[Comment "auto-generated from http://www.jesseo.com/chesspublishing/pgn.php?pgndata=[Event%20%26quot;corr%26quot;]%0A[Site%20%26quot;?%26quot;]%0A[Date%20%26quot;1962.??.??%26quot;]%0A[Round%20%26quot;?%26quot;]%0A[White%20%26quot;Vooremaa,%20A.%26quot;]%0A[Black%20%26quot;Kostin%26quot;]%0A[Result%20%26quot;1-0%26quot;]%0A[ECO%20%26quot;B01%26quot;]%0A[PlyCount%20%26quot;123%26quot;]%0A[EventDate%20%26quot;2017.07.25%26quot;]%0A%0A1.%20e4%20d5%202.%20exd5%20Nf6%203.%20d4%20Nxd5%204.%20c4%20Nb4%205.%20a3%20N4a6%206.%20Nf3%20g6%207.%20Nc3%20Bg7%208.%0ABe2%20O-O%209.%20O-O%20(9.%20Bg5%20Nc6%20$1%2010.%20d5%20Bxc3+%2011.%20bxc3%20Na5%20%26%23123;seems%20acceptable%20for%0ABlack,%20and%20if%20instead%2010.Be3%20e5,%20Black%20at%20least%20has%20won%20a%20tempo.%26%23125;)%209...%20c5%2010.%0Ad5%20(10.%20Be3%20%26%23123;is%20another%20critical%20variation.%20The%20reply%2010...Nd7%20then%20fails%20to%0A11.Qe1.%20Perhaps%20best:%2010...Bg4,%20to%20provoke%2011.d5.%26%23125;)%2010...%20e5%2011.%20Rb1%20(%26%23123;%0AThe%20Stockfish%208%20engine%20has%20little%20sympathy%20for%20Black%27s%20pawn%20structure.%20It%20is%0Ainclined%20to%20sacrifice%20a%20piece%20and%20shatter%20Black%27s%20pawn%20chain.%20I%20had%20to%20learn%0Apainful%20lessons%20when%20studying%20the%20Vulture.%20Yet%20we%20shouldn%27t%20trust%20the%20engines%0Ablindly.%20In%20this%20concrete%20case%20the%20%26quot;plusminus%26quot;%20warning%20may%20be%20exaggerated:%26%23125;%2011.%20Bg5%0Af6%2012.%20Bh4%20g5%2013.%20Bg3%20Nd7%2014.%20Bd3%20f5%2015.%20h3%20e4%2016.%20Nxe4%20%26%23123;%0Athe%20sacrifice,%20as%20announced%26%23125;%2016...%20fxe4%2017.%20Bxe4%20Nf6%2018.%20Bc2%20g4%2019.%20hxg4%20Bxg4%0A20.%20Qd3%20Qe8%2021.%20Bd6%20(21.%20Rae1%20Qh5%2022.%20Ne5%20Rae8%2023.%20Ba4%20Rd8%2024.%20Nxg4%20Qxg4%2025.%0ARe7%20Nh5%2026.%20Bc2%20Qg6%2027.%20Qxg6%20hxg6%2028.%20Bh4%20Bf6%2029.%20Bxf6%20Rxf6%2030.%20Rxb7%20Rb8%2031.%0ARxa7%20Rxb2%2032.%20Ba4%20Nf4%20$11)%2021...%20Qh5%2022.%20Bxf8%20Bxf8%2023.%20Nh2%20Bd6%2024.%20f4%20Be2%2025.%0AQg3+%20Kf7%2026.%20Nf3%20Rg8%2027.%20Ng5+%20Kf8%2028.%20Bd1%20Rxg5%2029.%20Qxg5%20Qxg5%2030.%20fxg5%20Bxf1%2031.%0AKxf1%20Ne4%2032.%20Ke2%20Nxg5%2033.%20Ke3%20Be5%2034.%20Bh5%20Ke7%2035.%20Re1%20Nc7%2036.%20b3%20Bg3%2037.%20Rb1%20h6%0A$11)%2011...%20h6%20(%26%23123;It%20isn%27t%20clear%20whether%20alternatives%20are%20better:%26%23125;%2011...%20Re8%20$5%0A12.%20Ne1%20Nd7%2013.%20f3%20Nc7%2014.%20Be3%20f5%2015.%20Qd2%20b6%2016.%20Rd1%20Qf6)%20(11...%20Nd7%20$5%2012.%20g4%0ANc7%2013.%20Ng5%20h6%2014.%20Nge4%20Ne8%2015.%20g5%20hxg5%2016.%20d6%20f6%2017.%20b4%20Rf7%2018.%20Nd5%20Nf8%2019.%0Abxc5%20Ne6)%2012.%20Ne1%20f5%2013.%20f4%20$16%20%26%23123;This%20verdict%20+/-%20is%20the%20only%20comment%20from%20the%0Asource%20(MegaCorr3%20CD).%20It%20seems%20too%20harsh.%26%23125;%20(13.%20f3)%2013...%20e4%2014.%20Be3%20Bxc3%2015.%0Abxc3%20Nd7%2016.%20Nc2%20(16.%20g4%20Nc7%2017.%20Ng2%20Ne8%2018.%20gxf5%20gxf5%2019.%20Kh1%20Kh7%2020.%20Bf2%20b6%0A21.%20a4%20$14)%2016...%20Nb6%20(%26%23123;%0ABy%20keeping%20c4%20under%20attack%20Black%20reduces%20the%20danger%20of%20g2-g4.%26%23125;%2016...%20Nc7%2017.%20g4%0A)%2017.%20Kh1%20Bd7%2018.%20Qd2%20Ba4%20(18...%20h5)%2019.%20Bf2%20Bxc2%2020.%20Qxc2%20Kh7%20(20...%20h5%2021.%20h3%0AQc7%2022.%20g3%20Nc8%2023.%20Kg2%20Nd6%20$11)%2021.%20Be3%20Qc7%2022.%20a4%20$2%20(22.%20g4%20$1%20Nc8%2023.%20h4%20Nd6%0A24.%20h5%20gxh5%2025.%20g5%20Rh8%2026.%20Rf2%20h4%2027.%20Rg1%20Rag8%2028.%20Qc1%20Qe7%2029.%20Qf1%20Kg7%2030.%20Qh3%0AKf8%2031.%20Rfg2%20$16)%2022...%20Nc8%2023.%20g4%20Nd6%2024.%20g5%20$11%20(24.%20Rg1)%2024...%20h5%2025.%20Rb2%0ANb8%2026.%20Rfb1%20Nd7%2027.%20Qd1%20Kg7%2028.%20Ra2%20Qa5%2029.%20Qb3%20Rfc8%2030.%20Kg2%20Rc7%2031.%20Kf2%20Nb6%0A32.%20Raa1%20Rd8%2033.%20Ra3%20Nbc8%2034.%20Rb2%20Rcd7%2035.%20Qa2%20b6%2036.%20h3%20Rc7%2037.%20h4%20Nb7%20$2%20(%0A37...%20Ne7%20$11)%2038.%20Rb5%20Qa6%2039.%20a5%20bxa5%2040.%20Qb2%20$2%20(40.%20Rxb7%20$16)%2040...%20Rd6%20$2%20(%0A40...%20Nb6%20$11)%2041.%20Bxc5%20Rxc5%2042.%20Rxb7+%20Kg8%2043.%20Rb8%20$2%20(43.%20Rab3%20$18)%2043...%20Rb6%0A44.%20Rb3%20a4%20$2%20(44...%20Kf7%2045.%20Qa3%20Rxb8%2046.%20Rxb8%20Qd6%2047.%20Rb7+%20Kf8%2048.%20Ke3%20Nb6%2049.%0ARxa7%20Rxd5%2050.%20Rxa5%20Qxa3%2051.%20Rxa3%20Rd7%2052.%20Ra5%20Rc7%2053.%20Kd4%20Kf7%2054.%20Rb5%20Rd7+%2055.%0AKe3%20Na4%2056.%20c5%20Nxc3%2057.%20c6%20Rc7%2058.%20Bc4+%20Kf8%2059.%20Rb8+%20Ke7%2060.%20Kd4%20$18)%2045.%20R3xb6%0Aaxb6%2046.%20d6%20Qa7%2047.%20d7%20$2%20(47.%20Ra8%20$3%20Qb7%2048.%20Qd2%20Qd7%2049.%20Qd4%20a3%2050.%20Qf6%20a2%2051.%0AQxg6+%20Kf8%2052.%20Qf6+%20Kg8%2053.%20Bxh5%20a1%3DQ%2054.%20Rxa1%20Nxd6%2055.%20Rd1%20Rc6%2056.%20Be2%20$18)%0A47...%20Qxd7%2048.%20Qxb6%20Rc6%2049.%20Qd4%20Qc7%2050.%20Kg3%20$2%20(50.%20Ra8%20Kh7%2051.%20Kg2%20Qb7%2052.%0ARxa4%20Rd6%2053.%20Qc5%20Rd2%2054.%20Rb4%20Qg7%2055.%20Kf1%20Nd6%2056.%20Ra4%20Nb7%2057.%20Qb5%20Qe7%2058.%20Ra7%0ARd7%2059.%20Qe5%20Qg7%2060.%20Kg2%20Re7%2061.%20Qf6%20Qxf6%2062.%20gxf6%20Rd7%2063.%20Kf2%20Nc5%2064.%20Ra8%20Rf7%0A65.%20Rc8%20Ne6%2066.%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[Event "corr"]
[Site "?"]
[Date "1962.??.??"]
[Round "?"]
[White "Vooremaa, A."]
[Black "Kostin"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "123"]
[EventDate "2017.07.25"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4 5. a3 N4a6 6. Nf3 g6 7. Nc3 Bg7 8.
Be2 O-O 9. O-O (9. Bg5 Nc6 $1 10. d5 Bxc3+ 11. bxc3 Na5 {seems acceptable for
Black, and if instead 10.Be3 e5, Black at least has won a tempo.}) 9... c5 10.
d5 (10. Be3 {is another critical variation. The reply 10...Nd7 then fails to
11.Qe1. Perhaps best: 10...Bg4, to provoke 11.d5.}) 10... e5 11. Rb1 ({
The Stockfish 8 engine has little sympathy for Black's pawn structure. It is
inclined to sacrifice a piece and shatter Black's pawn chain. I had to learn
painful lessons when studying the Vulture. Yet we shouldn't trust the engines
blindly. In this concrete case the "plusminus" warning may be exaggerated:} 11. Bg5
f6 12. Bh4 g5 13. Bg3 Nd7 14. Bd3 f5 15. h3 e4 16. Nxe4 {
the sacrifice, as announced} 16... fxe4 17. Bxe4 Nf6 18. Bc2 g4 19. hxg4 Bxg4
20. Qd3 Qe8 21. Bd6 (21. Rae1 Qh5 22. Ne5 Rae8 23. Ba4 Rd8 24. Nxg4 Qxg4 25.
Re7 Nh5 26. Bc2 Qg6 27. Qxg6 hxg6 28. Bh4 Bf6 29. Bxf6 Rxf6 30. Rxb7 Rb8 31.
Rxa7 Rxb2 32. Ba4 Nf4 $11) 21... Qh5 22. Bxf8 Bxf8 23. Nh2 Bd6 24. f4 Be2 25.
Qg3+ Kf7 26. Nf3 Rg8 27. Ng5+ Kf8 28. Bd1 Rxg5 29. Qxg5 Qxg5 30. fxg5 Bxf1 31.
Kxf1 Ne4 32. Ke2 Nxg5 33. Ke3 Be5 34. Bh5 Ke7 35. Re1 Nc7 36. b3 Bg3 37. Rb1 h6
$11) 11... h6 ({It isn't clear whether alternatives are better:} 11... Re8 $5
12. Ne1 Nd7 13. f3 Nc7 14. Be3 f5 15. Qd2 b6 16. Rd1 Qf6) (11... Nd7 $5 12. g4
Nc7 13. Ng5 h6 14. Nge4 Ne8 15. g5 hxg5 16. d6 f6 17. b4 Rf7 18. Nd5 Nf8 19.
bxc5 Ne6) 12. Ne1 f5 13. f4 $16 {This verdict +/- is the only comment from the
source (MegaCorr3 CD). It seems too harsh.} (13. f3) 13... e4 14. Be3 Bxc3 15.
bxc3 Nd7 16. Nc2 (16. g4 Nc7 17. Ng2 Ne8 18. gxf5 gxf5 19. Kh1 Kh7 20. Bf2 b6
21. a4 $14) 16... Nb6 ({
By keeping c4 under attack Black reduces the danger of g2-g4.} 16... Nc7 17. g4
) 17. Kh1 Bd7 18. Qd2 Ba4 (18... h5) 19. Bf2 Bxc2 20. Qxc2 Kh7 (20... h5 21. h3
Qc7 22. g3 Nc8 23. Kg2 Nd6 $11) 21. Be3 Qc7 22. a4 $2 (22. g4 $1 Nc8 23. h4 Nd6
24. h5 gxh5 25. g5 Rh8 26. Rf2 h4 27. Rg1 Rag8 28. Qc1 Qe7 29. Qf1 Kg7 30. Qh3
Kf8 31. Rfg2 $16) 22... Nc8 23. g4 Nd6 24. g5 $11 (24. Rg1) 24... h5 25. Rb2
Nb8 26. Rfb1 Nd7 27. Qd1 Kg7 28. Ra2 Qa5 29. Qb3 Rfc8 30. Kg2 Rc7 31. Kf2 Nb6
32. Raa1 Rd8 33. Ra3 Nbc8 34. Rb2 Rcd7 35. Qa2 b6 36. h3 Rc7 37. h4 Nb7 $2 (
37... Ne7 $11) 38. Rb5 Qa6 39. a5 bxa5 40. Qb2 $2 (40. Rxb7 $16) 40... Rd6 $2 (
40... Nb6 $11) 41. Bxc5 Rxc5 42. Rxb7+ Kg8 43. Rb8 $2 (43. Rab3 $18) 43... Rb6
44. Rb3 a4 $2 (44... Kf7 45. Qa3 Rxb8 46. Rxb8 Qd6 47. Rb7+ Kf8 48. Ke3 Nb6 49.
Rxa7 Rxd5 50. Rxa5 Qxa3 51. Rxa3 Rd7 52. Ra5 Rc7 53. Kd4 Kf7 54. Rb5 Rd7+ 55.
Ke3 Na4 56. c5 Nxc3 57. c6 Rc7 58. Bc4+ Kf8 59. Rb8+ Ke7 60. Kd4 $18) 45. R3xb6
axb6 46. d6 Qa7 47. d7 $2 (47. Ra8 $3 Qb7 48. Qd2 Qd7 49. Qd4 a3 50. Qf6 a2 51.
Qxg6+ Kf8 52. Qf6+ Kg8 53. Bxh5 a1=Q 54. Rxa1 Nxd6 55. Rd1 Rc6 56. Be2 $18)
47... Qxd7 48. Qxb6 Rc6 49. Qd4 Qc7 50. Kg3 $2 (50. Ra8 Kh7 51. Kg2 Qb7 52.
Rxa4 Rd6 53. Qc5 Rd2 54. Rb4 Qg7 55. Kf1 Nd6 56. Ra4 Nb7 57. Qb5 Qe7 58. Ra7
Rd7 59. Qe5 Qg7 60. Kg2 Re7 61. Qf6 Qxf6 62. gxf6 Rd7 63. Kf2 Nc5 64. Ra8 Rf7
65. Rc8 Ne6 66. c5 $18) 50... Kf7 $2 (50... Qxb8 $11 51. Qd5+ Kg7 52. Qxc6 Nd6
53. c5 (53. Qxa4 Qb6 54. Qd7+ Kh8 55. Kg2 Qe3 $11) 53... Qb1 54. Kf2 e3+ (54...
Nf7 $11)) 51. c5 Rxc5 52. Qf6+ Kg8 53. Qxg6+ Kf8 54. Qf6+ Kg8 55. Qe6+ $2 (55.
g6 Qa7 56. Kg2 Qd7 57. Kh3 a3 58. Bb5 Qd5 59. g7 Kh7 60. Be2 Qd7 61. Qf8 Rxc3+
62. Kh2 Qxg7 63. Qxf5+ Kg8 64. Rxc8+ Rxc8 65. Qxc8+ Kh7 66. Qf5+ Qg6 67. Qd5
$18) 55... Kf8 $2 (55... Kg7 56. Qh6+ Kg8 57. Rb4 Rxc3+ 58. Kg2 Rc2 59. Qxh5
Kg7 60. Qh6+ Kg8 61. Qe6+ Kh8 62. Qf6+ Kg8 63. Rd4 Ne7 64. Qe6+ Kf8 65. g6
Rxe2+ 66. Kf1 Qxf4+ 67. Kxe2 Qf3+ 68. Kd2 Qf2+ 69. Kc1 Qe3+ 70. Rd2 Qc3+ 71.
Kb1 Qb3+ 72. Qxb3 axb3 73. Rd8+ Kg7 74. Rd7 Kf6 75. g7 Ng8 76. Kb2 f4 77. Kxb3
f3 78. Kc3 f2 79. Rd1 Kxg7 80. Kd4 Ne7 81. Kxe4 Ng6 $11) 56. g6 Rxc3+ 57. Kg2
Qe7 58. Qxf5+ Kg7 59. Qxh5 Qf6 60. Rb7+ Ne7 61. Qh7+ Kf8 62. Rxe7 1-0