaks keens banes bates bares keyes barns beens bases geeas gaggle gallas yinas gameas gantry garage keyas gatesy keyin hegemony ganache hangs kinks keyus hagen haggle keygas gangs geeas gestate heyin eager keats to it giv 23...Bxg2 cradle keats gares dines 3 4 it ok oinks keyin keats to it dive 24.Rxd5 iffys dangas keats to it eves 24.Ne4 keyin iffys enter keyin 1 2 it ok oinks keyin keats to it dive 24...Rxd5 25.bxc4 fxg5 26.Qg4 Rf5 27.Bxa8 Rxa8 28.Qe4 Rd8 dabble oinks aileron darthheld keythen keats to it bivvylag 28...Rb8 dabble oinks aileron bandhates keyin 3 4 it ok oinks keyin keats to it divelands 29.Qd4 Kf7 decks einas keatas fengshui keats to it finishoff 29...Rf6 dracula keats fanfare 4 it ok oinks keyin loins 30.g4 attune keats games keyon 10 11 keats keyin loins 30.c5 attune keats cinchy diffy creaks keens 6 7; keats keyin
dabas break keens racks dinks;

cranks keats danks debby dabby darts badas darks wrack keats beaks radar endas lests hangs keyus keyin lanes wades plans mends refer wallows ranus ageas badda babel break keens palms remember batas drank keats bands keyin pandas reams geeas barrage radical yinus dynamo bakes affable reray ramps gassy grass keats gates keyin fades glass gares rages keyes cradle keats decadent decks addas doits ok keyin affable iotar doits ok keyin dabble ng5am gamble;

Premium Chessgames Member We stuck the computer on this one for 6 hours last night, knowing well there would be a difference of opinion: analysis of move 23.?

Ironically, SF would award a question-mark (or at least a “better is...”) to 23.Ng5, ranking it as only the third best option in a winning position.

We believe that Bronstein, one of the original John Henrys of the man-vs-machine era, would have had it no other way.

Jul-22-18  Howard: This was one of three strong tourmanents that Geller won in 1975-76, when he was getting a "second wind" despite turning 50 during that time.

The big one that he won during this time was undoubtedly Moscow 1975--exceptionally tough event!

Jul-22-18  landshark: Next day guess-the-move I chose 24.Qd4 instead of the game continuation Rxd5. So much for my Sunday fun! I wonder how much weaker my move was...
Jul-22-18  landshark: One of the nice things about 24.Qd4 is it prevents any hanky-panky with ....c3 because 25.Bxc3 Rxc3 loses to 26.Bxd5+. Maybe 24....Bc6 25.Bh3 could follow with pressure -
Premium Chessgames Member
  ray keene: The analyses using modern engines are fascinating and show the amazing resources concealed in the position. I guess Bronstein played instinctively to a great extent ....the concrete variations found more recently were not even thought of at the time.
Jul-22-18  Cheapo by the Dozen: Wow. I correctly guessed that the answer would involve a discovered attack against d5 with the hope of pivoting to an attack along the a2-g8 diagonal. But I didn't come close to seeing the actual game-winning ideas.
Jul-23-18  stst: White is a pawn down, to open up and break in, the f6 pawn is target. Noted also the virtual pin of the Black Q-B and White B, after the N darts out.... so try this line: 23.BxP NxB
24.QxN Rf7
25.QxR+ (Q-sac to gain control) KxQ
26.Ng5+ ....
Then variations ...

.... will see....

Jul-24-18  Honey Blend: I couldn't imagine a human player would dare go for 25. ... ♕xd5!, but SF somehow picked it to avoid all the mating tricks: 25. ... ♕xd5 26. ♗e6+ ♕xe6 27. ♖xe6 ♖d3 (I am not 100% sure about ♖d3 but I feel this is to prevent ♕d4) and evaluates it only at a little above +2, which should give White a slight edge in this complicated-looking ♕ vs ♖♗ position, but nothing tangible at the moment. Black has eliminated White's dangerous Bishop pair. White has no direct attack nor passed pawns, and the ♗f8 defends the dark squares well. The center files are open with Black's rooks having some control; it looks like Black can hold the game quite a bit with fair chances of counterplay.

click for larger view

I wonder if during that time, Bronstein saw 23. ♗h3 and the 25. ... ♕xd5! line above, and avoided it altogether because of that!

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