AlphaZero on Carlsen-Caruana Games 1-8

AlphaZero on Carlsen-Caruana Games 1-8

1. If Fabiano had played 15.Rxa5! in Game 3 (a move he said he regretted not playing immediately after his 15.Bd2), AlphaZero gave him as high as an 80% expected score (AlphaZero doesn’t work in pawn scores as other engines do). Matthew comments:

 
AlphaZero loves positions in which it feels that it has all the play and the opponent only has to sit and wait for things to happen, because AlphaZero is extremely good at optimising its play.
  2. The 6.b4 “Wing Gambit” in Game 5 is AlphaZero’s second choice after 6.Bxc6. 3. 7.Nd5 in the Sveshnikov gets AlphaZero’s vote of approval. As Matthew comments:
Why is it interesting to talk about that? The point is that AlphaZero is a self-learning machine. It’s taught itself chess within 9 hours and 44 million self-play games and it’s got a very definite view on how to play chess and which positions are good and which are not. So when AlphaZero says, “yes, I like this opening move,” there’s some real basis to it - there’s some real thought, some real practice that’s gone into it.
4. Fabiano’s 23.Rad1 in Game 8 came in for some criticism afterwards, but it's actually AlphaZero’s choice in that position. The computer agrees with everyone else, however, that 24.h3? was a mistake. It evaluated 24.Qh5! as a 93% expected score for the challenger! 5. What does AlphaZero add to analysis?
It’s the way it’s so quick to find clear, concrete plans, and the way those plans are reflected in all of its lines. It’s consistent.

DeepMind co-founder and CEO Demis Hassabis made the opening move in Game 8 of the 2018 World Chess Championship in London | photo: Niki Riga

 

2. The Queen’s Gambit Declined: Games 2 and 7

  Matthew notes that the quieter Queen’s Gambit Declined, as played by Fabiano in these two games, is an opening favoured by AlphaZero, which also approves of the line chosen by Magnus with 5.Bf4 (and not the previously popular 5.Bg5). It suggests White’s expected score if Magnus had dared to reply 11.Nd2 to the surprise 10…Rd8 in Game 2 were 65-70%, though as Matthew cautions, that’s closer to a draw than to a win. He explains that, “AlphaZero was cheering all the way for Fabiano,” and largely approved of his play in both of these games.

3. The English Opening and the Petroff: Games 4 and 6

  In the Reversed Sicilian in Game 4 Matthew notes that 6…Bc5, first introduced at the top-level after some deep computer checking by Alexander Grischuk, is also AlphaZero’s choice, but DeepMind’s creation doesn’t only give the stamp of approval to known moves. Matthew points out that the never-played 9…Nb6 is actually its choice on move 9 rather than Fabi’s 9…Nxc3. It agrees with Garry Kasparov and everyone else that 15.b5! should have been the follow-up after 14.a4 by the World Champion. Later Black was absolutely fine, and Matthew was taken aback by some of AlphaZero’s suggestions:
It’s not a huge calculating machine – it’s calculating a lot less than any of the other engines, but once it finds its path where it wants to go, the energy and the power that it puts into prosecuting that plan is enormous, and you really can hear the wind flowing through your hair (well I can't, but you probably can!) as this enormous rush of attack blows through. It's really, really impressive.
In Game 6 AlphaZero approved of how Fabiano, “understood the dynamic potential of his position” in a quiet Petroff that developed into a thriller. Matthew was impressed by the schematic way AlphaZero would have approached the ending, but did note an Achilles’ heel:
I’m afraid AlphaZero did not see that mate-in-36. To be honest, looking at AlphaZero’s big strengths, and also the fact that it’s not using endgame tablebases but doing it all by itself, it doesn’t surprise me too much, but it’s worth mentioning that this is something that it didn’t actually find.
You can play through all of Matthew's Alpha-Zero powered analysis in the viewer below (you can also download the pgn file): Game 1: Caruana vs. Carlsen, 1/2-1/2 WorldChessCh2018G1.G11.pgn DOWNLOAD
[Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.09"] [Round "1"] [White "Caruana, Fabiano"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "B31"] [WhiteElo "2832"] [BlackElo "2835"] [Annotator "TA"] [PlyCount "229"] [EventDate "2018.11.09"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. h3 Nf6 7. Nc3 Nd7 {B31: Sizilianisch (Rossolimo-Variante)} (7... O-O 8. O-O Ne8 9. Be3 b6 10. e5 f6 11. Re1 Nc7 12. Qd2 fxe5 13. Bh6 Rxf3 14. Bxg7 Kxg7 15. gxf3 Bxh3 16. Rxe5 e6 17. Rg5 {1-0 (33) Caruana,F (2827)-Gelfand,B (2703) Batumi 2018}) (7... b6 8. Be3 e5 9. O-O O-O 10. a3 Qe7 11. Qb1 Nh5 12. b4 f5 13. bxc5 f4 14. Bd2 bxc5 15. Qb3+ Be6 { 0-1 (39) Caruana,F (2820)-Carlsen,M (2862) Wijk aan Zee 2015 CBM 165 [Stohl,I]} ) 8. Be3 e5 9. O-O b6 {LiveBook: 6 Partien} 10. Nh2 Nf8 11. f4 $146 ({ Vorgänger:} 11. Qd2 Ne6 12. Bh6 O-O 13. Bxg7 Kxg7 14. Ne2 Qg5 15. f4 exf4 16. Nxf4 {1-0 (45) Manik,M (2440)-Nayhebaver,M (2005) Kosice 2010}) 11... exf4 12. Rxf4 Be6 13. Rf2 h6 14. Qd2 g5 15. Raf1 Qd6 16. Ng4 O-O-O $1 17. Nf6 Nd7 18. Nh5 Be5 19. g4 f6 20. b3 Bf7 21. Nd1 Nf8 22. Nxf6 Ne6 23. Nh5 (23. Nd7 $5 { [%cal Rd7e5]} Bf4 24. Nf6 $11) 23... Bxh5 (23... Bg6 {is interesting.} 24. Kh1 Qe7 25. Qe2 Rdg8 26. Rg1 Kb8) 24. gxh5 Nf4 25. Bxf4 gxf4 26. Rg2 Rhg8 27. Qe2 Rxg2+ 28. Qxg2 Qe6 $1 29. Nf2 $1 Rg8 $36 {[%mdl 2048] Schwarz hat starke Initiative.} 30. Ng4 Qe8 31. Qf3 Qxh5 32. Kf2 $1 Bc7 33. Ke2 {[#]} (33. e5 $1 $15 Kb7 34. Nf6 Qh4+ 35. Ke2) 33... Qg5 $1 $19 34. Nh2 (34. Qf2 {war nötig.}) 34... h5 35. Rf2 Qg1 36. Nf1 h4 (36... Qg7 $19 37. Nd2 Kb7) 37. Kd2 $2 (37. e5 $1 $15) 37... Kb7 38. c3 Be5 {Droht ...Tg3! und aus.} 39. Kc2 Qg7 (39... b5 $19 {zielt auf ...Tg3! ab.} 40. Qe2 b4 41. cxb4 Bd4) 40. Nh2 $1 $15 Bxc3 41. Qxf4 Bd4 42. Qf7+ Ka6 $1 43. Qxg7 Rxg7 {[%mdl 4096] Endspiel KTL-KTS} ({Doch nicht} 43... Bxg7 $6 44. Rf5 $11) 44. Re2 Rg3 45. Ng4 {e5 ist eine echte Drohung.} Rxh3 {Weiss muss nun ...Tg3 beachten.} 46. e5 Rf3 47. e6 Rf8 48. e7 Re8 49. Nh6 $1 h3 50. Nf5 {[#] Und weiter mit Th2 wäre nett.} Bf6 $1 51. a3 b5 ({Günstiger ist} 51... Ka5 $17) 52. b4 $11 cxb4 53. axb4 {[#]} Bxe7 $1 {[%mdl 512]} 54. Nxe7 (54. Rxe7 Rxe7) 54... h2 55. Rxh2 {Und Th7 würde nun gewinnen.} Rxe7 { KT-KT} 56. Rh6 Kb6 57. Kc3 Rd7 58. Rg6 Kc7 59. Rh6 Rd6 60. Rh8 $1 Rg6 61. Ra8 $1 Kb7 62. Rh8 Rg5 63. Rh7+ Kb6 64. Rh6 Rg1 {Weiss sollte ...a5 verhindern.} 65. Kc2 Rf1 66. Rg6 Rh1 67. Rf6 Rh8 68. Kc3 Ra8 {Mit der Idee ...a5.} 69. d4 Rd8 70. Rh6 Rd7 71. Rg6 Kc7 72. Rg5 Rd6 73. Rg8 Rh6 74. Ra8 Rh3+ 75. Kc2 Ra3 76. Kb2 Ra4 77. Kc3 $1 a6 78. Rh8 Ra3+ 79. Kb2 Rg3 (79... Rd3 {feels hotter.} 80. Rh7+ Kd6 81. Ra7 Rxd4 82. Ka3 Rd3+) 80. Kc2 Rg5 81. Rh6 Rd5 82. Kc3 Rd6 83. Rh8 $1 Rg6 84. Kc2 Kb7 85. Kc3 Rg3+ 86. Kc2 Rg1 87. Rh5 Rg2+ 88. Kc3 $1 Rg3+ 89. Kc2 Rg4 90. Kc3 Kb6 91. Rh6 Rg5 92. Rf6 Rh5 93. Rg6 Rh3+ 94. Kc2 Rh5 95. Kc3 $1 Rd5 96. Rh6 Kc7 97. Rh7+ Rd7 98. Rh5 Rd6 99. Rh8 $1 Rg6 100. Rf8 Rg3+ 101. Kc2 Ra3 102. Rf7+ Kd6 103. Ra7 $1 Kd5 {Droht stark ...Kc4.} 104. Kb2 Rd3 105. Rxa6 Rxd4 106. Kb3 Re4 107. Kc3 Rc4+ 108. Kb3 Kd4 109. Rb6 $1 {Die Stellung ist ausgeglichen.} Kd3 110. Ra6 Rc2 111. Rb6 $1 Rc3+ 112. Kb2 Rc4 113. Kb3 Kd4 114. Ra6 Kd5 115. Ra8 {Precision: Weiß = 71%, Schwarz = 67%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.10"] [Round "2"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "D37"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "97"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,97,29,29,13,15,18,14,10,20,0,33,0,0,0,0,-9,-12,-15,-9,-9,-9,-14,0, -40,-39,-49,6,-14,-14,-14,-14,-14,-14,-14,-17,-17,-25,-33,-33,-33,-33,-33,-33, -33,-33,-38,-38,-80,-80,-94,-25,-27,-27,-35,-34,-88,-88,-88,-88,-122,-122,-122, -122,-122,-32,-32,-32,-32,-32,-32,-32,-32,-32,-32,-32,-32,0,-8,0,-32]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. Rd1 Rd8 {LiveBook: 10 Games. D37: Queen's Gambit Declined: 5 Bf4} (10... Re8 11. Nd2 e5 12. Bg5 Nd4 13. Qc1 Bf5 14. Bxf6 Nc2+ 15. Ke2 Nd4+ 16. Ke1 Nc2+ 17. Ke2 Nd4+ 18. Ke1 {1/2-1/2 (18) So,W (2778)-Nakamura,H (2769) Paris 2018}) 11. Be2 Ne4 $146 ({Predecessor:} 11... a6 12. O-O dxc4 13. Bxc4 Rxd1 14. Rxd1 b5 15. Bd3 Be7 16. Ne4 Bb7 17. Nxf6+ Bxf6 18. Bxh7+ Kh8 19. Rd7 Nd8 20. Bc7 Qa4 {1/2-1/2 (20) Mason,D (2167)-Tambini,J (2047) Aberystwyth 2014} ) 12. O-O Nxc3 13. bxc3 h6 14. a4 Ne7 15. Ne5 Bd6 16. cxd5 Nxd5 17. Bf3 Nxf4 18. exf4 Bxe5 19. Rxd8+ Qxd8 20. fxe5 Qc7 21. Rb1 Rb8 22. Qd3 Bd7 (22... b6 $15 ) 23. a5 Bc6 {White should prevent ...Bxf3.} 24. Qd6 Qxd6 25. exd6 Bxf3 26. gxf3 $11 {[%mdl 4096] Endgame KR-KR} Kf8 27. c4 {c5 is the strong threat.} Ke8 28. a6 b6 29. c5 $1 Kd7 {Hoping for ...Kc6.} 30. cxb6 axb6 31. a7 $1 {[%cal Ra7b8]} Ra8 {Threatens to win with ...Kc6.} 32. Rxb6 {Black must now prevent Rb7+.} Rxa7 33. Kg2 e5 34. Rb4 f5 ({Black should play} 34... Kxd6 $17 35. f4 exf4 36. Rxf4 Ke6) 35. Rb6 Ke6 36. d7+ Kxd7 37. Rb5 ({Better is} 37. f4 $1 $15) 37... Ke6 $17 38. Rb6+ {[#]} Kf7 $1 39. Rb5 Kf6 40. Rb6+ Kg5 41. Rb5 {[#]} Kf4 (41... Re7 $1 $17 42. Kg3 f4+ 43. Kh3 Re8) 42. Rb4+ $15 e4 43. fxe4 fxe4 44. h3 Ra5 45. Rb7 Rg5+ 46. Kf1 Rg6 47. Rb4 Rg5 48. Rb7 Rg6 49. Rb4 {Precision: White = 62%, Black = 70%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.12"] [Round "3"] [White "Caruana, Fabiano"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "B31"] [WhiteElo "2832"] [BlackElo "2835"] [Annotator "TA"] [PlyCount "97"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,97,20,12,14,10,21,27,13,37,25,30,23,34,29,34,37,32,27,27,26,35,30,33, 25,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-4,0,0,0,-8,-8,-14,-12,-14,-8,-8,-8,-32,-8, -12,-8,-22,-8,-19,-8,-24,-22,-34,-8,-8,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8, -8,-8,-8,-8,-8,-8,-8,-8,-8]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. d3 Bg7 6. O-O Qc7 7. Re1 e5 {LiveBook: 14 Games} 8. a3 {B31: Sicilian: 2...Nc6 3 Bb5 g6} (8. Be3 b6 9. a3 Nf6 10. h3 O-O 11. Nbd2 a5 12. b4 cxb4 13. axb4 a4 14. Nc4 Nd7 15. Qd2 Ba6 16. Na3 Rfe8 17. c4 b5 18. Rac1 Qb7 19. c5 Rad8 20. Bh6 Bh8 21. Bg5 {1/2-1/2 (21) Balogh,C (2632)-Azarov,S (2552) Czech Republic 2017}) 8... Nf6 9. b4 O-O 10. Nbd2 {White has an edge.} Bg4 $146 ({Predecessor:} 10... cxb4 11. Bb2 Nh5 12. axb4 Nf4 13. Ra3 Re8 14. Qa1 a6 15. d4 exd4 16. Bxd4 Bxd4 17. Nxd4 Qe7 18. Rf3 Nxg2 19. e5 Nxe1 {0-1 (19) Kaiszauri,K (2405)-Cramling,D (2355) Boras 1979}) 11. h3 Bxf3 12. Nxf3 cxb4 13. axb4 a5 14. bxa5 Rxa5 15. Bd2 Raa8 16. Qb1 Nd7 17. Qb4 Rfe8 18. Bc3 b5 19. Rxa8 Rxa8 20. Ra1 Rxa1+ 21. Bxa1 Qa7 22. Bc3 Qa2 23. Qb2 Qxb2 24. Bxb2 $11 {[%mdl 4096] Endgame KBN-KBN} f6 25. Kf1 Kf7 26. Ke2 Nc5 27. Bc3 Ne6 28. g3 Bf8 29. Nd2 Ng5 30. h4 Ne6 31. Nb3 h5 32. Bd2 Bd6 33. c3 c5 34. Be3 Ke7 35. Kd1 Kd7 36. Kc2 f5 37. Kd1 fxe4 38. dxe4 {The position is equal.} c4 39. Nd2 Nc5 40. Bxc5 Bxc5 {KB-KN} 41. Ke2 Kc6 42. Nf1 b4 43. cxb4 Bxb4 44. Ne3 Kc5 45. f4 exf4 46. gxf4 Ba5 47. f5 gxf5 {[#]} 48. Nxc4 $1 {[%mdl 512]} Kxc4 49. exf5 {Precision: White = 62%, Black = 72%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.13"] [Round "4"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "A29"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "67"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,67,14,2,8,17,22,16,15,13,14,6,5,5,24,21,41,0,0,-1,0,0,18,14,14,14,15, 19,27,7,28,10,10,1,14,0,7,2,8,0,15,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5 {A29: English Opening: Four Knights Variation with 4 g3} 7. O-O O-O 8. d3 {LiveBook: 13 Games} Re8 9. Bd2 Nxc3 10. Bxc3 Nd4 11. b4 $146 ({Predecessor:} 11. Rc1 Bb6 12. Re1 Bg4 13. Bxd4 exd4 14. a3 {1/2-1/2 (67) So,W (2778)-Caruana,F (2816) Paris 2018}) 11... Bd6 12. Rb1 Nxf3+ 13. Bxf3 a6 14. a4 c6 15. Re1 Bd7 16. e3 Qf6 17. Be4 Bf5 18. Qf3 Bxe4 19. Qxf6 gxf6 20. dxe4 b5 21. Red1 Bf8 22. axb5 axb5 {The position is equal.} 23. Kg2 Red8 24. Rdc1 Kg7 25. Be1 Rdc8 26. Rc2 Ra4 27. Kf3 h5 28. Ke2 Kg6 29. h3 f5 30. exf5+ Kxf5 31. f3 Be7 32. e4+ Ke6 33. Bd2 Bd6 34. Rbc1 { Precision: White = 51%, Black = 51%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.15"] [Round "5"] [White "Caruana, Fabiano"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "B31"] [WhiteElo "2832"] [BlackElo "2835"] [Annotator "TA"] [PlyCount "67"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,67,21,21,21,23,24,13,16,18,16,16,18,5,10,23,23,-8,-17,-10,-22,-5,-13, -19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4 Nxb4 7. Bb2 {B31: Sicilian: 2...Nc6 3 Bb5 g6} a6 (7... Qc7 8. c3 Nc6 9. d4 d6 10. d5 a6 11. Na3 Ke7 12. Bf1 Nd8 13. Nc4 b5 14. Ne3 Nf6 {0-1 (44) Rapport,R (2676)-Granda Zuniga,J (2665) Camarinas 2013}) 8. a3 axb5 9. axb4 Rxa1 10. Bxa1 {LiveBook: 3 Games} d6 11. bxc5 Ne7 12. Qe2 $146 ({Predecessor:} 12. cxd6 Qxd6 13. d4 exd4 14. Bxd4 O-O {0-1 (46) Polschikov,A (2270)-Anoshkin,A (2386) Pardubice 2007}) 12... b4 $1 13. Qc4 Qa5 {[#] Strongly threatening ...Be6.} 14. cxd6 Be6 15. Qc7 Qxc7 16. dxc7 Nc6 17. c3 {aiming for d4.} Kd7 {And now ...Ra8 would win.The position is equal.} 18. cxb4 Ra8 19. Bc3 Kxc7 20. d3 Kb6 21. Bd2 Rd8 22. Be3+ Kb5 23. Nc3+ Kxb4 24. Nd5+ $1 Bxd5 25. exd5 Rxd5 26. Rb1+ Kc3 27. Rxb7 {Black must now prevent Rc7.} Nd8 $1 {[%cal Rd8b7]} 28. Rc7+ Kxd3 29. Kf1 h5 30. h3 Ke4 31. Ng5+ Kf5 32. Nxf7 Nxf7 33. Rxf7+ Bf6 34. g4+ {Precision: White = 70%, Black = 92%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.16"] [Round "6"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "C42"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "160"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,160,29,26,16,4,8,10,6,16,14,14,14,16,18,0,6,17,17,16,14,12,11,17,17, 14,15,14,15,22,17,14,16,15,16,9,-12,-5,-12,-6,-13,-18,-9,-2,-2,-1,-1,-9,-7,-4, -9,-4,-7,0,0,0,0,0,0,0,-9,-8,-22,-23,-26,-26,-27,-23,-38,-41,-43,-40,-42,-25, -30,-30,-30,-36,-37,-38,-73,-72,-66,-73,-74,-70,-69,-62,-97,-93,-100,-95,-93, -93,-92,-92,-93,-92,-92,-79,-127,-102,-135,-124,-110,-110,-151,-151,-151,-151, -151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-151, -151,-366,-366,-352,-151,-151,-151,-151,-151,-151,-151,-151,0,-151,-151,-151, -151,-151,-151,-151,-151,-151,-151,-151,-151,-151,-8,-8,-8]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3 {[%cal Be5d3,Bd3f4,Bf4d5][%mdl 32]} (4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Nc3 Nxc3 10. bxc3 dxc4 11. Bxc4 Bf5 12. Ng5 h6 13. Qf3 Bg6 14. Ne4 Bxh2+ 15. Kxh2 Qh4+ 16. Qh3 Qxh3+ 17. gxh3 Bxe4 18. Rg1 Re8 19. Bxh6 g6 {1/2-1/2 (52) Vachier Lagrave,M (2780)-Wang,H (2722) Douglas 2018}) (4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 Nc6 8. Bc4 O-O 9. Qd2 Bf5 10. O-O-O Qd7 11. Kb1 Rfe8 12. h4 Bf8 13. h5 h6 14. Be2 Bg4 15. Nh2 Bxe2 16. Qxe2 {1/2-1/2 (41) Carlsen,M (2842)-Caruana,F (2822) Saint Louis 2018}) 4... Nxe4 5. Qe2 Qe7 {LiveBook: 14 Games} 6. Nf4 {And now Nd5 would win. C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} Nc6 {[%cal Bb8c6,Bc6d4, Bd4e2][%mdl 32]} 7. Nd5 Nd4 {[%mdl 64] ...Qe5 is the strong threat. Double Attack} 8. Nxe7 Nxe2 9. Nd5 Nd4 $1 {[%cal Rd4c2]} 10. Na3 $146 ({Predecessor:} 10. Bd3 Nxf2 11. Kxf2 Kd8 12. Re1 c5 13. c3 c4 14. cxd4 cxd3 {0-1 (47) Baudifier,Y (1600)-Sochacki,C (1009) France 2002}) 10... Ne6 11. f3 N4c5 12. d4 Nd7 13. c3 c6 14. Nf4 Nb6 15. Bd3 d5 16. Nc2 Bd6 17. Nxe6 Bxe6 18. Kf2 h5 19. h4 Nc8 20. Ne3 Ne7 21. g3 c5 22. Bc2 O-O 23. Rd1 Rfd8 24. Ng2 cxd4 25. cxd4 Rac8 26. Bb3 Nc6 {[%cal Be7c6,Bc6a5,Ba5c4,Bc4a3][%mdl 32]} 27. Bf4 Na5 28. Rdc1 Bb4 29. Bd1 Nc4 30. b3 Na3 31. Rxc8 Rxc8 32. Rc1 Nb5 33. Rxc8+ Bxc8 34. Ne3 Nc3 35. Bc2 Ba3 36. Bb8 a6 37. f4 Bd7 38. f5 Bc6 39. Bd1 Bb2 40. Bxh5 Ne4+ { [%mdl 64] Discovered Attack} 41. Kg2 Bxd4 42. Bf4 Bc5 43. Bf3 Nd2 44. Bxd5 Bxe3 $1 45. Bxc6 Bxf4 46. Bxb7 Bd6 $1 47. Bxa6 Ne4 48. g4 Ba3 $1 49. Bc4 Kf8 50. g5 Nc3 $1 51. b4 Bxb4 52. Kf3 Na4 53. Bb5 Nc5 54. a4 f6 55. Kg4 Ne4 56. Kh5 Be1 $1 57. Bd3 Nd6 $1 58. a5 Bxa5 {Strongly threatening ...Nf7.} 59. gxf6 gxf6 { Threatens to win with ...Nf7.} 60. Kg6 Bd8 61. Kh7 Nf7 62. Bc4 Ne5 63. Bd5 Ba5 64. h5 Bd2 65. Ba2 Nf3 66. Bd5 Nd4 67. Kg6 $2 {[#]} (67. Bc4 $17) 67... Bg5 $1 $19 68. Bc4 {[#]} Nf3 (68... Bh4 $1 $19 {has better winning chances.} 69. Bd5 Ne2) 69. Kh7 $17 Ne5 70. Bb3 Ng4 71. Bc4 Ne3 72. Bd3 Ng4 73. Bc4 $1 Nh6 74. Kg6 Ke7 75. Bb3 Kd6 76. Bc2 Ke5 77. Bd3 Kf4 78. Bc2 Ng4 79. Bb3 Ne3 ({Better is} 79... Kg3 $17 {Hoping for ...Nh6.} 80. Bf7 Kf2) 80. h6 $11 {[#]} Bxh6 $1 { [%mdl 512] Accuracy: White = 68%, Black = 83%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.18"] [Round "7"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "D37"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "79"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,79,18,18,18,27,20,36,0,24,6,10,0,6,0,6,10,11,1,9,0,5,5,12,12,12,7,5, 8,6,7,6,4,6,6,12,0,4,4,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. Nd2 {[#] Strongly threatening cxd5. D37: Queen's Gambit Declined: 5 Bf4} (10. O-O-O Be7 11. Kb1 a6 12. g4 dxc4 13. Bxc4 b5 14. g5 bxc4 15. gxf6 Bxf6 16. Ne4 Be7 17. Rhg1 Rd8 18. Rxd8+ Nxd8 19. Qxc4 {1/2-1/2 (27) Karjakin,S (2773)-Nakamura,H (2777) Saint Louis 2018}) 10... Qd8 11. Nb3 { Threatens to win with cxd5.} Bb6 $146 ({Predecessor:} 11... Be7 12. Rd1 a5 13. cxd5 exd5 14. Be2 a4 15. Nd4 Qa5 16. O-O Bd7 17. Ndb5 Rfc8 {1-0 (36) Golod,V (2584)-Gershkowich,D (2341) Haifa 2008}) 12. Be2 {White is slightly better.} Qe7 13. Bg5 dxc4 {The position is equal.} 14. Nd2 Ne5 15. O-O Bd7 16. Bf4 Ng6 17. Bg3 Bc6 18. Nxc4 {Black must now prevent Bd6.} Bc7 19. Rfd1 Rfd8 20. Rxd8+ Rxd8 21. Rd1 Rxd1+ 22. Qxd1 Nd5 23. Qd4 Nxc3 24. Qxc3 Bxg3 25. hxg3 Qd7 26. Bd3 b6 27. f3 Bb7 28. Bxg6 hxg6 29. e4 Qc7 30. e5 Qc5+ 31. Kh2 Ba6 32. Nd6 Qxc3 33. bxc3 $11 {[%mdl 4096] Endgame KB-KN} f6 34. f4 Kf8 35. Kg1 Ke7 36. Kf2 Kd7 37. Ke3 Bf1 38. Kf2 Ba6 39. Ke3 Bf1 40. Kf2 {Accuracy: White = 73%, Black = 77%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.19"] [Round "8"] [White "Caruana, Fabiano"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "B33"] [WhiteElo "2832"] [BlackElo "2835"] [Annotator "TA"] [PlyCount "75"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,75,0,0,0,2,0,18,23,18,18,12,9,13,12,19,20,28,0,44,35,65,50,70,80,125, 95,97,86,73,22,13,23,20,18,18,18,18,18,17,17,12,24,25,25,25,25,43,45,61,8,12,0, 0,0,18,0,-2,-2]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Be7 10. Be2 O-O 11. O-O {B33: Sicilian: Pelikan and Sveshnikov Variations} Nd7 12. Bd2 f5 ( 12... a6 13. Na3 a5 14. Nc4 b6 15. f4 Ba6 16. Ne3 Bb7 17. Bc3 g6 18. Bb5 Ba6 19. Bxd7 Qxd7 {1-0 (53) Oparin,G (2602)-Gelfand,B (2697) Moscow 2017}) 13. a5 a6 14. Na3 {[%cal Bb5a3,Ba3c4,Bc4b6][%mdl 32]} e4 $146 ({Predecessor:} 14... Nf6 15. Bb4 Bd7 16. Nc4 Bb5 17. Nb6 Bxe2 18. Qxe2 {1-0 (71) Voll,A (2572) -Saidashev,A (2401) ICCF email 2015}) 15. Nc4 Ne5 16. Nb6 $36 {[%mdl 2048] White fights for an advantage.} Rb8 17. f4 exf3 18. Bxf3 g5 19. c4 f4 20. Bc3 Bf5 21. c5 Nxf3+ 22. Qxf3 dxc5 23. Rad1 Bd6 {Black wants to play ...g4.} 24. h3 (24. Nc4 $16) 24... Qe8 $11 25. Nc4 Qg6 $1 26. Nxd6 Qxd6 {[#]} 27. h4 $1 { [%mdl 512]} gxh4 28. Qxf4 Qxf4 29. Rxf4 h5 30. Re1 {Strongly threatening Re7.} Bg4 31. Rf6 Rxf6 32. Bxf6 {[%mdl 4096] Endgame KRB-KRB} Kf7 33. Bxh4 Re8 34. Rf1+ ({White should play} 34. Rxe8 $14 Kxe8 35. Kf2) 34... Kg8 {The position is equal.} 35. Rf6 Re2 36. Rg6+ Kf8 37. d6 {Rxg4! is the strong threat.} Rd2 ({ Avoid the trap} 37... Rxb2 $2 {[#]} 38. Rxg4 $1 {[%mdl 512]} Rd2 39. Rc4 $18) 38. Rg5 {Accuracy: White = 71%, Black = 77%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.21"] [Round "9"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "A29"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "112"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,112,0,0,29,31,12,-10,4,-4,0,0,0,0,0,0,0,-13,6,-17,5,13,15,11,17,0,58, 49,48,47,47,47,48,54,54,45,55,47,60,67,62,29,31,14,20,0,0,0,0,0,0,0,0,0,0,0,8, 8,8,8,8,8,8,8,8,0,8,8,8,8,8,8,8,8,8,8,8,8,31,31,59,12,59,59,59,59,59,59,59,59, 59,12,59,12,45,59,59,12,66,22,24,24,24,28,67]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5 {A29: English Opening: Four Knights Variation with 4 g3} 7. O-O O-O 8. d3 Re8 {The position is equal.} (8... Bb6 9. Nxd5 Qxd5 10. Bd2 Qd6 11. Bc3 Re8 12. Nd2 Qh6 13. b4 Bh3 14. b5 Bxg2 15. Kxg2 {1/2-1/2 (56) Ding,L (2804)-Navara,D (2740) Batumi 2018}) 9. Bg5 Nxc3 10. bxc3 f6 11. Bc1 $146 ({Predecessor:} 11. Be3 Bxe3 12. fxe3 Be6 13. Qa4 Qe7 14. Nh4 Qc5 { 0-1 (46) Curic,D (2195)-Majeric,Z (2312) Sibenik 2008}) 11... Be6 12. Bb2 Bb6 13. d4 Bd5 14. Qc2 exd4 15. cxd4 Be4 16. Qb3+ Bd5 17. Qd1 Bxf3 (17... Qd7 $11) 18. Qb3+ Kh8 19. Bxf3 Nxd4 20. Bxd4 Qxd4 21. e3 Qe5 22. Bxb7 Rad8 23. Rad1 Qe7 24. h4 g6 25. h5 gxh5 26. Qc4 f5 27. Bf3 h4 28. Rxd8 Rxd8 29. gxh4 Rg8+ 30. Kh1 Qf6 31. Qf4 Bc5 32. Rg1 Rxg1+ 33. Kxg1 Bd6 34. Qa4 f4 35. Qxa7 fxe3 36. Qxe3 Qxh4 37. a4 Qf6 38. Bd1 (38. Qb3 {seems wilder.} Kg7 39. Kf1 Qa1+ 40. Kg2 Qe5 41. Qd3) 38... Qe5 39. Qxe5+ Bxe5 $11 {[%mdl 4096] Endgame KB-KB} 40. a5 Kg7 41. a6 {[#] a7 is the strong threat.} Bd4 42. Kg2 Kf6 43. f4 Bb6 44. Kf3 h6 45. Ke4 Ba7 46. Bg4 $1 Bg1 47. Kd5 Bb6 48. Kc6 Be3 49. Kb7 Bb6 50. Bh3 Be3 51. Kc6 (51. f5 $5 {[%cal Rb7c7]} Bb6 52. Bg4 $14) 51... Bb6 52. Kd5 Ba7 53. Ke4 Bb6 ( 53... c5 $11) 54. Bf1 Ke6 55. Bc4+ Kf6 $1 56. Bd3 Ke6 {Accuracy: White = 52%, Black = 65%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.22"] [Round "10"] [White "Caruana, Fabiano"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "B33"] [WhiteElo "2832"] [BlackElo "2835"] [Annotator "TA"] [PlyCount "107"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 21,107,1,23,9,0,-8,3,0,0,0,0,0,0,0,0,0,0,-26,-9,-41,-8,-20,0,0,0,0,94, -3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,48,54,108,108,108,108,116,116,116,116,116,116,116,108,108,108,108,108,108, 108]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. a4 Be7 10. Be2 O-O 11. O-O {B33: Sicilian: Pelikan and Sveshnikov Variations} Nd7 {LiveBook: 51 Games} 12. b4 $146 ({Predecessor:} 12. Bd2 a6 13. Na3 a5 14. Nc4 b6 15. f4 Ba6 16. Ne3 Bb7 17. Bc3 g6 18. Bb5 Ba6 19. Bxd7 Qxd7 {1-0 (53) Oparin,G (2602)-Gelfand,B (2697) Moscow 2017}) 12... a6 13. Na3 {The position is equal.} a5 14. bxa5 Rxa5 15. Nc4 Ra8 16. Be3 f5 17. a5 f4 18. Bb6 $36 {[%mdl 2048] White fights for an advantage.} Qe8 19. Ra3 Qg6 20. Bc7 e4 21. Kh1 $1 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 22. Nb6 $1 {[%cal Rb6a8]} Nxb6 23. Bxb6 Qg5 (23... b4 $11 {remains equal.} 24. Ra4 Bf6) 24. g3 (24. Bxb5 $16 Rf6 25. Bc6) 24... b4 25. Rb3 Bh3 26. Rg1 $1 {[#] And now gxf4 would win.} f3 27. Bf1 Bxf1 28. Qxf1 Qxd5 29. Rxb4 Qe6 30. Rb5 Bd8 {aiming for ...Bxb6.} 31. Qe1 Bxb6 32. axb6 Rab8 33. Qe3 Qc4 34. Rb2 Rb7 35. Rd1 Qe2 36. Re1 Qxe3 37. Rxe3 $11 {[%mdl 4096] Endgame KRR-KRR} d5 38. h4 Rc8 39. Ra3 Kf7 40. Kh2 Ke6 41. g4 Rc6 42. Ra6 Ke5 43. Kg3 h6 44. h5 Kd4 45. Rb5 Rd6 (45... e3 $14) 46. Ra4+ $16 {White is better.} Ke5 {[#]} 47. Rab4 $1 Ke6 48. c4 dxc4 49. Rxc4 Rdxb6 50. Rxe4+ Kf7 51. Rf5+ Rf6 52. Rxf6+ Kxf6 53. Kxf3 Kf7 54. Kg3 {Accuracy: White = 78%, Black = 66%.} 1/2-1/2 [Event "World Chess Championship 2018"] [Site "London"] [Date "2018.11.24"] [Round "11"] [White "Carlsen, Magnus"] [Black "Caruana, Fabiano"] [Result "1/2-1/2"] [ECO "C42"] [WhiteElo "2835"] [BlackElo "2832"] [Annotator "TA"] [PlyCount "110"] [EventDate "2018.10.20"] [EventType "match"] [EventCountry "ENG"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 21,110,20,39,33,37,32,31,26,26,13,13,12,20,18,18,22,20,20,20,22,20,5,5, 6,16,12,11,10,13,1,46,50,52,27,58,58,60,59,59,59,62,56,56,56,56,56,56,56,56,51, 51,51,54,54,56,56,56,56,56,36,37,37,36,36,36,36,36,36,36,36,35,31,31,31,31,31, 31,31,26,26,26,26,31,26,26,0,31,31,31,26,31]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Be3 O-O 8. Qd2 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} Nd7 9. O-O-O Nf6 10. Bd3 c5 11. Rhe1 Be6 { LiveBook: 3 Games} 12. Kb1 $146 ({Predecessor:} 12. Bg5 Qa5 13. a3 Rfe8 14. Bxf6 Bxf6 15. Ng5 Bxg5 16. Qxg5 {1/2-1/2 (46) Giri,A (2772)-Motylev,A (2675) Tbilisi 2017}) 12... Qa5 13. c4 Qxd2 14. Bxd2 {Threatening Ng5.} h6 15. Nh4 Rfe8 16. Ng6 Ng4 17. Nxe7+ Rxe7 18. Re2 Ne5 19. Bf4 Nxd3 20. Rxd3 Rd7 21. Rxd6 Rxd6 22. Bxd6 $11 {[%mdl 4096] Endgame KRB-KRB} Rd8 23. Rd2 Bxc4 24. Kc1 b6 25. Bf4 Rxd2 (25... Re8 {looks sharper.} 26. Rd7 Re1+ 27. Kd2 Re2+ 28. Kc3 Bxa2 29. b3 Rxf2 30. Bg3 Rxg2 31. Kb2 f5) 26. Kxd2 {KB-KB} a6 27. a3 Kf8 28. Bc7 b5 29. Bd6+ Ke8 30. Bxc5 h5 31. Ke3 Kd7 32. Kd4 g6 33. g3 Be2 34. Bf8 Kc6 35. b3 Bd1 36. Kd3 Bg4 37. c4 Be6 38. Kd4 bxc4 39. bxc4 Bg4 40. c5 Be6 41. Bh6 Bd5 42. Be3 Be6 43. Ke5 Bd5 44. Kf4 Be6 45. Kg5 Bd5 46. g4 hxg4 47. Kxg4 Ba2 48. Kg5 Bb3 49. Kf6 Ba2 50. h4 Bb3 51. f4 {[%cal Bf2f4,Bf4f5][%mdl 32]} Ba2 52. Ke7 Bb3 53. Kf6 Ba2 54. f5 Bb1 55. Bf2 Bc2 {Accuracy: White = 55%, Black = 82%.} 1/2-1/2
Matthew will also be bringing us AlphaZero’s thoughts on the remaining games of the match, while it looks like we’re going to be hearing a lot more from AlphaZero in the coming year. Game Changer, the book on AlphaZero by Matthew Sadler and Natasha Regan, has a planned release date of early 2019.

Matthew Sadler and Natasha Regan also co-authored the award-winning Chess for Life

DeepMind for their support. C24
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