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May2718   ChessHigherCat: <WorstPlayerEver: Totally missed Nc3. Oh well.. still better than seeing Nc3 and don't make it happen :P> Bit of a selfserving argument, wouldn't you say? Keep sucking on those sour grapes! I'd say seeing the first moves is a step in the right direction but you'd have to be nearly a GM to see the whole mindblowing followup. 

May2718
  malt: Seen that 23.Nc3 gives access to a7,
if 23...bc3 24.bc3 opens the b file
23.Nc3 Qe8 (23...Qb6? 24.Nd5+ )24.R:a7
23.Nc3 bc3 24.bc3 Rd8 25.Rfb1 Qe8 26.B:a7 

May2718   stacase: <ChessHigherCat: ...seeing the first moves is a step in the right direction but you'd have to be nearly a GM to see the whole mindblowing followup.> I saw 23.Nc3  not like yesterday's ego trip, but getting the 1st move everyday of the week is a personal first. 

May2718   catlover: This puzzle definitely merits the four stars. 

May2718
  agb2002: White has a bishop, a knight and a pawn for the queen. The rook on a1 xrays a7 and the knight doesn't look well placed. These details suggest 23.Nc3: A) 23... bxc3 24.bxc3 (threatens Rfb1 and cxd4)
A.1) 24... Rd8 25.Rfb1
A.1.a) 25... Qe8 26.Bxa7 (26.b8=Q+ Rxb8 27.Rxa7+ Kd6 28.Ra6+ Kd7 unclear) A.1.a.i) 26... Bd6 27.b8=Q+ Rxb8 28.Rxb8 Qxb8 (28... Qd7 29.Rxh8 +  [2R+B+2P vs q]) 29.Bxb8+ Rxb8 (29... Kxb8 30.Ra8+ Kc7 31.Rxh8) 30.Ra7+ Kd8 31.Bd5 (probably better than Rxf7) with a won endgame. A.1.a.ii) 26... Rb8 27.Bxb8+ wins (27... Kxb8 28.Ra8+; 27... Qxb8 28.Ra8; 27... Kd7 28.Bxe5 Qxe5 29.b8=Q). A.1.b) 25... Qd7 26.b8=Q+ Rxb8 27.Ra7+ wins decisive material due to the intermediate checks. A.1.c) 25... Qxb1+ 26.Rxb1
A.1.c.i) 26... a5 27.Bb6+ followed by 28.Bxd8 wins decisive material. A.1.c.ii) 26... Bd6 27.Bxa7 recovers the exchange and ends up two pawns ahead. A.2) 24... Bc5 25.cxd4
A.2.a) 25... exd4 26.Bf4+ Bd6 27.Bxd6+ Kxd6 28.Rxa7 followed by Ra8 sems to win material but Black has two connected passed pawns. A.2.b) 25... Bb6 26.dxe5 Bxe3 27.fxe3, unclear.
B) 23... Qd7 24.Bxd4
B.1) 24... Qxd4 25.Nb5+ wins.
B.2) 24... bxc3 25.Bxe5 Bd6 26.Bxc3 Bc5 27.Be5+ Bd6 28.Rxa7 +  [R+B+4P] (28... Bxe5 29.b8=Q+ Kxb8 30.Rxd7). B.3) 24... exd4 25.Rxa7 (25.Nd5+ looks unnecessarily complex) B.3.a) 25... bxc3 26.b8=Q+ Kxb8 27.Rxd7 cxb2 28.Rxd4 +  [R+P]. B.3.b) 25... Bd6 26.b8=Q+ Kxb8 27.Ra8+ Kc7 28.Nd5+ followed by Rxh8 wins decisive material. C) 23... Qe8 24.Bxd4 looks similar to B. 

May2718   ChessHigherCat: stacase: <ChessHigherCat: ...seeing the first moves is a step in the right direction but you'd have to be nearly a GM to see the whole mindblowing followup.> <I saw 23.Nc3  not like yesterday's ego trip, but getting the 1st move everyday of the week is a personal first.> That's true. I wasted 10 minutes trying to make 23. Nb6 work (if axb 24. Ra8 wins and if 23...Kxb6 then b8=Q. Unfortunately, if 23. Qxb6 white has nyattinkk. Then I almost gave up when I thought, well let's try the knight move on the other side and saw that it set a whole Rube Goldberg mechanism in motion :D
https://commons.wikimedia.org/wiki/... 

May2718
  malt: Missed 23...Qc5 from my previous post
24.R:a7 bc3 (24...Q:a7 25.Nb5+ )
25.Ra8 Qb5 26 Rc8+ 

May2718   landshark: I thought 25...exd4 26. Bf4+ Bd6 27. Bxd6+ Kxd6 28. Rxa7 Qh5 looked dicey. So I threw up my hands and looked. Turns out I was on the right track but no point on this one. Two 5/7 weeks  got all the work days right but zero for the weekends  

May2718   Walter Glattke: From agb2002: A2a) I think for 28.Kc7 29.Ra8 Rb8 30.Rfa1 and the black pawns win against the rook with 30.Rxb7 31.Bxb7 Qxb7 32.R1a7 c3 33.Rxb7+ Kxb7 34.Ra1 d3
and Rb1+ Ka6 Ra1+ Kb5 only good for black. / 30.c3? 31.Rxb8 Kxb8 32.Ra8+ Kc7 33.b8Q+ Qxb8 34.Rxb8 c2! / 33.Rc8+ Kd7 34.b8Q Qxb8 35.Rxb8 c2! 36.Bh3+ Kc6 37.Rc8+ Kb5 38.Bf5 or 33.Kd6  the rook party wins against the pawns then. 

May2718   Walter Glattke: Oh, not 34.d3, 34.c2!, while 34.d3? 35.Kf1! wins for White. 

May2718   messachess: Difficult. Gata found it all back in the days of his run for the wc. 

May2718
  Breunor: Didn't even know where to start! Great game. 

May2718   cormier: click for larger viewAnalysis by Houdini 4: d 28 dpa done
1. = / + (0.36): 21...Kb8 22.Be3 e5 23.Rfe1 Bc5 24.Rec1 Rhd8 25.Bf1 Bf8 26.Bxd4 Rxd4 27.Rxc4 Rxc4 28.b3 Qxb7 29.Bxc4 Qf3 30.Bxf7 Qxf6 31.Bc4 Qf3 32.Re1 e4 33.Re3 Qf5 34.Re2 Bh6 35.h4 Kc7 36.Nb2 Kd6 37.Nd1 a5 38.Nb2 Kc6 39.Rc2 Kd7 40.Re2 Qf3 41.Nd1 a4 42.bxa4 b3 43.Ne3 Kc7 2. + / = (0.62): 21...Kc7 22.Be3 e5 23.Nc3 bxc3 24.bxc3 Bc5 25.cxd4 Bxd4 26.Rfb1 Qc5 27.Ra6 c3 28.Rc6+ Qxc6 29.Bxc6 c2 30.Rc1 Kxc6 31.Rxc2+ Kxb7 32.Bd2 Ra8 33.Ba5 Ka6 34.Ra2 Kb5 35.h4 e4 36.Kf1 Bxf6 37.Ke2 Bd4 38.f3 exf3+ 39.Kxf3 Rh8 40.Be1 Bb6 41.Re2 f6 42.Bc3 Rh6 43.Re1 a5 44.Rb1+ Kc6 45.Rc1 Kd5 46.Ra1 f5 47.Bxa5 

May2718   BxChess: <Walter Glattke> Your arguments for 28...Bxe3 neglect the idea that 29. Rc6+ eventually pulls the Black king from the defence of the b8 queening square, and so in the end black will lose the h8 rook for the b7 pawn. This is presumably one of the reasons that 28...Rb8 was played. 

May2718   njchess: I got the game line up to 26. ♖fb1 which was the point of the knight sac. I'm not sure if White is winning, but I do value the position as ±. 

May2818
  Richard Taylor: <mel gibson: Richard <Intuition also plays a part>
It's got to.
A human can't look at 1 trillion nodes every 10 minutes like an
i7 Quad core using Stockfish 9.>
True. Some players don't think there is. Some have an idea GMs etc calculate everything or something like that. Of course here Kamsky would have seen a lot... I make sacs OTB and on the Internet and they are what I call 'speculators' so I kind of calculate and judge ("intuition" however that is defined). Obviously I lose a lot of games missing good defenses etc but sometimes such a sac can open things up and win a game.... The Najdorf is similarly complex. And of course the first move here was theory. But you have to know why the move is play and how to get there... 

May3018   patzer2: Just now getting around to attempting to deeply analyze this game from the Sunday May 27, 2018 puzzle (23. ?). One resource that appears to be particularly helpful in getting started is he Kingcrusher video analysis of it at https://www.youtube.com/watch?v=kb1.... 

May2019   Howard: This might have been stated earlier, but I'm too lazy to wade through all the previous postings. 23.Nc3 was first played by Salov in an earlier game. Byrne mentions that in his NYT column back from 1994 when he analyzed this game. The analysis of that move by agb2002 from the May 27, 2018 posting looks interesting. 

May2019   Howard: According to Stockfish, 21...Kb8 would have held the postion. 

Apr2820   Chesgambit: kc7?? 

Apr2820   Chesgambit: 27... c3 Rc6 Qxc6 Bxc6 c2 Rc1 Kxc6 Rxc2+ Kxb7 32. Ra2! maybe Vladmir Kramnik miss this 

Apr2820   Chesgambit: also Kg2 works Bxe3 fxe3
this endgame si winning g4 kg3 g5 kg4 g6
kg5 kxg6
example
33...a5
analysis of move 33...?3...a5 34.g4 Kb6 35.Kg3 a4 36.g5 Kb5 37.Rc7 Rf8 38.Ra7 Kb4 39.h4 a3 40.Kg4 Kb3 41.g6 fxg6 42.Kg5 a2 43.Kxg6 Rg8+ 44.Kh7 Rg3 45.f7 Rf3 46.Kg7 Rg3+ 47.Kh6 Rf3 48.Kg6 Rg3+ 49.Kf5 Rxe3 50.h5 Rf3+ 51.Ke4 

Apr2820   Chesgambit: 27...c3 28. Rc6+ Qxc6 29. Bxc6 c2 30. Rc1 Kxc6 31. Rxc2+ Kxb7 32. Kg2 Bxe3 33. fxe3 a5 34. g4 a4 35. g5 a3 36. Kg3 Ra8 37. Ra2 Kb6 38. Kg4 Kb5 39. g6 fxg6 40. Kg5 Kb4 41. Kxg6 Kb3 42. Rxa3+ Kxa3 43. f7 

Apr2820   Chesgambit: Kb4 Kg7 Kc3 f8=Q Rxf8 Kxf8 Kd3 h4 Kxe3 h5 e4 h6 Kd2 h7 e3 h8=Q e2
theory wins insane calculations
also not Rxa3 Ra1 easy wins 

Oct2420
  scutigera: <Some have an idea GMs etc calculate everything or something like that.>
Andy Soltis claims (yeah, yeah, he claims a lot of things) that he once convinced some people he was drinking with that new FAA regulations forbade GMs to calculate more than six moves ahead, as it interfered with lowfrequency radio transmissions. 



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