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Viktor Kupreichik vs Mikhail Tal
"Viktor Calculus" (game of the day Aug-04-2015)
Sochi (1970), rd 9
Sicilian Defense: Classical. Anti-Fischer-Sozin Variation (B57)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 43 times; par: 28 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
May-28-17  Walter Glattke: 25.f5 is the only way to win, all other tries would be parried. 25.f5 Nh4 26.Rxg6+ fxg6 27.fxg6 cxd4 28.gxh7+ Kf7 wins
May-28-17  Walter Glattke: RKnight, one move put wrong, after 25.f5 cxd4 26.fxg6 Rxc2 is 27.gxf7++ Kh8 28.Qxf8+ Ng8 4 possible mates.
May-28-17  RKnight: [Corrected posting] Tal may have had a good way out of trouble: 25...Rc7, 26 fxg6 fxg6, 27 Bxg6 hxg6, 28 Rxg6+ Rg7 and black stands better. Is there a crushing line for white in this variation?
May-28-17  devere: <RKnight: [Corrected posting] Tal may have had a good way out of trouble: 25...Rc7, 26 fxg6 fxg6, 27 Bxg6 hxg6, 28 Rxg6+ Rg7 and black stands better. Is there a crushing line for white in this variation?>

On 25.f5 Rc7 26.Bxc5 Be7 27.Bd4 Bd8 28.Ree3 bxa3 29.Bc5 Be7 30.fxg6 fxg6 31.Rxg6+ leads to checkmate.


click for larger view

This is a real Sunday problem.

May-28-17  Walter Glattke: Not enough: 25.f5 Rc7 26.Bxf6 Bxf6 27.Rh3 Rd8 28.Qxh7+ Kf8 Better seems 26.Bxc5 Be7 27.fxg6 fxg6
28.Bxg6
May-28-17  NBZ: Got side-tracked by 25. Bxf6 Bxf6 26. Rh3 but then 26. ... Bd4+ Kf1 27. Bxg2+ wins for Black. Then I thought White has to start off with 25. Bxa6 to divert the queen, with the idea of 25. ... Qxa6 26. Bxf6 Bxf6(?) 27. Rh3. But first of all, Black can play instead 26. ... Qxf6 27. Rh3 Qg7, and secondly even in the 26. ...Bxf6 line, after 27. Rh3 Rfd8 28. Qxh7+ Kf8 White has nothing decisive.

It was the second thought that led me to give up on making Bxf6 work, because even in the best case scenario White "only" wins the h7 pawn and Black ends up with a bunch of extra pieces, a safe-ish king and a raging counter-attack.

Then I went back to my original idea of playing Bxg6, and realized that all White needs to make it work is one more piece attacking g6. After that it became obvious 25. f5! is the only move here: nothing else advances the attack, and White is a piece down so a move like Be5 is basically equivalent to resigning.

May-28-17
Premium Chessgames Member
  agb2002: I know this game.
May-28-17
Premium Chessgames Member
  lost in space: Have not found the complete line, but it was clear that the key moves were 25. f5 and 26. fxg6 27. Bxg6
May-28-17
Premium Chessgames Member
  Richard Taylor: I saw this game a couple of days ago but I couldn't remember what Kupreichik played! So, with immense courage, I gave up.

These puzzles are good but I recall when I first started on here I spent several hours on the first insane one which happened to be Kasparov's Immortal against Topalov. I found the first 5 or 7 moves and thought I had solved it as I couldn't see a defense...

And that was after some time of studying it. Then Topalov had a move up (or down) the board I hadn't seen. So I saw the rest. Then I went back and tried to visualise the entire combination. But even knowing it it was impossible. It was a good exercise for the cerebum (that's not a bad word by the way diddums Big Pawn, if you are there, it means "brain" or something like that Big Pawn [or his "mates" - they can all ask their mummies for permision to ask about "cerebum" and God etc] if he has any as I have him switched off], so don't worry YOUR little head about that Big Porn);...but while it was a good work out it took me three days and I still failed to see all the moves...

Gustaffson the top German GM said he doesn't do any tactical or other training. Mind you he is kind of semi-retired I think...I think those easier to medium tactics are more useful.

These insane ones are more like playing a real game...

I think in a real game I might find the moves here as the adrenaline etc carries one forward. Sometimes moves such as 15. f5 are played more intuitively so to speak, with a dash of calculations thrown in. It depends also on how much time a player has...

The one for Big Pawn and Trump etc will be tomorrow.

May-28-17  The Kings Domain: Sometimes the answer comes in the simplest of ways :-). Fine puzzle and good game, Tal was handed a defeat in the same way he usually inflicted on others.
May-28-17  Iwer Sonsch: 25.f5, threatening 26.fxg6, should be successful... No idea what I'm missing.
May-28-17  Iwer Sonsch: Too easy.
May-28-17  Ariogermano: Good game
May-28-17
Premium Chessgames Member
  RandomVisitor: After 25.f5


click for larger view

Komodo-10.1-64bit: <11 hours computer time>

<+3.88/49 25...Rc7 26.Bxc5> Re7 27.Ree3 Bb6 28.fxg6 fxg6 29.Bxg6 Rg7 30.Bxh7+ Nxh7 31.Bxb6 Rf6 32.Rxg7+ Qxg7 33.Qxg7+ Kxg7 34.Bd4 b3 35.cxb3 Kg6 36.Bxf6 Nxf6 37.h3 Kg5 38.b4 Be4 39.Re1 Kf4 40.Rf1+ Ke5 41.g4 Bd3 42.Rf2 Be4 43.Kh2 Bb1 44.Rf1 Bd3 45.Rd1 Bb5 46.Rd8 Ne4 47.Rf8 Nf6 48.Kg3 Ne4+ 49.Kf3 Nd6 50.Kg2 Bc6+ 51.Kh2 Bd7 52.Rf2 Be6 53.Rf3 Bd7 54.Rf8 Be6 55.Kg3 Ne4+ 56.Kf3 Ng5+

May-28-17
Premium Chessgames Member
  patzer2: It's not often you see a Tal game where he blows a won position and goes on to lose. However, that's exactly what happens in this game.

Before the Sunday (25. ?) puzzle, Tal falters with <23...Nc5?> (-0.58 @ 26 depth, Stockfish 8) and misses the win with the much stronger 23...Bb6 (-5.92 @ 26 depth, Stockfish 8.)

After the Sunday puzzle solution <25. f5!>, Tal plays 25...cxd4 which allows White a slightly difficult win after 26. fxg6 (+5.16 @ 23 depth, Stockfish 8.)

After 25. f5!, Tal could have put up more resistance with 25...Rc7!? when white might have had a bit more difficulty finding the clever winning move 26. Bc5! (diagram below):


click for larger view

Here the not-so-obvious error 26...Rxc5? loses to 27.fxg6 fxg6 28.Bxg6 (+12.47 @ 35 depth, Stockfish 8,) after which play might continue 28...Kh8 29.Qxf8+ Bg8 30.Qxd8 hxg6 31.Qxf6+ Qg7 32.Qd6 Rf5 33.Rh3+ Rh5 34.Re7 Bf7 35.Rf3 Rf5 36.Rxf5 gxf5 37.Qd8+ Kh7 38.Rd7 f4 39.Qh4+ Kg6 40.Qg4+ Kh7 41.Qf5+ Bg6 42.Qh3+ Kg8 43.Rd8+ Kf7 44.Qd7+ Kf6 45.Qd4+ Ke7 46.Rd7+ Ke6 47.Qxg7 f3 48.Qe7+ Kf5 49.Rd5+ Kf4 50.Qe5+ Kg4 51.Qg5#.

I did not find it difficult finding the rather obvious Sunday puzzle solution <25. f5!,> and I was able to successfully play guess the move for the next four moves <25...cxd4 26. fxg6 fxg6 27. Bxg6 Kh8 28. Qxf8+ Ng8> (diagram below)


click for larger view

Here the best move is White's strong follow-up 29. Bf5! (+6.53 @ 332 depth, Stockfish 8,) preparing 29...Rb8 30. Re8! .

My less than best follow-up was the immediate 29. Re8?! which allows Black survival chances after 29...d3! 30. Bxd3 Bb6+ 31. Kh1 Rxe8 32. Qxe8 Bc7 33. Rg4 to (+0.93 @ 33 depth, Stockfish 8.)

P.S.: See <Random Visitor>'s deep Komodo 10.1 analysis above for best play possibilities after 25. f5! Rc7!? 26. Bc5! .

May-28-17
Premium Chessgames Member
  bubuli55: I wonder if 29...Bb6 is any better.

No!

:)

May-28-17  mel gibson: The computer is seeing the same first move:

25. f5 (25. f5
(f4-f5 ♖c8-c7 ♗d4xc5 ♗d8-e7 ♗c5-d4 ♗e7-d8 ♖e1-e3 b4xa3 ♗d4-c5 ♖c7xc5 f5xg6 f7xg6 ♗d3xg6 ♔g8-h8 ♕h6xf8+ ♗d5-g8 ♕f8xd8 ♕b7-g7 ♗g6-d3 ♖c5-d5 ♕d8xd5 ♘f6xd5 ♖g3xg7 ♘d5xe3 ♖g7xg8+ ♔h8xg8 b2xa3 a6-a5 ♔g1-f2 ♘e3-g4+ ♔f2-g3) +3.04/17 164)

score for white +3.04 depth 17

May-28-17
Premium Chessgames Member
  RandomVisitor: If Tal had played 24...Rxc5! 25.f5 (25.Bxc5 dxc5 26.f5 Be4) 25...Rc7 and the game is more even with white having almost adequate compensation for the knight.
May-28-17
Premium Chessgames Member
  chrisowen: V jack it was d4 dints have vim wain bang f5s flashy guv i punt luv d4s dints best by clung 25...Rc7 cage us clanghug gas glass brash vam blush hang = auld gate taurus bull i vim by g6s guffaws lunks g6s ganghug bunks g6s gablugs h8s harangues lunks of f8s flushhang back bains go g8s ganghunts re vine f5s flashy o b8s bullshine by hanghoods 29...Bh4 duck egg haunt 4 hood auld gate taurus bull i vim cor e8s evermores bug fag f7s flungash bud u 31.Rh3 lad hack wins que h7 harangue won vam us vow vim jack it was d4 dints luv what gremlin grecian urn me vow vim cast whiff hibiscus flow blush bloat long on pad ive nap pan pin day paddy cuz its thin dog we vint its dither won eg hit down won get dints vis widen got hood wide thong dong vims white god whiten don vent weight over f5s flashy v jack it was d4 dints luv wains jug gotcha cruel crem du menthe lemonade ms gremlins eves cast task tow whiff hive hub blush bloat long on pad ive nap pan pin day paddy cuz its thin dog we vints over vis by flush 25.f5 cxd4 cog ever bud dints von guv job jock vent jod hod jog vim by joffy join vim jonty joop ok von guv jostle jot down joust jovial jowls lunk f5s fausts flabus flashy flushy flacks coat effect vide effort even vim d4s dints offer eve fluff ever i feel like tonight levels c7s clanghug vide chuck infer by chuck 25...Rc7 cage us clanghug gas glass brash vam blush hang = auld gate taurus bull i vim by of guffaw 26.fxg6 fxg6 27.Bxg6 Kh8 28.Qxf8+ jovial by flushhung over by ghostarm 28...Ng8 29.Bf5 Rb8 duck egg bullshine off best by hoodhungs 29...Bh4 duck eggs haunt 4 auld gate taurus bull i vim cor 30.Re8 Qf7 31.Rh3 lad hack wins que h7 harangue won vam us vow mint as ever over mat mut mack tack tuck low vam vehement kid ill buy lemonade copt vint could rummage want vint baubels reign wads for best band ukelele e8s evermores kind pad back tail cad big f7 friendly cor u 31.Rh3 lad hack wins que h7 harangue won vam us vow and gas glass guavas ha pet brash vam blush hang hug hung hub hood brash vam baby blush cab cub club crab vant hubby lorica helm etc vim date publish end pa blue hats ums time boil vide ie bib lesson blotch thoughts ums ie aka vide face coccyx i vim by c7 clanghug draw u c vast aid v jack it was d4 dints lunk! f5s firsts!
May-28-17  Walter Glattke: 15.-b4!? 16.e5 dxe5 17.Ne4 maybe better than knight victim 16.Nd5
May-28-17
Premium Chessgames Member
  morfishine: I saw this one already, nice game

*****

May-28-17
Premium Chessgames Member
  DarthStapler: I got the first 3 moves
May-28-17
Premium Chessgames Member
  ChessHigherCat: I got the first 7 moves but I was thinking of the wrong game so the results left something to be desired.
May-28-17
Premium Chessgames Member
  patzer2: At http://en.chessbase.com/post/yermol... is a recent Chessbase article with an analysis of this game which includes commentary from the players.

The article is part of a eulogy playing homage to the game winner Belarus GM Victor Kupreichik, who passed away earlier this month at the age of 68.

May-31-17  Moszkowski012273: 23...Nc5 is absolutely horrible. 23...Bb6 is completely winning for black.
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