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Bryan Mathews vs Jonathan Subervi
Dresden Olympiad (2008), Dresden GER, rd 6, Nov-19
Spanish Game: Closed Variations. Chigorin Defense (C97)  ·  1-0



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sac: 29.Nxd6 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-07-08  Kwesi: <Ladolcevita> What about 32.f4 threatening Rh1# ?
Dec-07-08  Eyal: <Ladolcevita: I just look back this puzzle,and i think white can survive by taking the rook,this is my line 31.Qxf7+ Kh8 32.Rh1+ Kg5
33.Rh5+ gxh5

Am i missing something??>

Yes - as was already pointed out in previous kibitzing, 33.Qg7! to prepare Rh5+. 33.f4+ exf4 34.e5 is also good enough to win; Black has an ingenious way to keep the game going for a bit longer by 34...f3+ 35.Kf2 Nd3+ 36.Bxd3 Qb6+ 37.Kxf3 Qf2+ 38.Kxf2 Rf8, but after 39.Bxg6 Rxf7+ 40.Bxf7 it's obviously hopeless for him.

Dec-07-08  Ladolcevita: <kewesi>yep....this is really irresistible.... <Eyal>
I think if Qg7,maybe black can trade his two rooks for one rook,still remaining better in material....

There are so many lines upstairs,and i cant check it one by one,anyway...its so hard to be not missing everything!...

Dec-07-08  Eyal: <Ladolcevita: <Eyal> I think if Qg7,maybe black can trade his two rooks for one rook,still remaining better in material.... >

If you mean 33...Rh8, it doesn't help - 34.Rxh8 Rxh8 35.Qxh8, and Black will be mated on h4.

Dec-07-08  Ladolcevita:
....i am so stupid..weeping....
Premium Chessgames Member
  patzer2: For today's difficult Sunday puzzle solution, White plays the deep deflection sham sacrifice 29. Nxd6!! to prepare a decisive attack on Black's weakened castled position after 29...Qxd6 30. Rxh7!

Here's my computer (Fritz) checked breakout:

<29. Nxd6 !! Qxd6>

Relatively better for Black may have been 29... Reb8, when 30. Nxb5 Rxb5 31. Qxc3 leaves White with a solid extra pawn but no clear forced win.

<30. Rxh7! f6>

If 30... Kxh7, then White forces Black into a mating web after 31. Qxf7+ Kh6 32. Rh1+ Kg5 33. Qg7! when play might continue 33...Rh8 34. Rxh8 Rxh8 35. Qxh8 Bf1+ 36. Kg1 Kxg4 37. Bd1+ Be2 38. Bxe2+ Kg5 39. Qh4#.

If 30... Rf8, White forces a transposition back to the game continuation with 31. Rch1 f6 32. R1h6 .

If 30... f5, then White wins with 31. Rch1!, when play might continue 31...Qf6

(31... Nxe4 32. Bxe4 c2 33. Rh8+ Kg7 34. R1h7+ Kf6 35. gxf5 c1=Q 36. fxg6+ Qf4 37. Rf7+ Kg5 38. Qh5#;

31... Nd3 32. Bxd3 Bxd3 33. Qxd3 fxg4 34. f4 exf4 35. gxf4 Qxf4 36. e5 Qf3+ 37. Kg1 Kf8 38. Rh8+ Ke7 39. R1h7+ Kd8 40. Rxe8+ Kxe8 41. Qxg6+ Kf8 42. Rh8+ Ke7 43. Qe6#)

32. exf5 gxf5 33. R1h6 e4 34. Qf4 .

<31. Rch1 Rf8 32. R1h6! Rad8 33. Rxg6+! Kxh7 34. Qf5> 1-0

Black resigns as he cannot prevent a quick Qh5# (e.g. 34...Bf1+ 35. Kg1 any and 36. Qh5#).

Dec-07-08  jinga: nice distraction by mathews. the other moves are easy to see. nice ending of the chess olympiad 2008 theme.
Dec-07-08  njchess: I got this one easily enough. Lure the overworked queen from f7 and then remove the remaining defenders.

< Ladolcevita: I just look back this puzzle,and i think white can survive by taking the rook,this is my line 31.Qxf7+ Kh8 32.Rh1+ Kg5
33.Rh5+ gxh5

Am i missing something??>

If only my king could move so well... 31. ... Kh8 followed by 32. ... Kg5 is not legal.

Dec-07-08  I Like Fish:

29 N:a5
... R:a5
30 b4

Dec-07-08  brazil chess: What's wrong with 30... Kxh7? What else could white do? 31.Rh1+ Kn7, then what? Actually what he played may had cost him the game: f6?? Had Subervi taken the rook he would be fine. White would've exchanged N and R for 2 pawns with no advantage in the position. I dare to say Mathews (white) bluffed and black bought into it.
Premium Chessgames Member
  al wazir: <Eyal>, <patzer2>, <Once>, and others: OK, it isn't totally busted.

BTW, I found 29...Be2 without computer assistance [bows slightly, smirking], though I regret to say [continues in a barely audible voice] only after peeking.

Premium Chessgames Member
  patzer2: <brazil chess> < What's wrong with 30... Kxh7? What else could white do? 31.Rh1+ Kn7, then what?> If 30...Kxh7??, then 31. Qxf7+ Kh6 32. Qg7! has Black in a mating web, despite White being a "piece down." See my previous post for a bit more detail.
Dec-07-08  johnlspouge: < <al wazir> wrote: this puzzle is busted. >

In many sacrifices, the victim is best to refuse, yielding the perpetrator a "mere" P with improved positional considerations. For some strange reason, upon seeing such consequences, I do not experience your apparent disappointment, <al>. Kotov's rule (as paraphrased by <UdayanOwen>): when you are a P up, with all else equal, you can cease calculation.

I think to myself: Mission accomplished... and then move on.

Dec-07-08  johnlspouge: Sunday (Insane):

B Mathews vs J Subervi, 2008 (29.?)

White to play and win.

Material: Down a P. The Black Kg8 has 3 legal moves, all dark squares. White has Rh1 on an open file, with Rc1 ready to reload. The White Qf3 is on a semi-open file, but in <Once>’s happy phrase, Qf3 is a “tall R” hemmed in by the White K-side Ps. The White Nc4 attacks Pd6, tying down Qe7. The Black Bb5 is loose and quite vulnerable after Nxd6. The White Bc2 holds the Q-side, but requires activation. The White Kg2 is secure. To summarize, White has the h-file, which gives him an excellent base for operations, but Black has Q-side counterplay. The “normal course” for the game yields 29.Qxc3 [else, Bxc4 30.bxc4 with a strong Q-side initiative from the passed Pa5]. The h-file indicates the possibility of one of <Gilmoy>’s smiting moves, i.e., checks, captures, and threats.

Candidates (29.): Qxf7+, Rxh7, Nxd6

29.Nxd6 (threatening 30.Nxb5 or 30.Nxe8)

The Qe7 is overburdened and must prevent both Nxd6 and Rxh7, but cannot.

29…Qxd6 [else, face a passed Pd5 and then drop a P without compensation to Qxc3]

30.Rxh7 (threatening 31.Qxf7# and 31.Rch1 32.Rh8+ 33.R1h7#)

The Rh7 is untouchable:

(1) 30…Kxh7 31.Qxf7+ Kh3 [Kh1 32.Rh1#]

32.Rh1+ Kg5

<[Here I experienced chess blindness with 33.Qg7+ forgetting Pg6. Toga gives

33.Qg7 (threatening 34.Rh5+ Kxg4 35.Bd1, etc. winning).]>

(2) 30…Qd7 [or Qc7] 31.Qf6 then 32.Rh8# after reloading with Rc1 if necessary

(3) 30…Qe7 31.Rch1

Black must advance Pf7, so White wins at least Q+2P for R+N, with a huge attack to come.

(4) 30…Rf8 31.Rch1

(4.1) 31…f5 32.gxf5 gxf5

[else, White forces …Kf7 and plays fxg6+, effectively finishing the game]

33.Qh5 and the threat Rh8+ with control of f7 finishes Kg8.

(4.2) 31…f6 32.g5 (threatening 33.gxf6 Qxf6 [if Rxf6, Black is mated] 34.Rh8 35.Rh7+ 36.Qxf6)

The play in this variation centers on control of f7, a critical flight square when White has an h-file battery. If White controls f7, he can win with Rh8+ then Rh7#. Because the Black Rf8 must shelter Kg8 with the escape Kg8-f7-e8, it cannot defend f6, because Rxf6 permits Rh8+ then Rh7#.

32…Nd7 33.R1h6 (threatening 34.Rxg6+ 35.Kxh7 36.Qh5#)

33…f5 34.exf5 (threatening 35.fxg6 36.Rh8+ 37.Rh7#)

34…gxf5 35.Qh5

As in Variation (4.1), the heavy artillery on the h-file will mate Black.

Premium Chessgames Member
  Once: I think it is fair to say that we have found a stronger defence for black than Subervi managed, even if we did have help from the kibitzing, silicon, peeking ...
Dec-07-08  johnlspouge: I did not analyze the defenses 30...f6 or 30...f5. Toga prefers 30...f5, until ply 14, when it switches to 30...Rf8. Truly, an insane position :)
Dec-07-08  johnlspouge: Mathews does not mess around when he has an advantage: see B Mathews vs S Chung, 2008.
Premium Chessgames Member
  patzer2: Bryan Mathews is an expert from Panama, who plays aggressively for the win. The tournament result for Dresden 2008 indicates he played 8 decisive games with four wins and four losses. This win, versus Jonathan Subervi of the Dominican Republican, represents the highest rated player Mathews defeated at the Olympiad.
Dec-07-08  SufferingBruin: Off topic but since I like the folks in these here parts, I thought it would be safe to post this question here: how do you pronounce Alekhine's name? I've heard it said three different ways:

1) Al-ECK-en (youtube interview)
2) Al-uh-KEEN (I grew up hearing this one)
3) Ai-YECK-en (Larry Christiansen)

It's not just me--I'm a teacher and I got a student who's a freak for tactics and wants to study Alekhine's games. Thanks...

Premium Chessgames Member
  al wazir: All Russians pronounce it al-YOKH-een. (The 'e' is really pronounced as an 'o'.)

Vowel sounds in Russian change, depending on whether they occur in a stressed or unstressed syllable. For historical reasons, 'o' in a stressed syllable following a palatalized consonant (one with a little trailing 'y' sound, like the sound following the 't' in the British pronunciation of "tune") is written as 'e'. When Russians want to distinguish this from an ordinary 'e' (which they almost never do, since they already know how it should be pronounced), they put a diaresis -- identical with a German umlaut -- over the one that sounds like 'o'.

Examples: teply, prounounced "TYO-plee" (the masculine form of the word for "warm") and tepla, pronounced "tye-PLAH" (the feminine form) are both written with 'e'. The neuter form of the same word, teplo, pronounced "tye-PLO," is always written with an 'o' after the 'l', not an 'e', because the 'l' isn't palatalized. (To confuse you a little more, the unstressed 'e' is actually pronounced more like an 'i'. Thus, Russians pronounce Chechnya as "chich-NYAH," not "chech-NYAH.")

Dec-07-08  TheBish: After much deliberation (more than I would have in an OTB game, most likely) I came up with 29. Nxd6! Qxd6 30. Rxh7! since 30...Kxh7? fails to 31. Qxf7+ Kh6 32. f4! exf4 33. gxf4, followed by 34. Rh1 mate (unless Black sacks his queen by 33...Qxf4). Best defense seems to be (after 30. Rxh7) Rf8 31. Rch1 f6 32. R1h6! (threatening 33. Rxg6+ Kxh7 34. Qf5 followed by 35. Qh5#). After 32. R1h6 Black should try 32...Bd7, but White is still winning after 33. g5, since the threat of 34. Rxg6+ is renewed (followed by Qh5#), with the only defense being 33...f5 34. exf5. Here, White already has three pawns for the knight, with a killer attack. There is no was to stop f5-f6 followed by Rg7+ or Rxg6+ and Qh5#.
Dec-07-08  GreenArrow: In my opinion this is extremely easy for a Sunday puzzle. Rxh7 is a stock move, just so deflection with Nxd6 isnt hard to spot. I got this more or less instantly and probably others did too. Still a nice win against a decent opponent though.
Dec-07-08  whiteshark: I went for 29.Rxh7, only to learn that 30...Be2 would have spoiled the party.
Premium Chessgames Member
  patzer2: <Sufferingbruin> Listen to the You Tube video at to hear Alekhine's name being pronounced during a news recording interview.
Premium Chessgames Member
  al wazir: <Sufferingbruin>: If you're old enough to remember Nikita Sergeyevich Khrushchev, maybe you also recall that his name is pronounced "khrush-CHOFF." Same deal.
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