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Akshat Chandra vs Wesley So
US Chess Championship (2016), St Louis, MO USA, rd 2, Apr-15
Caro-Kann Defense: Advance. Tal Variation (B12)  ·  0-1


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sac: 23...Rxg5+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Premium Chessgames Member
  Sally Simpson: Hi Cro777,

" (and not to rush as he [Wes] did in this game)."

You either learn from experience and Wes should know playing against someone in TT with one eye on the clock and the other on the board is asking for trouble.

Or you learn from a game. In a couple of games in the

Karpov - Korchnoi World Championship Match (1978)

Karpov blew good positions and got into bother trying to take advantage of Korchnoi's TT.

(game 10 - more famous because of that Knight sac in the Open Lopez. Karpov's rushed 33rd. move nearly lost him the game. The game was drawn.)

Then I was chess hungry devouring everything and these incidents made a lasting impression.

We all have these 'Ah-Ha' impressionable moments of in our past when we studied. Some you never forget.

Hi Perfidious,

I'm now at the age of instantly recognising the face. It's strange gift we have that one. even though we might have met for only a minute or two.

It's the names. I forget their name!.

Premium Chessgames Member
  perfidious: <Geoff> I am actually far better at recognising and recalling names, even as I approach my dotage.

How will things be, ten years on? Good question.

Premium Chessgames Member
  Sally Simpson: Hi Perfidious,

I spoke to a lad last week at the Edinburgh congress. I can remember years ago I played 3.Qf3 v his Caro Kann and won.

1.e4 6 2.N3 d5 3.Qf3

click for larger view

I could not remember his name.

We stood there chatting and I'm thinking "Who are you?"

In my defence I do know and have met 100's and 100's of chess players. I'd be more worried if I recalled the name but forgot I won the game.


A few years back one lad from an away team came up to me in the bar and said:

"You may not remember me but I played in a simultaneous display you gave at our club one night when I was a teenager."

I replied:

"I do remember you. If you had played 17...Nf8 I would not have sacked on h7 and won in 4 more moves."

He was well impressed until the rat Keith Ruxton collapsed laughing telling him I was joking.

Premium Chessgames Member
  Phony Benoni: Amazing how a bishop can make all the difference by just sitting there.
Nov-11-17  Caissas Clown: Ah - ah ! Instinctively,I knew 33.Rxe6 was the right move.But it's hot in Australia today,so I was too lazy to analyse it. If it had been cooler , I may still have failed to work it out fully,due to abject lack of talent.
Premium Chessgames Member
  diagonalley: wow! what a game! ... <diagonalley> claims 0.05 of a point for getting the first two moves :-)
Premium Chessgames Member
  patzer2: Seems to me today's Saturday puzzle (23...?) is more a study in active positional play than it is in computing a winning combination.

In assessing the position, Black is up a couple of pawns. However, his Knight is stuck dangerously in the center between two active Rooks with no easy way to reinforce it. If 23...e5??, then simply 24. Rcxd4 +- wins the piece due to the pin on Black's e5 pawn. If Black dares to try to move the Knight to the only "safe" square with 23...Nf5 then White gets a dangerous attack going with the double attack 24. Rb4 ± (+1.14 @ 35 ply, Stockfish 8) which threatens the Black Queen and the pawn on b7.

So Black's only viable option to saving his game, and keeping the battle going in his favor is to sacrifice the exchange and reinforce his Knight with 23...Rxf5! 24. fxg5 0-0-0 ∓ (-1.14 @ 42 ply, Stockfish 8).

The rest of the game goes more to show that the follow-up in difficult positions like this is not easy, especially in time pressure, even for Super GMs.

Everything goes smoothly for Black for the first five moves of the follow-up. But then Black makes a slight error with 28...Kd8?! which allows White to get back into the game with 29. Kf3 ⩱. Instead, 28...Kb8 ∓ or 28...Be5 ∓ would have kept Black's King safer and put more pressure on White's position.

Things go from bad to worse for Black after 32...Rh1?, giving White a win with 33. Rxe6+! +- (+5.01 @ 28 depth, Stockfish 8).

Fortunately for Black, White missed the win with 33. Rxe6+! and returned the favor with a mistake of his own with 33. Kg4? which allows Black a winning position after 33...Kf8! -+ (-2.01 @ 28 depth, Stockfish 8).

P.S.: If anyone got all of this in a a reasonable amount of time, they must have seen this game before or be calculating at higher than Master level. I wasn't even close to figuring it out, as I went for the much weaker 23...Nf5? 24. Rc4! Rxg5 ± (+1.14 @ 35 ply, Stockfish 8) continuation.

Nov-11-17  Sham64: <SALLY SIMPSON> "It's like trying to explain how you can instantly recognise a face of someone you know the very second they step into view."

Interested by your insight!

I made a film about Susan Polgar for Channel 5 a few years back, called My Brilliant Brain. Susan agreed to do an MRI scanner test, which gave some evidence that chess pattern recognition occurs in the Fusiform Face Area, a brain region which evolved for face recognition. This is an important skill for evolutionary survival (a baby better recognise his or her parents for example) but it seems that chess might be hijacking it.

Premium Chessgames Member
  gofer: <<diagonalley> claims 0.05 of a point for getting the first two moves :-)>

click for larger view

Hmmm, I thought I deserved much more than that! But I didn't expect the knight retreat to be to b3, but to be to a4 instead, so didn't get any further than the first two moves and really should have seen why Na4 is so bad...

click for larger view

-3.02 (25 ply) 1...Qd2 2.Nc3 Qxd1+ 3.Nxd1 Nf3+ 4.Kf1 Nd2+ 5.Ke2 Kc7 6.Ra4 Nxe4 7.Rxe4 Rd4 8.Re3 c5 9.Rf3 Rd7 10.Ra3 a6 11.Ne3 Rd4 12.Nc2 Rf4 13.Rf3 Rxf3 14.Kxf3 c4 15.a3 Kc6

<So 0.01 of a point for me!>

Nov-11-17  Pasker: Whats's going on? Too much for me. GM stuff here.
Premium Chessgames Member
  malt: Got 23...R:g5 24.fg5 Rd8
Premium Chessgames Member
  catlover: Tough puzzle. I almost never get close on Saturday puzzles, but I was more clueless than usual on this one.
Nov-11-17  njchess: It took me about 10 mins to get this one. Although, to be fair, I had 23 ... 0-0-0 followed by 24 ... RxB. I simply couldn't find a move for Black that didn't make his situation worse! The position is a wild one. White has a slight material advantage but his king is exposed and he also has few good moves. 32 ... Rh1 is a blunder which White blunders away to end the game.
Nov-11-17  BOSTER: <cro777> :<I'm mostly interested in the ideas behind various moves>. My guess that is not enough. This is the same like see only one colour in the picture which consist of spectrum. What I want to say that any move should be a part of the plan.
Nov-11-17  devere: <diagonalley: wow! what a game! ...> <diagonalley> <claims 0.05 of a point for getting the first two moves :-)>>

If you got the first two moves you did exactly as well as Wesley So, so you score 100%.

Nov-11-17  drollere: This one was easier than yesterday. The bishop had to go to open the Q file, and f6 to block wrecked the K side pawn barrier.
Premium Chessgames Member
  malt: Psst <njchess> move 23...
Premium Chessgames Member
  chrisowen: Think g5s guilds vis tone vets g5s guttin to it five 24 000 def cull vis focus to it vibe 24Rd8 cuff ohm dinkhunts 1 build viva vim b3s buck bun to it avids 25.a4 job aider vis 1 build vim b3s buck lug b3s bint vis hub a1s act g2s gum d1s dub c2s cub d8s dinkhunts cask aka ankles hands abracadabra vams to it civvyhug 28...Kc7 duboff clungins 1 vim build vide off f3s funs guv nubs e8s evermores to it hivehungs 29Rh1 ebb his 1 build vim b4s bunks c1s cus cor 30Rd7 deo meo dunkhung 0 1 its low eve luv von guvs lip vim e2s ebb its i 31.Qa4 lady avids vis level build vim bung b5s buntus lug b3s bint vis its to 32.Rxe6+ lap hive effigys vis 1 build vim vet its to 32Rh1 egg finish did his vim e6s effigys wins tink b5s bungus level builds vim oft its to 32...Bc3 did hog coccyx i vim have i viva 1 build vim vis tink g4s guild win f8s flushhind culls him win think g5s guilds hmm pov mew zaps gank das boy dob bod nice jeckyll hyde vis ruffle que fury its wale boy hut vis its bale win hot yikes lewd vis bay hot vis oblate why beltway hos byelaw tho wealth boy vide g5s gutins von guv vis think hup pov pivot vim mew whisk zaps gank gad dang gas dab dob bod gab boy nice vim yin yang vis jeckyll hyde ice jelly ruler quoff ruffle que fury its wale boy hut vis wins to it hiv 23Rxg5+ daddy guilds cud dick duck crud g5s grubin uvs gypsys gutins gumbin vide guffin feel good like flung fig gift guff gist grumps uvs hugs gulch hungs hogs ebbs to it give 24.fxg5 000 cull focus to it vibe 24Rd8 cuff ohm dinkhunts 1 build viva vims to it bivow 25.Nb3 job buck bun to it avids 25.a4 job aider vis 1 build vims to it bivow 25Nxb3 26.Qxb3 Qa1+ cio amps to it givehug 27.Kg2 Rd1 28.Qc2 Kd8 dob hound dinkhunts vis cask aka ankles hands abracadabra vams to it civvyhug 28Kc7 duboff clungins 1 vim build vides to it finisharc 29.Kf3 Ke8 duck egg erstwhile vis to it hivehungs 29Rh1 ebb his 1 build vim cus cor 30.Rb4 Rc1 deo meo cup cus cor 30Rd7 deo meo dunkhung 0 1 its low eve luv i von guvs lip vim its a 31.Qe2 lid ebb vis avis ebb its i 31.Qa4 lady avids vis level build vims its a 31b5 32.Rb3 avid bah buck born its to 32.Rxe6+ lap hive effigys vis 1 build vim vet its to 32Rh1 egg finish did his vim e6s effigys wins tink b5s bungus level builds vim oft its to 32...Bc3 did hog coccyx i vim have i viva 1 build vim vis tink g4s guild win f8s flushhind culls him win think g5s guilds hmm caws whicker wicks wcs claws wus cus air famine winch eyeslip vow formative link b5s builds clump clamp dates cask aka ankles hands abracadabra vam viva flav chang bunt built bint but tubby bit low eve luv von guv hud dutch huff hid ive vow diff duff vis club crib vim dutch hud bid dib dick duck huck hick hibiscus ums focus did hive cud think g5s guilds;
Nov-11-17  drollere: <The links between perception and expertise have been demonstrated many times.>

This was a little demonstration of memory in cognitive psychology around the 1980’s. The idea then was that memory is constructive, and better players “chunk” the position into memorable units.

I am a miserable player, but it doesn’t seem to me that good players see configurations so much as the whole board, dynamically. In Rubik’s cube for example the nine squares immediately present a pattern as colors, and the patterns define which twists or turns will produce a certain kind of change. The moves are the patterns.

It’s possibly significant that both chess and RC can be played rapidly by experts, to the point where there isn’t reasonable time for calculation. And when I calculate I often look only at the “working parts” and forget about the pieces with moves that can intercede from across the board.

Premium Chessgames Member
  agb2002: Black has two extra pawns.

White threatens Rcxd4 (aiming at d8) and Nxe6 could be feasible if the black knight moves or is eliminated.

The position of White's royal family suggests 23... Qd2, however this loses to 24.Rcxd4.

Another option is 23... Nf3+ 24.Kg2 Nd2 but is met with 25.Rc2.

The risky position of the black king and White's threats lead to consider 23... Rxg5+ followed by 24... 0-0-0 with compensation for the exchange (the iniciative plus two pawns).

Premium Chessgames Member
  Jimfromprovidence: After reviewing the past posts and with the help of the CG chess engine tool, for me it was worth the time studying the previously stated overlooked winning move 33 Rxe6+!

It begins 33 Rxe6+ fxe6 34 Qe6+ Kf8 35 Rd3, below, threatening mate in one.

click for larger view

There is still plenty of meat left in this line.

Nov-11-17  Milesdei: Aside from playing through the game before attempting to solve a puzzle, is there any way to know whether castling is still permissible?
Nov-11-17  BOSTER: The answer is "NO".
Premium Chessgames Member
  numbersguy70: <patzer2>: Seems to me today's Saturday puzzle (23...?) is more a study in active positional play than it is in computing a winning combination.

Well said. I need to learn not to be annoyed by puzzles that don't have a clear win as a solution.

Dec-02-17  joddon: Wesley So plays so much chess that any credit he gets is nothing but from the amount of chess he that point what others seem like its very hard situation.....he sees it like a small small problem.....he intimidates players a lot, hence like mAGNUS , WILL BE THE BEST CONTENDER TO TAKE AWAY HIS TITLE!!!!!!!!
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