2a:null 2b:["$","title",null,{"children":"Chess Statistics | Dmitry Baranovskiy | Observable"}] 31:T4942,viewof pgn = Inputs.textarea({ label: "PGN", monospace: true, rows: 10, value: ` [Event "FIDE World Championship 2021"] [Site "?"] [Date "2021.11.26"] [Round "1"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "C88"] [WhiteElo "2782"] [BlackElo "2855"] [PlyCount "89"] [EventDate "2021.??.??"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. h3 Na5 9. Nxe5 Nxb3 10. axb3 Bb7 11. d3 d5 12. exd5 Qxd5 13. Qf3 Bd6 14. Kf1 Rfb8 15. Qxd5 Nxd5 16. Bd2 c5 17. Nf3 Rd8 18. Nc3 Nb4 19. Rec1 Rac8 20. Ne2 Nc6 21. Be3 Ne7 22. Bf4 Bxf3 23. gxf3 Bxf4 24. Nxf4 Rc6 25. Re1 Nf5 26. c3 Nh4 27. Re3 Kf8 28. Ng2 Nf5 29. Re5 g6 30. Ne1 Ng7 31. Re4 f5 32. Re3 Ne6 33. Ng2 b4 34. Ke2 Rb8 35. Kd2 bxc3+ 36. bxc3 Rxb3 37. Kc2 Rb7 38. h4 Kf7 39. Ree1 Kf6 40. Ne3 Rd7 41. Nc4 Re7 42. Ne5 Rd6 43. Nc4 Rc6 44. Ne5 Rd6 45. Nc4 1/2-1/2 [Event "FIDE World Championship 2021"] [Site "?"] [Date "2021.11.26"] [Round "2"] [White "Carlsen, Magnus"] [Black "Nepomniachtchi, Ian"] [Result "1/2-1/2"] [ECO "E05"] [WhiteElo "2855"] [BlackElo "2782"] [PlyCount "116"] [EventDate "2021.??.??"] [SourceVersionDate "2021.11.27"] 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 b5 8. Ne5 c6 9. a4 Nd5 10. Nc3 f6 11. Nf3 Qd7 12. e4 Nb4 13. Qe2 Nd3 14. e5 Bb7 15. exf6 Bxf6 16. Ne4 Na6 17. Ne5 Bxe5 18. dxe5 Nac5 19. Nd6 Nb3 20. Rb1 Nbxc1 21. Rbxc1 Nxc1 22. Rxc1 Rab8 23. Rd1 Ba8 24. Be4 c3 25. Qc2 g6 26. bxc3 bxa4 27. Qxa4 Rfd8 28. Ra1 c5 29. Qc4 Bxe4 30. Nxe4 Kh8 31. Nd6 Rb6 32. Qxc5 Rdb8 33. Kg2 a6 34. Kh3 Rc6 35. Qd4 Kg8 36. c4 Qc7 37. Qg4 Rxd6 38. exd6 Qxd6 39. c5 Qxc5 40. Qxe6+ Kg7 41. Rxa6 Rf8 42. f4 Qf5+ 43. Qxf5 Rxf5 44. Ra7+ Kg8 45. Kg4 Rb5 46. Re7 Ra5 47. Re5 Ra7 48. h4 Kg7 49. h5 Kh6 50. Kh4 Ra1 51. g4 Rh1+ 52. Kg3 gxh5 53. Re6+ Kg7 54. g5 Rg1+ 55. Kf2 Ra1 56. Rh6 Ra4 57. Kf3 Ra3+ 58. Kf2 Ra4 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.11.26"] [Round "3"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "C88"] [WhiteElo "2782"] [BlackElo "2855"] [PlyCount "81"] [EventDate "2021.??.??"] [SourceVersionDate "2021.11.28"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 Bb7 9. d3 d6 10. Nbd2 Re8 11. Nf1 h6 12. Bd2 Bf8 13. Ne3 Ne7 14. c4 bxc4 15. Nxc4 Nc6 16. Rc1 a5 17. Bc3 Bc8 18. d4 exd4 19. Nxd4 Nxd4 20. Qxd4 Be6 21. h3 c6 22. Bc2 d5 23. e5 dxc4 24. Qxd8 Rexd8 25. exf6 Bb4 26. fxg7 Bxc3 27. bxc3 Kxg7 28. Kf1 Rab8 29. Rb1 Kf6 30. Rxb8 Rxb8 31. Rb1 Rxb1+ 32. Bxb1 Ke5 33. Ke2 f5 34. Bc2 f4 35. Bb1 c5 36. Bc2 Bd7 37. f3 Kf6 38. h4 Ke5 39. Kf2 Kf6 40. Ke2 Ke5 41. Kf2 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Date "2021.11.30"] [Round "4"] [White "Carlsen, Magnus"] [Black "Nepomniachtchi, Ian"] [Result "1/2-1/2"] [ECO "C42"] [WhiteElo "2885"] [BlackElo "2782"] [PlyCount "65"] [EventDate "2021.11.30"] [SourceVersionDate "2021.11.30"] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Re1 Bf5 10. Qb3 Qd7 11. Nc3 Nxc3 12. Bxf5 Qxf5 13. bxc3 b6 14. cxd5 cxd5 15. Qb5 Qd7 16. a4 Qxb5 17. axb5 a5 18. Nh4 g6 19. g4 Nd7 20. Ng2 Rfc8 21. Bf4 Bxf4 22. Nxf4 Rxc3 23. Nxd5 Rd3 24. Re7 Nf8 25. Nf6+ Kg7 26. Ne8+ Kg8 27. d5 a4 28. Nf6+ Kg7 29. g5 a3 30. Ne8+ Kg8 31. Nf6+ Kg7 32. Ne8+ Kg8 33. Nf6+ 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.01"] [Round "5"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "C88"] [WhiteElo "2782"] [BlackElo "2855"] [PlyCount "85"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.01"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 Rb8 9. axb5 axb5 10. h3 d6 11. c3 b4 12. d3 bxc3 13. bxc3 d5 14. Nbd2 dxe4 15. dxe4 Bd6 16. Qc2 h6 17. Nf1 Ne7 18. Ng3 Ng6 19. Be3 Qe8 20. Red1 Be6 21. Ba4 Bd7 22. Nd2 Bxa4 23. Qxa4 Qxa4 24. Rxa4 Ra8 25. Rda1 Rxa4 26. Rxa4 Rb8 27. Ra6 Ne8 28. Kf1 Nf8 29. Nf5 Ne6 30. Nc4 Rd8 31. f3 f6 32. g4 Kf7 33. h4 Bf8 34. Ke2 Nd6 35. Ncxd6+ Bxd6 36. h5 Bf8 37. Ra5 Ke8 38. Rd5 Ra8 39. Rd1 Ra2+ 40. Rd2 Ra1 41. Rd1 Ra2+ 42. Rd2 Ra1 43. Rd1 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.03"] [Round "6"] [White "Carlsen, Magnus"] [Black "Nepomniachtchi, Ian"] [Result "1-0"] [ECO "D02"] [WhiteElo "2855"] [BlackElo "2782"] [PlyCount "271"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.03"] 1. d4 Nf6 2. Nf3 d5 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. b3 c5 7. dxc5 Bxc5 8. c4 dxc4 9. Qc2 Qe7 10. Nbd2 Nc6 11. Nxc4 b5 12. Nce5 Nb4 13. Qb2 Bb7 14. a3 Nc6 15. Nd3 Bb6 16. Bg5 Rfd8 17. Bxf6 gxf6 18. Rac1 Nd4 19. Nxd4 Bxd4 20. Qa2 Bxg2 21. Kxg2 Qb7+ 22. Kg1 Qe4 23. Qc2 a5 24. Rfd1 Kg7 25. Rd2 Rac8 26. Qxc8 Rxc8 27. Rxc8 Qd5 28. b4 a4 29. e3 Be5 30. h4 h5 31. Kh2 Bb2 32. Rc5 Qd6 33. Rd1 Bxa3 34. Rxb5 Qd7 35. Rc5 e5 36. Rc2 Qd5 37. Rdd2 Qb3 38. Ra2 e4 39. Nc5 Qxb4 40. Nxe4 Qb3 41. Rac2 Bf8 42. Nc5 Qb5 43. Nd3 a3 44. Nf4 Qa5 45. Ra2 Bb4 46. Rd3 Kh6 47. Rd1 Qa4 48. Rda1 Bd6 49. Kg1 Qb3 50. Ne2 Qd3 51. Nd4 Kh7 52. Kh2 Qe4 53. Rxa3 Qxh4+ 54. Kg1 Qe4 55. Ra4 Be5 56. Ne2 Qc2 57. R1a2 Qb3 58. Kg2 Qd5+ 59. f3 Qd1 60. f4 Bc7 61. Kf2 Bb6 62. Ra1 Qb3 63. Re4 Kg7 64. Re8 f5 65. Raa8 Qb4 66. Rac8 Ba5 67. Rc1 Bb6 68. Re5 Qb3 69. Re8 Qd5 70. Rcc8 Qh1 71. Rc1 Qd5 72. Rb1 Ba7 73. Re7 Bc5 74. Re5 Qd3 75. Rb7 Qc2 76. Rb5 Ba7 77. Ra5 Bb6 78. Rab5 Ba7 79. Rxf5 Qd3 80. Rxf7+ Kxf7 81. Rb7+ Kg6 82. Rxa7 Qd5 83. Ra6+ Kh7 84. Ra1 Kg6 85. Nd4 Qb7 86. Ra2 Qh1 87. Ra6+ Kf7 88. Nf3 Qb1 89. Rd6 Kg7 90. Rd5 Qb2+ 91. Rd2 Qb1 92. Re2 Qb6 93. Rc2 Qb1 94. Nd4 Qh1 95. Rc7+ Kf6 96. Rc6+ Kf7 97. Nf3 Qb1 98. Ng5+ Kg7 99. Ne6+ Kf7 100. Nd4 Qh1 101. Rc7+ Kf6 102. Nf3 Qb1 103. Rd7 Qc2+ 104. Rd2 Qb1 105. Ng1 Qb4 106. Rd1 Qb3 107. Rd6+ Kg7 108. Rd4 Qb2+ 109. Ne2 Qb1 110. e4 Qh1 111. Rd7+ Kg8 112. Rd4 Qh2+ 113. Ke3 h4 114. gxh4 Qh3+ 115. Kd2 Qxh4 116. Rd3 Kf8 117. Rf3 Qd8+ 118. Ke3 Qa5 119. Kf2 Qa7+ 120. Re3 Qd7 121. Ng3 Qd2+ 122. Kf3 Qd1+ 123. Re2 Qb3+ 124. Kg2 Qb7 125. Rd2 Qb3 126. Rd5 Ke7 127. Re5+ Kf7 128. Rf5+ Ke8 129. e5 Qa2+ 130. Kh3 Qe6 131. Kh4 Qh6+ 132. Nh5 Qh7 133. e6 Qg6 134. Rf7 Kd8 135. f5 Qg1 136. Ng7 1-0 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.04"] [Round "7"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "1/2-1/2"] [ECO "C88"] [WhiteElo "2782"] [BlackElo "2855"] [PlyCount "81"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.04"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 Rb8 9. axb5 axb5 10. h3 d6 11. d3 h6 12. Nc3 Re8 13. Nd5 Bf8 14. Nxf6+ Qxf6 15. c3 Ne7 16. Be3 Be6 17. d4 exd4 18. cxd4 Bxb3 19. Qxb3 Ng6 20. Rec1 c5 21. e5 Qf5 22. dxc5 dxc5 23. Bxc5 Bxc5 24. Rxc5 Nxe5 25. Nxe5 Rxe5 26. Rxe5 Qxe5 27. Qc3 Qxc3 28. bxc3 Rc8 29. Ra5 Rxc3 30. Rxb5 Rc1+ 31. Kh2 Rc3 32. h4 g6 33. g3 h5 34. Kg2 Kg7 35. Ra5 Kf6 36. Rb5 Kg7 37. Ra5 Kf6 38. Rb5 Kg7 39. Ra5 Kf6 40. Ra6+ Kg7 41. Ra7 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.05"] [Round "8"] [White "Carlsen, Magnus"] [Black "Nepomniachtchi, Ian"] [Result "1-0"] [ECO "C43"] [WhiteElo "2856"] [BlackElo "2782"] [PlyCount "91"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.05"] 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Nd7 6. Nxd7 Bxd7 7. Nd2 Nxd2 8. Bxd2 Bd6 9. O-O h5 10. Qe1+ Kf8 11. Bb4 Qe7 12. Bxd6 Qxd6 13. Qd2 Re8 14. Rae1 Rh6 15. Qg5 c6 16. Rxe8+ Bxe8 17. Re1 Qf6 18. Qe3 Bd7 19. h3 h4 20. c4 dxc4 21. Bxc4 b5 22. Qa3+ Kg8 23. Qxa7 Qd8 24. Bb3 Rd6 25. Re4 Be6 26. Bxe6 Rxe6 27. Rxe6 fxe6 28. Qc5 Qa5 29. Qxc6 Qe1+ 30. Kh2 Qxf2 31. Qxe6+ Kh7 32. Qe4+ Kg8 33. b3 Qxa2 34. Qe8+ Kh7 35. Qxb5 Qf2 36. Qe5 Qb2 37. Qe4+ Kg8 38. Qd3 Qf2 39. Qc3 Qf4+ 40. Kg1 Kh7 41. Qd3+ g6 42. Qd1 Qe3+ 43. Kh1 g5 44. d5 g4 45. hxg4 h3 46. Qf3 1-0 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.07"] [Round "9"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "0-1"] [ECO "A13"] [WhiteElo "2782"] [BlackElo "2856"] [Annotator "samsh"] [PlyCount "78"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.07"] {The ninth game saw Nepo avoid 1.e4 for the first time in the match. He actually got quite a nice position early on, but after White was somewhat outplayed to reach an equalish position, the game ended abruptly in one move.} 1. c4 e6 2. g3 d5 3. Bg2 d4 {I was a little surprised to see this move, which sort of invites a kind of Benoni with two tempi less: one because of colors reversed, and a second because e6-e5 will come in two moves rather than one. The move is surely fine objectively, but it felt like it would lead to more dynamic positions than I would expect someone to want with the black pieces and a two-game lead. [During the press conference, Carlsen shared that this was his preparation although he was having trouble recalling all the subsequent lines.]} (3... Nf6 {This would be more typical. I don't really think White has anything better than transposing into a Catalan. With Magnus taking the white side of the Catalan twice already, I assume he would have checked it pretty closely. So it was a bit surprising to see 3...d4 instead.}) 4. Nf3 Nc6 5. O-O Bc5 {This is a pretty unusual setup for Black, but it makes some sense. Black is never too worried about b2-b4 since he can always meet a2-a3 with a7-a5. And the bishop obviously does a good job of lessening the punch of e2-e3, which is the only real way for White to try to open the game.} 6. d3 Nf6 7. Nbd2 {Nepo was still playing pretty fast, if not immediately. I suspect he had checked this line a little but that he had not reviewed it too much and spent more of his efforts on other moves, but he still knew what to do.} 7... a5 8. Nb3 Be7 9. e3 dxe3 10. Bxe3 {Up to here, Magnus was taking some time, but I think he was still in his preparation. He certainly knew where to put his pieces and that he should not be castling right away.} 10... Ng4 $1 {Black harasses the e3-bishop. This is quite a good decision because White's best chance for an edge is to fix his one bad piece with Nf3-d4. This will be harder to pull off now that the bishop is destabilized.} (10... O-O {This looks like a more natural move, but White should be a bit better after} 11. Nbd4 $1 Bd7 12. Nxc6 Bxc6 13. d4 $14) 11. Bc5 O-O {Nepo took a long think here, aiming to find the best way to coordinate his pieces.} 12. d4 $1 {This is not an easy decision. First of all, White loses any hope of playing Nb3-d4 later, and also his knight will be forced to c5 and unable to retreat after. It takes a lot of confidence in your calculation to play this way.} 12... a4 13. Bxe7 Qxe7 14. Nc5 {Now, Magnus needs to find a tough only-move in a very direct position to keep things under control. His ability to coordinate his pieces in a solid but uncomfortable situation is out of this world, and it really showed in just how easily he held these uncomfortable Spanish positions. Here, it is a different story. Black has to be very direct and calculate close lines in a shaky way.} 14... a3 $6 {This is a very human move, but it's also a serious mistake. White now has to be very energetic, but if he finds the way, he is clearly better. One thing I have often said is that Magnus is certainly not perfect, but if you want to beat him, you do have to be accurate. He rarely gives chances, and when he does, you have to be accurate all the way through.} (14... e5 $1 {This was the only way for Black, and even then, he remains a little worse.} 15. Re1 $1 Rd8 $1 {Now, White has a few tempting options, but none of them work too well.} 16. b4 $1 (16. Nxa4 Qb4 $1 17. b3 exd4 $1 {After a precise sequence, Black gets his pawn back, and looks more or less okay to me.}) (16. h3 $2 Nxd4 $1 {Black emerges ahead, as the c5-knight is hanging.})) 15. bxa3 $2 {Already now, the machine still gives some 0.2 for White, but in practice, I actually prefer Black. His position feels very easy to play, and White is the one with long-term weaknesses. The a-file will cause endless annoyances.} (15. b4 $1 {This was the way, and White is clearly better after some complications.} 15... Nxb4 {This has to be the most critical try for a human to worry about.} (15... Rd8 {This is the machine's choice, but after} 16. Rb1 {White is clearly better.}) 16. Rb1 $1 b6 (16... Nc6 17. Nxb7 Rb8 18. Na5 $1 $16 {This is another only-move that White needs to see before pushing b4. It is not too hard, but having to find a bunch of easy-ish only-moves all in advance to justify playing the right way can be tough.}) 17. Rxb4 bxc5 18. Rb5 $1 {An important only-move that White has to see before pushing b2-b4. Black cannot take on d4 and will lose his c5-pawn. The game then continues, but White is surely better due to his superior structure.}) 15... Rd8 16. Nb3 Nf6 17. Re1 Qxa3 18. Qe2 h6 {This is exactly the kind of position where the a-file is a huge problem for White. He needs to play Ne5, and to do this, he needs to secure the d4-pawn. As such, he would very much like to get his a-rook to d1, but this would drop the a2-pawn.} (18... Bd7 {I would have preferred simply tucking the bishop away on e8, as the inclusion of h4 and h6 could allow some vague chances on the kingside. What Magnus did is fine too, of course.}) 19. h4 Bd7 20. Ne5 Be8 {Now, I was somewhat surprised White did not take on c6.} 21. Qe3 {This is a solid and reasonable move, though I certainly would have tried something else.} (21. Bxc6 $5 Bxc6 22. g4 $5 {The machine is totally unimpressed with this idea, and claims Black is just better. But in human terms, this feels very scary. g4-g5 is not messing around and all of Black's pieces are on the queenside—I would be worried about getting mated. When I was following the game without the computer, I thought this could be very powerful. It would be interesting to know if Nepo saw this option and (correctly) chose to reject it—or if it did not occur to him.} 22... Nd7 $1 {Not an easy decision as this seems to just be begging for Nxf7.} 23. Nxf7 $1 {Let the fun begin!} (23. Nxc6 bxc6 24. g5 hxg5 25. hxg5 Nf8 $1 {Black prevents g6, and once his knight sits on g6, any queen and rook lift to the h-file doesn't do much either.}) 23... Rf8 $1 {This is a very tough move.} (23... Kxf7 24. Qxe6+ Kf8 25. d5 Ba4 26. Re3 {Apparently, Black is fine here. I would be terrified.}) 24. Nxh6+ gxh6 25. Qxe6+ Kh7 {The machine claims Black is better here, but it looks very unclear to me, and it is hard to get here in the first place.}) 21... Qb4 $1 {A high-class move. As soon as White's queen no longer defends a2, this move is possible without allowing Rad1. Furthermore, it is prophylaxis against the plan of Qe3-f4 and g4-g5.} 22. Reb1 (22. Qf4 {This looks scary, but after} 22... Rxa2 $1 {it's all over already.}) 22... Nxe5 $1 {I was surprised to see this move—it felt a little inhuman, but it is also best.} 23. dxe5 Ng4 $1 {It takes some guts to play this move since the knight is nearly trapped, but it is correct.} 24. Qe1 (24. Qf4 $2 h5 $1 {The knight can escape to h6. After} 25. Bf3 Qc3 $1 {Black's pieces are plenty active, and White can't win a pawn so easily.}) 24... Qxe1+ 25. Rxe1 h5 26. Bxb7 Ra4 27. c5 $4 {I have a bit of sympathy for this decision, but I still have to give it two question marks. I suspect what happened is that Nepo saw the idea of c6, realized it is not a big deal because the bishop is easily defended by Nc5, and then sort of forgot about it. Once c4-c5 comes though, the c5-square is no longer available, and the bishop is straight up lost. [During the press conference, Nepo admitted he missed the idea of ...c6 entirely. He mentioned that ...c6 is easy to miss because it is never possible while the white pawn is on c4 because White would have Nc5 to defend the bishop.]} (27. f3 {This should be preferred, but after} 27... Nh6 28. Be4 Nf5 {White will not keep his extra pawn, and a draw looks super likely. Still, this is obviously better than what actually happened.}) 27... c6 $19 {I have to give Nepo a little credit; he forced Magnus to find some only-moves later on, but they were all routine enough.} 28. f3 Nh6 29. Re4 Ra7 30. Rb4 Rb8 31. a4 Raxb7 32. Rb6 $1 {a4-a5-a6 is coming.} 32... Rxb6 {This is the only move, but hardly rocket science.} 33. cxb6 Rxb6 34. Nc5 {White gets the c5-square and the a-pawn is coming, but Magnus still has it under control.} 34... Nf5 35. a5 Rb8 36. a6 Nxg3 $1 {White will not be able to force the pawn through without moving the knight off of c5. Once this happens, c6-c5 comes and the bishop gets to c6. White can win a piece back but will be down several pawns and still have no hope.} 37. Na4 c5 $1 {The bishop gets to c6 and that is the end of that.} 38. a7 Rd8 $1 {The last important move, and it is all over.} 39. Nxc5 (39. Rb1 {This would have been more challenging, inviting Black to play Bc6, but I'd be beyond shocked if Magnus did not play it right.} 39... Ra8 $1 (39... Bc6 $2 {I suppose I could see a human messing this up.} 40. Rb8 Rf8 41. Nxc5 $1 {Black cannot prevent Nd7 and the tables have turned.}) 40. Rb8 Rxa7 41. Rxe8+ Kh7 42. Nxc5 Nf5 {White got his piece back, but is obviously done for.}) 39... Ra8 {Nothing more to say here.} 0-1 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.08"] [Round "10"] [White "Carlsen, Magnus"] [Black "Nepomniachtchi, Ian"] [Result "1/2-1/2"] [ECO "C42"] [WhiteElo "2856"] [BlackElo "2782"] [PlyCount "81"] [EventDate "2021.??.??"] [SourceVersionDate "2021.12.08"] 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3 Nxe4 5. Qe2 Qe7 6. Nf4 Nf6 7. d4 Nc6 8. c3 d5 9. Nd2 Nd8 10. Nf3 Qxe2+ 11. Bxe2 Bd6 12. O-O O-O 13. Bd3 Re8 14. Re1 Rxe1+ 15. Nxe1 Ne6 16. Nxe6 Bxe6 17. g3 g6 18. Ng2 Re8 19. f3 Nh5 20. Kf2 c6 21. g4 Ng7 22. Bf4 Bxf4 23. Nxf4 g5 24. Ne2 f5 25. h3 Kf7 26. Rh1 h6 27. f4 fxg4 28. hxg4 Bxg4 29. Rxh6 Bf5 30. Bxf5 Nxf5 31. Rh7+ Ng7 32. fxg5 Kg6 33. Rh3 Kxg5 34. Rg3+ Kf6 35. Rf3+ Ke7 36. Nf4 Kd6 37. Ng6 Re6 38. Ne5 Ne8 39. Rf7 Rf6+ 40. Rxf6+ Nxf6 41. Ke3 1/2-1/2 [Event "FIDE World Chess Championship 2021"] [Site "?"] [Date "2021.12.10"] [Round "11"] [White "Nepomniachtchi, Ian"] [Black "Carlsen, Magnus"] [Result "0-1"] [ECO "C54"] [WhiteElo "2782"] [BlackElo "2856"] [PlyCount "98"] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. O-O a5 7. Re1 Ba7 8. Na3 h6 9. Nc2 O-O 10. Be3 Bxe3 11. Nxe3 Re8 12. a4 Be6 13. Bxe6 Rxe6 14. Qb3 b6 15. Rad1 Ne7 16. h3 Qd7 17. Nh2 Rd8 18. Nhg4 Nxg4 19. hxg4 d5 20. d4 exd4 21. exd5 Re4 22. Qc2 Rf4 23. g3 dxe3 24. gxf4 Qxg4+ 25. Kh1 Qh3+ 26. Kg1 Nf5 27. d6 Nh4 28. fxe3 Qg3+ 29. Kf1 Nf3 30. Qf2 Qh3+ 31. Qg2 Qxg2+ 32. Kxg2 Nxe1+ 33. Rxe1 Rxd6 34. Kf3 Rd2 35. Rb1 g6 36. b4 axb4 37. Rxb4 Ra2 38. Ke4 h5 39. Kd5 Rc2 40. Rb3 h4 41. Kc6 h3 42. Kxc7 h2 43. Rb1 Rxc3+ 44. Kxb6 Rb3+ 45. Rxb3 h1=Q 46. a5 Qe4 47. Ka7 Qe7+ 48. Ka8 Kg7 49. Rb6 Qc5 0-1 ` })32:T15ac,33:T13dd,stat = { const stat = { die: { p: new Array(64).fill(0), n: new Array(64).fill(0), b: new Array(64).fill(0), r: new Array(64).fill(0), q: new Array(64).fill(0), k: new Array(64).fill(0) }, kill: { p: new Array(64).fill(0), n: new Array(64).fill(0), b: new Array(64).fill(0), r: new Array(64).fill(0), q: new Array(64).fill(0), k: new Array(64).fill(0) }, fm: new Array(64).fill(0), steps: new Array(64).fill(0), prom: new Array(64).fill(0), wwin: 0, bwin: 0, draw: 0, noend: 0, checks: 0, mates: 0, pats: 0, promo: { q: 0, r: 0, n: 0, b: 0 }, promotions: 0, enpass: 0, open: {}, openfull: {}, book: 0, bookName: "", moveMin: 1000, moveMax: 0, moves: 0, games: db.gameCount(), end: {}, pawns: {} }; for (let j = 0; j < db.gameCount(); j++) { const game = db.game(j); let name = ""; switch (game.result()) { case "1-0": stat.wwin++; break; case "0-1": stat.bwin++; break; case "1/2-1/2": stat.draw++; break; case "*": stat.noend++; break; } let book = 0; const mainVariation = game.mainVariation(); if (mainVariation.nodes()[0]) { const md = mainVariation.nodes()[0]._info.moveDescriptor; const fc = kokopu.squareToCoordinates(md.to()); const fi = inline(fc); stat.fm[fi]++; } if (mainVariation.nodes()[1]) { const md = mainVariation.nodes()[1]._info.moveDescriptor; const fc = kokopu.squareToCoordinates(md.to()); const fi = inline(fc); stat.fm[fi]++; } let moves = 0; const eg = {}; const pf = {}; mainVariation.nodes().forEach(function (node) { const md = node._info.moveDescriptor; const pos = node.position(); const fen = pos.fen(); const cmn = fen2cmn(fen); endgames.forEach((egame) => { if (egame[1].test(cmn)) { eg[egame[2]] = (eg[egame[2]] || 0) + 1; } }); pawnsStructures.forEach((pawns) => { if (fensAlike(fen, pawns[1]) && pwn2PWN(fen) == pawns[2]) { pf[pawns[0]] = (pf[pawns[0]] || 0) + 1; } }); const oName = open[fen]; moves = node.fullMoveNumber(); if (oName) { name = oName; book = moves; } const coord = kokopu.squareToCoordinates(md.to()); const i = inline(coord); stat.steps[i]++; if (md.isCapture()) { stat.die[md.capturedPiece()][i]++; stat.kill[md.movingPiece()][i]++; if (md.isEnPassant()) { stat.enpass++; } } if (md.isPromotion()) { const p = md.promotion(); stat.prom[i]++; stat.promo[p]++; stat.promotions++; } if (pos.isStalemate()) { stat.pats++; } if (pos.isCheck()) { stat.checks++; } if (pos.isCheckmate()) { stat.mates++; const king = pos.kingSquare(kokopu.oppositeColor(md.color())); const kingCoord = kokopu.squareToCoordinates(king); const k = inline(kingCoord); stat.die.k[k]++; stat.kill[md.movingPiece()][k]++; } }); const resIndex = { "1-0": 0, "0-1": 1, "1/2-1/2": 2 }[game.result()]; if (Object.keys(eg).length) { const end = Object.keys(eg) .map((key) => [key, eg[key]]) .sort((a, b) => b[1] - a[1])[0][0]; stat.end[end] = stat.end[end] || [0, 0, 0, 0]; stat.end[end][resIndex]++; stat.end[end][3]++; } if (Object.keys(pf).length) { const pwn = Object.keys(pf) .map((key) => [key, pf[key]]) .sort((a, b) => b[1] - a[1])[0][0]; stat.pawns[pwn] = stat.pawns[pwn] || [0, 0, 0, 0]; stat.pawns[pwn][resIndex]++; stat.pawns[pwn][3]++; } stat.moves += moves; stat.moveMin = Math.min(stat.moveMin, moves); stat.moveMax = Math.max(stat.moveMax, moves); if (name) { const name2 = name.split(", ")[0]; stat.open[name2] = stat.open[name2] || [0, 0, 0]; stat.open[name2][resIndex]++; stat.openfull[name] = (stat.openfull[name] || 0) + 1; } if (book > stat.book) { stat.book = book; stat.bookName = name; } } const openings = stat.open; stat.open = Object.keys(openings) .sort() .map((name) => [ name, [ ...openings[name], openings[name][0] + openings[name][1] + openings[name][2] ] ]); stat.openfull = Object.keys(stat.openfull) .sort() .map((name) => [name, stat.openfull[name]]); const open2 = [...stat.open]; open2.sort((a, b) => b[1][3] - a[1][3]); stat.open10 = open2.slice(0, 10); stat.endgames10 = Object.keys(stat.end) .map((key) => [key, stat.end[key]]) .sort((a, b) => b[1][3] - a[1][3]) .slice(0, 10); stat.pawns10 = Object.keys(stat.pawns) .map((key) => [key, stat.pawns[key]]) .sort((a, b) => b[1][3] - a[1][3]) .slice(0, 10); return stat; }34:T117b,titlepath = 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= (x, y, data) => { const getX = (i) => i % 8; const getY = (i) => (i - (i % 8)) / 8; if (!data) { return svg`${new Array( 64 ) .fill(0) .map( (_, i) => svg`` )}`; } const max = Math.max(...data); if (!max) { return ""; } return svg`${data.map( (c, i) => svg`${getRandomGrid(20, 20, 1, Math.round((c / max) * 200), i).map( (dot) => svg`` )}` // svg`` )}`; }36:Tbe0,endgames = [ [ "Queen, Rook & minor piece vs Queen, Rook & minor piece", /^(KQ[NBb]RP*KQ[NBb]RP*)$/, "♛♜[♝♞]-♛♜[♝♞]" ], [ "Two Rooks & minor piece vs two Rooks & minor piece", /^(K[NBb]RRP*K[NBb]RRP*)$/, "♜♜[♝♞]-♜♜[♝♞]" ], [ "Queen & minor piece vs Queen & minor piece", /^(KQ[NBb]P*KQ[NBb]P*)$/, "♛[♝♞]-♛[♝♞]" ], ["Rook vs Rook", /^KRP*KRP*$/, "♜-♜"], ["Rook & Bishop vs Rook & Knight", /^(KRBP*KRNP*|KRNP*KRBP*)$/i, "♜♝-♜♞"], ["Two Rooks vs Two Rooks", /^KRRP*KRRP*$/i, "♜♜-♜♜"], [ "Rook & Bishop vs Rook & Bishop (same color)", /^(KBRP*KBRP*|KbRP*KbRP*)$/, "♜♝-♜♝" ], ["Bishop vs Knight", /^(KBP*KNP*|KNP*KBP*)$/i, "♝-♞"], ["Rook & Knight vs Rook & Knight", /^KNRP*KNRP*$/, "♜♞-♜♞"], ["King & Pawns vs King (& Pawns)", /^(KP{2,}KP*|KP*KP{2,})$/, "♚♟(♟)-♚(♟)"], [ "Rook & Bishop vs Rook & Bishop (opposite color)", /^(KBRP*KbRP*|KbRP*KBRP*)$/, "♜♝-♜♗" ], ["Queen vs Queen", /^KQP*KQP*$/, "♛-♛"], ["Rook & Bishop vs Rook", /^(KBRP*KRP*|KRP*KBRP*)$/i, "♜♝-♜"], ["Bishop vs Bishop (same color)", /^(KBP*KBP*|KbP*KbP*)$/, "♝-♝"], ["Knight vs Knight", /^KNP*KNP*$/, "♞-♞"], ["Rook vs Bishop", /^(KRP*KBP*|KBP*KRP*)$/i, "♜-♝"], ["Rook & Knight vs Rook", /^(KNRP*KRP*|KRP*KNRP*)$/, "♜♞-♜"], ["Bishop vs Bishop (opposite color)", /^(KBP*KbP*|KbP*KBP*)$/, "♝-♗"], ["Bishop vs Pawns", /^(KBP*KP+|KP+KBP*)$/i, "♝-♟"], ["Rook vs Knight (rare)", /^(KRP*KNP*|KNP*KRP*)$/, "♜-♞"], ["Knight vs Pawns (rare)", /^(KNP*KP+|KP+KNP*)$/, "♞-♟"], [ "Queen & minor piece vs Queen (rare)", /^(KQ[NBb]P*KQP*|KQP*KQ[NBb]P*)$/, "♛[♝♞]-♛" ], [ "Rook vs two minor pieces (rare)", /^(KRP*K[NBb][NBb]P*|K[NBb][NBb]P*KRP*)$/, "♜-2[♝♞]" ], ["Rook vs Pawns (rare)", /^(KRP*KP+|KP+KRP*)$/, "♜-♟"], [ "Queen vs Rook & minor piece (rare)", /^(KQP*K[NBb]RP*|K[NBb]RP*KQP*)$/, "♛-♜[♝♞]" ], ["Rook & Pawn vs Rook (& no pawns) (rare)", /^(KRPKR|KRKRP)$/, "♜♟-♜"], [ "Rook & two Pawns vs Rook ( & no pawns) (rare)", /^(KRPPKR|KRKRPP)$/, "♜♟♟-♜" ], ["Queen vs Pawns (rare)", /^(KQP*KP+|KP+KQP*)$/, "♛-♟"], ["Queen vs Rook (rare)", /^(KQP*KRP+|KRP+KQP*)$/, "♛-♜"], ["Queen vs Two Rooks (rare)", /^(KQP*KRRP+|KRRP+KQP*)$/, "♛-♜♜"], ["King & One Pawn vs King (rare)", /^(KPK|KKP)$/, "♚♟-♚"], ["Queen vs minor piece (rare)", /^(KQP*K[NBb]P*|K[NBb]P*KQP*)$/, "♛-[♝♞]"], ["Queen & one Pawn vs Queen (very rare)", /^(KQPKQ|KQKQP)$/, "♛♟-♛"], [ "Queen vs two minor pieces (very rare)", /^(KQP*K[NBb][NBb]P*|K[NBb][NBb]P*KQP*)$/, "♛-2[♝♞]" ], ["Bishop & Knight vs King (very rare)", /^(KBNP*KP*|KP*KBNP*)$/i, "♝♞-♚"], [ "Queen vs three minor pieces (very rare)", /^(KQP*K[NBb][NBb][NBb]P*|K[NBb][NBb][NBb]P*KQP*)$/, "♛-3[♝♞]" ] ]37:T73f,pawnsStructures = [ ["Caro formation", "8/8/2p1p3/8/3P4/8/8/8", "11/11/11/01/10/11/11/11"], ["Slav formation", "8/8/2p1p3/8/3P4/8/8/8", "11/11/10/01/11/11/11/11"], ["Sicilian – Scheveningen", "8/8/3pp3/8/8/8/8/8", "11/11/01/10/11/11/11/11"], ["Sicilian – Dragon", "8/5p1p/3p2p1/8/8/8/8/8", "11/11/01/10/11/11/11/11"], [ "Sicilian – Boleslavsky hole", "8/8/3p4/4p3/4P3/8/8/8", "11/11/01/10/11/11/11/11" ], ["Maróczy Bind", "8/8/3p4/8/2P1P3/8/8/8", "11/11/01/10/11/11/11/11"], ["Hedgehog", "8/8/pp1pp3/8/8/8/8/8", "11/11/01/10/11/11/11/11"], ["Rauzer formation", "8/8/8/4p3/2P1P3/8/8/8", "11/11/11/00/11/11/11/11"], ["Boleslavsky Wall", "8/8/2pp4/8/2P1P3/8/8/8", "11/11/11/10/01/11/11/11"], ["d5 chain", "8/8/3p4/3Pp3/4P3/8/8/8", "11/11/11/11/11/11/11/11"], ["e5 chain", "8/8/4p3/3pP3/3P4/8/8/8", "11/11/11/11/11/11/11/11"], [ "Modern Benoni formation", "8/8/3p4/2pP4/4P3/8/8/8", "11/11/10/11/01/11/11/11" ], [ "Giuoco Piano – Isolani formation", "8/8/8/8/3P4/8/8/8", "11/11/10/01/00/11/11/11" ], [ "Queen’s Gambit – Isolani formation", "8/8/4p3/8/3P4/8/8/8", "11/11/10/01/10/11/11/11" ], [ "Queen’s Gambit – Orthodox Excange", "8/1p6/2p5/3p4/3P4/4P3/5P2/8", "11/11/10/11/01/11/11/11" ], ["Hanging pawns", "8/8/8/8/2PP4/8/8/8", "11/10/11/01/10/11/11/11"], [ "Carlsbad formation", "8/1p6/2p5/3p4/3P4/4P3/5P2/8", "11/11/10/11/01/11/11/11" ], ["Panov formation", "8/8/4p3/2Pp4/3P4/8/8/8", "11/11/01/11/10/11/11/11"], [ "Stonewall formation", "8/8/4p3/3p1p2/3P1P2/4P3/8/8", "11/11/11/11/11/11/11/11" ], [ "Botvinnik system", "8/8/3p4/2p1p3/2P1P3/3P4/8/8", "11/11/11/11/11/11/11/11" ], [ "Closed Sicilian formation", "8/4p3/3p4/2p5/4P3/3P4/2P5/8", "11/11/11/11/11/11/11/11" ] 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Statistics","pinned":false,"hidden":false,"mode":"md"},{"id":54,"value":"$31","pinned":false,"hidden":false,"mode":"ojs"},{"id":594,"value":"---","pinned":false,"hidden":false,"mode":"md"},{"id":472,"value":"$32","pinned":false,"hidden":false,"mode":"html"},{"id":60,"value":"$33","pinned":false,"hidden":false,"mode":"ojs"},{"id":502,"value":"$34","pinned":false,"hidden":false,"mode":"ojs"},{"id":468,"value":"$35","pinned":false,"hidden":false,"mode":"ojs"},{"id":168,"value":"statStepsMax = Math.max(...stat.steps)","pinned":false,"hidden":false,"mode":"ojs"},{"id":179,"value":"statDieMax = {\n return {\n p: Math.max(...stat.die.p),\n n: Math.max(...stat.die.n),\n b: Math.max(...stat.die.b),\n r: Math.max(...stat.die.r),\n q: Math.max(...stat.die.q),\n k: Math.max(...stat.die.k)\n };\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":192,"value":"statKillMax = {\n return {\n p: Math.max(...stat.kill.p),\n n: Math.max(...stat.kill.n),\n b: Math.max(...stat.kill.b),\n r: 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pwnres.join(\"/\");\n}","pinned":false,"hidden":false,"mode":"ojs"},{"id":367,"value":"$37","pinned":false,"hidden":false,"mode":"ojs"},{"id":509,"value":"import { getRandomGrid } from \"@dmitrybaranovskiy/random-grid\";","pinned":false,"hidden":false,"mode":"ojs"},{"id":548,"value":"import { makeDots } from \"@dmitrybaranovskiy/chess-dots\"","pinned":false,"hidden":false,"mode":"ojs"},{"id":686,"value":"bnurl = FileAttachment(\"bn.svg\").url()","pinned":false,"hidden":false,"mode":"ojs"},{"id":687,"value":"bburl = FileAttachment(\"bb.svg\").url()","pinned":false,"hidden":false,"mode":"ojs"},{"id":688,"value":"bkurl = FileAttachment(\"bk.svg\").url()","pinned":false,"hidden":false,"mode":"ojs"},{"id":689,"value":"bqurl = FileAttachment(\"bq.svg\").url()","pinned":false,"hidden":false,"mode":"ojs"},{"id":690,"value":"brurl = FileAttachment(\"br.svg\").url()","pinned":false,"hidden":false,"mode":"ojs"},{"id":678,"value":"bpurl = 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