[Comment "auto-generated from http://www.jesseo.com/chesspublishing/pgn.php?pgndata=1.%20e4%20c5%202.%20Nf3%20Nc6%203.%20Nc3%20g6%204.%20d4%20cxd4%205.%20Nxd4%20Bg7%206.%20Be3%20Nf6%207.%20Bc4%20O-O%208.%0ABb3%20d6%209.%20f3%20Qa5%2010.%20Qd2%20Nxd4%2011.%20Bxd4%20Be6%2012.%20O-O-O%20Rfc8%2013.%20Kb1%20Bxb3%2014.%20cxb3%0Ab5%2015.%20Rhe1%20%26%23123;(The%20rather%20unknown%20a3%20is%20also%20tough%20for%20black.)%26%23125;%20b4%2016.%20Bxf6%20bxc3%0A17.%20Bxc3%20Bxc3%2018.%20bxc3%20Rxc3%20%26%23123;(An%20interesting%20alternative%20for%20black%20is%20Qe5,%0Amentioned%20on%20chesspub.%20It%20probably%20gives%20still%20a%20slight%20pull%20for%20white%20but%20at%0Aleast%20avoids%20the%20dreadful%20endgame.)%26%23125;%2019.%20Re3%20Rac8%2020.%20Rxc3%20Qxc3%2021.%20Qxc3%20Rxc3%0A22.%20Rc1%20Rxc1+%2023.%20Kxc1%20Kf8%2024.%20Kc2%20Ke8%2025.%20Kc3%20Kd7%2026.%20Kc4%20Kc6%2027.%20b4%20Kb6%20$1%0A%0A(27...%20a6%20$2%2028.%20a4%20e6%20(28...%20g5%2029.%20b5+%20axb5+%2030.%20axb5+%20Kb6%2031.%20g3%20h5%2032.%20h4%20gxh4%0A33.%20gxh4%20Kb7%2034.%20Kb3%20Kc7%2035.%20Kb4%20Kb6%2036.%20Ka4%20e6%2037.%20Kb4%20Kb7%2038.%20Ka5%20d5%2039.%20exd5%0Aexd5%2040.%20Ka4%20Kc7%2041.%20Kb3%20Kb6%2042.%20Kb4%20f6%2043.%20Ka4%20f5%2044.%20Kb4%20f4%2045.%20Ka4%20$18)%2029.%20h4%20h6%20(29...%20f6%2030.%20g4%20g5%2031.%20b5+%20axb5+%2032.%20axb5+%20Kb6%2033.%20hxg5%20fxg5%2034.Kb4%20Kc7%20%0A%0A35.%20Ka5%20Kb7%2036.%20b6%20Kb8%2037.%20Ka6%20h6%2038.%20Kb5%20Kb7%2039.%20Ka5%20Kc8%2040.%20Kb4%20Kb8%2041.%20Ka4%20Kc8%2042.%20Ka5%20Kb8%2043.%20Ka6%20$18)%2030.%20g4%20Kb6%2031.%20b5%20axb5+%20(31...%20a5%2032.%20f4%20Kc7%2033.%20%0A%0Af5%20Kb6%2034.%20f6%20g5%2035.%20h5%20Kb7%2036.%20e5%20d5+%2037.%20Kc5%20Kc7%2038.%20b6+%0AKb7%2039.%20Kd6%20d4%2040.%20Ke7%20d3%2041.%20Kxf7%20d2%2042.%20Kg7%20d1%3DQ%2043.%20f7%20Qxg4%2044.%20f8%3DQ%20$18%20%26%23123;%0AThis%20wins%20but%20still%20requires%20some%20good%20technique.%26%23125;)32.%20axb5%20Kb7%2033.%20Kb4%20Kb6%0A34.%20h5%20gxh5%20(34...%20g5%2035.%20Kc4%20f6%20%26%23123;(Obligatory%20as%20f4%20was%20threatening.)%26%23125;%2036.%20Kb4%0Ad5%2037.%20exd5%20exd5%2038.%20Ka4%20d4%2039.%20Kb4%20d3%2040.%20Kc3%20d2%2041.%20Kxd2%20Kxb5%2042.%20Kd3%20$18)%0A35.%20gxh5%20d5%2036.%20exd5%20exd5%2037.%20Ka4%20f6%2038.%20Kb4%20f5%2039.%20f4%20$18)%0A%0A(27...%20e6%20$2%2028.%20b5+%20Kb6%2029.%20Kb4%20h5%2030.%0Ag4%20hxg4%2031.%20fxg4%20g5%2032.%20h3%20f6%2033.%20a3%20Kc7%2034.%20Ka5%20d5%2035.%20exd5%20exd5%2036.%20Kb4%20d4%0A37.%20a4%20d3%2038.%20Kc3%20Kb6%2039.%20Kxd3%20Ka5%2040.%20Kc4%20Kxa4%2041.%20Kc5%20Ka5%2042.%20Kc6%20$18)%0A%0A28.%20h4%20$1%20%26%23123;(Keeping%20the%20pawn%20on%20a4%20gives%20white%20maximum%20chances%20to%20get%20black%20in%20zugzwang)%26%23125;%0A%0A(28.%20a4%20$2%20e6%2029.%20h4%20Kc6%2030.%20g4%20(30.%20b5+%20Kb6%2031.%20Kb4%20f6%20$1%20%26%23123;(Black%20has%20just%20sufficient%20pawnmoves.)%26%23125;%2032.%20h5%20(32.%20g3%20Kc7%2033.%20Ka5%20d5%2034.%20exd5%20exd5%2035.%20Kb4%20d4%20%0A%0A36.%20h5%20d3%2037.%20Kc3%20Kb6%2038.%20Kxd3%20Ka5%2039.%20h6%20Kxa4%2040.%20Kc4%20Ka5%2041.%20Kc5%20f5%2042.%20f4%20$11)%2032...%20Kc7%2033.%20Ka5%20d5%2034.%20exd5%20exd5%2035.%20Kb4%20d4%2036.%20Kc4%20Kb6%2037.%20h6%20d3%2038.%20%0A%0AKxd3%20Ka5%2039.%20f4%20Kxa4%2040.%20Kc4%20Ka5%2041.%20Kc5%20f5%2042.%20g3%20Ka4%2043.%20b6%20axb6+%2044.%20Kxb6%20$11%20%26%23123;(White%20can%20win%20the%20h-pawn%20but%20it%20is%20still%20a%20draw%20as%20black%20can%20lock%20up%20the%20%0A%0Aking%20with%20Kf7)%26%23125;)%2030...%20h6%2031.%20f4%20(31.%20h5%20gxh5%2032.%20gxh5%20Kb6%20$11%20%26%23123;(Still%20no%20a6%20due%20to%20b5.%20In%20this%20position%20black%20does%20not%20have%20to%20fear%20anymore%20the%20plan%20with%20%0A%0Af4-f5-f6%20due%20to%20the%20open%20g-file.)%26%23125;)%2031...%20a6%20$1%20%26%23123;(This%20move%20is%20not%20discussed%20by%20the%20Argentinian%20IM%20Luis%20Rodi%20Maletich%20neither%20in%20the%20comments%20of%20the%20%0Acorrespondence%20game%20Rittner%20-%20Arlind.)%26%23125;%2032.%20f5%20g5%2033.%20hxg5%20hxg5%2034.%20fxe6%20fxe6%2035.%20b5%252B%20axb5+%2036.%20axb5+%20Kb6%2037.%20Kb4%20Kb7%2038.%20Ka5%20Ka7%2039.%20b6+%20Kb7%2040.%20Kb5%20e5%20%0A%0A41.%20Ka5%20d5%2042.%20exd5%20e4%2043.%20d6%20e3%2044.%20d7%20e2%2045.%20d8%3DQ%20e1%3DQ+%2046.%20Kb5%20Qe8+%2047.%20Qxe8%20$11%20%26%23123;(This%20was%20the%20end%20of%20the%20game%20Bukavshin,%20Ivan%20-%20Belous,%20Vladimir%20played%20%0A%0Ain%202010.)%26%23125;)%0A%0A%0A28...%20e6%2029.%20g4%20$1%20h6%2030.%20f4%20$1%0A%0A(30.%20h5%20$2%20gxh5%2031.%20gxh5%20Ka6%20$1%20%26%23123;(Black%20still%20can%20not%20play%20a6%20due%20to%20the%20plan%20based%20on%20Kb3.)%26%23125;%2032.%20Kb3%20Kb5%2033.%20a3%20Kc6%2034.%20Ka4%20Kb6%2035.%20f4%20a6%2036.%20Kb3%20Kc6%2037.%20Kc4%20%0A%0AKb6%2038.%20a4%20Kc6%2039.%20b5+%20axb5+%2040.%20axb5+%20Kb6%2041.%20Kb4%20d5%2042.%20exd5%20exd5%20$11%20%26%23123;(With%20the%20pawn%20on%20f3%20it%20is%20won%20but%20not%20when%20the%20pawn%20stands%20on%20f4.)%26%23125;)%0A%0A30...%20a6%20$1%0A%0A(30...%20Ka6%20$2%2031.%20a4%20Kb6%2032.%20a5+%20Ka6%2033.%20f5%20$18)%0A%0A(30...%20h5%20$2%20%26%23123;(I%20had%20a%20long%20look%20at%20this%20possibility%20but%0AI%20believe%20after%20some%20adventures%20white%20wins%20anyway.)%26%23125;%2031.%20gxh5%20gxh5%2032.%20f5%20a6%0A33.%20a4%20Kc6%2034.%20Kd4%20Kb6%2035.%20Ke3%20Kc6%2036.%20Kf4%20d5%2037.%20Ke5%20dxe4%2038.%20Kxe4%20Kd6%2039.%20f6%0AKc6%2040.%20Ke5%20Kc7%2041.%20Kf4%20Kd6%2042.%20Kg5%20e5%2043.%20Kxh5%20Kd5%2044.%20b5%20axb5%2045.%20axb5%20e4%2046.%0Ab6%20e3%2047.%20b7%20e2%2048.%20b8%3DQ%20e1%3DQ%2049.%20Qa8+%20Kc5%2050.%20Qf8+%20Kc6%2051.%20Qxf7%20$18%20%26%23123;(And%20we%0Ahit%20the%20tablebases)%26%23125;)%0A%0A31.%20Kb3%20Kc6%20$1%0A%0A(31...%20Kb5%20$2%2032.%20h5%20gxh5%2033.%20gxh5%20Kc6%2034.Ka4%20Kb6%2035.%20a3%20Kc6%2036.%20Ka5%20d5%2037.%20exd5+%20exd5%2038.%20a4%20$18)%0A%0A%0A32.%20g5%20%26%23123;(Here%20white%20and%20black%20have%20to%20make%20a%20choice%20which%20queenendgame%20they%20want%20to%20play.%20It%20is%20unclear%0Ato%20me%20which%20path%20is%20exactly%20giving%20the%20best%20winning%20chances%20for%20white%20and%20the%20best%20drawing%20chances%0Afor%20black%20so%20I%20summarized%20the%20possibilities)%26%23125;%0A%0A(32.%20Ka4%20f6%2033.Ka5%20(33.%20g5%20fxg5%2034.%20fxg5%20h5%20(34...%20hxg5%2035.%20hxg5%20d5%2036.%20exd5+%20Kxd5%0A37.%20Ka5%20Kc4%2038.%20a3%20e5%2039.%20Kxa6%20e4%2040.%20b5%20e3%2041.%20b6%20e2%2042.%20b7%20e1%3DQ%2043.%20b8%3DQ%20$16)%0A35.%20Ka5%20d5%2036.%20exd5+%20exd5%20(36...%20Kxd5%2037.%20Kxa6%20e5%2038.%20b5%20e4%2039.%20b6%20e3%2040.%20b7%20e2%0A41.%20b8%3DQ%20e1%3DQ%20$16)%2037.%20Kxa6%20d4%2038.%20b5+%20Kc7%2039.%20Ka7%20d3%2040.%20b6+%20Kd7%2041.%20b7%20d2%2042.%20b8%3DQ%20d1%3DQ%20$16)%0A33...%20d5%2034.%20exd5+%20exd5%20(34...%20Kxd5%2035.%20Kxa6%20e5%2036.%20fxe5%20fxe5%2037.%20b5%20e4%2038.%20b6%20e3%0A39.%20b7%20e2%2040.%20b8%3DQ%20e1%3DQ%20$16)%2035.%20Kxa6%20d4%2036.%20b5+%20Kc7%2037.%20Ka7%20d3%2038.%20b6+%20Kd7%2039.%20b7%20d2%2040.%20b8%3DQ%20d1%3DQ%20$16)%0A%0A32...%20h5%20%0A%0A(32...%20hxg5%2033.%20hxg5%20Kb5%2034.%20Kc3%20Kb6%2035.%20Kb2%20Kc6%2036.%20Ka3%20Kb5%2037.%20Kb3%20Kc6%2038.%20Ka4%20Kb6%2039.%20a3%20Kc6%0A40.%20Ka5%20d5%2041.%20exd5+%20exd5%2042.%20Kxa6%20d4%2043.%20b5+%20Kc7%2044.%20Ka7%20d3%2045.%20b6+%20Kd7%2046.%20b7%20d2%2047.%20b8%3DQ%20d1%3DQ%20$16)%0A%0A33.%20Ka4%20Kb6%2034.%20a3%20Kc6%2035.%20Ka5%20d5%2036.%20exd5+%20exd5%2037.%20Kxa6%20d4%2038.%20b5+%20Kc7%2039.%20Ka7%20d3%0A40.%20b6+%20Kd7%2041.%20b7%20d2%2042.%20b8%3DQ%20d1%3DQ%20$16"]
1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 d6 9. f3 Qa5 10. Qd2 Nxd4 11. Bxd4 Be6 12. O-O-O Rfc8 13. Kb1 Bxb3 14. cxb3
b5 15. Rhe1 {(The rather unknown a3 is also tough for black.)} b4 16. Bxf6 bxc3
17. Bxc3 Bxc3 18. bxc3 Rxc3 {(An interesting alternative for black is Qe5,
mentioned on chesspub. It probably gives still a slight pull for white but at
least avoids the dreadful endgame.)} 19. Re3 Rac8 20. Rxc3 Qxc3 21. Qxc3 Rxc3
22. Rc1 Rxc1+ 23. Kxc1 Kf8 24. Kc2 Ke8 25. Kc3 Kd7 26. Kc4 Kc6 27. b4 Kb6 $1

(27... a6 $2 28. a4 e6 (28... g5 29. b5+ axb5+ 30. axb5+ Kb6 31. g3 h5 32. h4 gxh4
33. gxh4 Kb7 34. Kb3 Kc7 35. Kb4 Kb6 36. Ka4 e6 37. Kb4 Kb7 38. Ka5 d5 39. exd5
exd5 40. Ka4 Kc7 41. Kb3 Kb6 42. Kb4 f6 43. Ka4 f5 44. Kb4 f4 45. Ka4 $18) 29. h4 h6 (29... f6 30. g4 g5 31. b5+ axb5+ 32. axb5+ Kb6 33. hxg5 fxg5 34.Kb4 Kc7 

35. Ka5 Kb7 36. b6 Kb8 37. Ka6 h6 38. Kb5 Kb7 39. Ka5 Kc8 40. Kb4 Kb8 41. Ka4 Kc8 42. Ka5 Kb8 43. Ka6 $18) 30. g4 Kb6 31. b5 axb5+ (31... a5 32. f4 Kc7 33. 

f5 Kb6 34. f6 g5 35. h5 Kb7 36. e5 d5+ 37. Kc5 Kc7 38. b6+
Kb7 39. Kd6 d4 40. Ke7 d3 41. Kxf7 d2 42. Kg7 d1=Q 43. f7 Qxg4 44. f8=Q $18 {
This wins but still requires some good technique.})32. axb5 Kb7 33. Kb4 Kb6
34. h5 gxh5 (34... g5 35. Kc4 f6 {(Obligatory as f4 was threatening.)} 36. Kb4
d5 37. exd5 exd5 38. Ka4 d4 39. Kb4 d3 40. Kc3 d2 41. Kxd2 Kxb5 42. Kd3 $18)
35. gxh5 d5 36. exd5 exd5 37. Ka4 f6 38. Kb4 f5 39. f4 $18)

(27... e6 $2 28. b5+ Kb6 29. Kb4 h5 30.
g4 hxg4 31. fxg4 g5 32. h3 f6 33. a3 Kc7 34. Ka5 d5 35. exd5 exd5 36. Kb4 d4
37. a4 d3 38. Kc3 Kb6 39. Kxd3 Ka5 40. Kc4 Kxa4 41. Kc5 Ka5 42. Kc6 $18)

28. h4 $1 {(Keeping the pawn on a4 gives white maximum chances to get black in zugzwang)}

(28. a4 $2 e6 29. h4 Kc6 30. g4 (30. b5+ Kb6 31. Kb4 f6 $1 {(Black has just sufficient pawnmoves.)} 32. h5 (32. g3 Kc7 33. Ka5 d5 34. exd5 exd5 35. Kb4 d4 

36. h5 d3 37. Kc3 Kb6 38. Kxd3 Ka5 39. h6 Kxa4 40. Kc4 Ka5 41. Kc5 f5 42. f4 $11) 32... Kc7 33. Ka5 d5 34. exd5 exd5 35. Kb4 d4 36. Kc4 Kb6 37. h6 d3 38. 

Kxd3 Ka5 39. f4 Kxa4 40. Kc4 Ka5 41. Kc5 f5 42. g3 Ka4 43. b6 axb6+ 44. Kxb6 $11 {(White can win the h-pawn but it is still a draw as black can lock up the 

king with Kf7)}) 30... h6 31. f4 (31. h5 gxh5 32. gxh5 Kb6 $11 {(Still no a6 due to b5. In this position black does not have to fear anymore the plan with 

f4-f5-f6 due to the open g-file.)}) 31... a6 $1 {(This move is not discussed by the Argentinian IM Luis Rodi Maletich neither in the comments of the 
correspondence game Rittner - Arlind.)} 32. f5 g5 33. hxg5 hxg5 34. fxe6 fxe6 35. b5%2B axb5+ 36. axb5+ Kb6 37. Kb4 Kb7 38. Ka5 Ka7 39. b6+ Kb7 40. Kb5 e5 

41. Ka5 d5 42. exd5 e4 43. d6 e3 44. d7 e2 45. d8=Q e1=Q+ 46. Kb5 Qe8+ 47. Qxe8 $11 {(This was the end of the game Bukavshin, Ivan - Belous, Vladimir played 

in 2010.)})


28... e6 29. g4 $1 h6 30. f4 $1

(30. h5 $2 gxh5 31. gxh5 Ka6 $1 {(Black still can not play a6 due to the plan based on Kb3.)} 32. Kb3 Kb5 33. a3 Kc6 34. Ka4 Kb6 35. f4 a6 36. Kb3 Kc6 37. Kc4 

Kb6 38. a4 Kc6 39. b5+ axb5+ 40. axb5+ Kb6 41. Kb4 d5 42. exd5 exd5 $11 {(With the pawn on f3 it is won but not when the pawn stands on f4.)})

30... a6 $1

(30... Ka6 $2 31. a4 Kb6 32. a5+ Ka6 33. f5 $18)

(30... h5 $2 {(I had a long look at this possibility but
I believe after some adventures white wins anyway.)} 31. gxh5 gxh5 32. f5 a6
33. a4 Kc6 34. Kd4 Kb6 35. Ke3 Kc6 36. Kf4 d5 37. Ke5 dxe4 38. Kxe4 Kd6 39. f6
Kc6 40. Ke5 Kc7 41. Kf4 Kd6 42. Kg5 e5 43. Kxh5 Kd5 44. b5 axb5 45. axb5 e4 46.
b6 e3 47. b7 e2 48. b8=Q e1=Q 49. Qa8+ Kc5 50. Qf8+ Kc6 51. Qxf7 $18 {(And we
hit the tablebases)})

31. Kb3 Kc6 $1

(31... Kb5 $2 32. h5 gxh5 33. gxh5 Kc6 34.Ka4 Kb6 35. a3 Kc6 36. Ka5 d5 37. exd5+ exd5 38. a4 $18)


32. g5 {(Here white and black have to make a choice which queenendgame they want to play. It is unclear
to me which path is exactly giving the best winning chances for white and the best drawing chances
for black so I summarized the possibilities)}

(32. Ka4 f6 33.Ka5 (33. g5 fxg5 34. fxg5 h5 (34... hxg5 35. hxg5 d5 36. exd5+ Kxd5
37. Ka5 Kc4 38. a3 e5 39. Kxa6 e4 40. b5 e3 41. b6 e2 42. b7 e1=Q 43. b8=Q $16)
35. Ka5 d5 36. exd5+ exd5 (36... Kxd5 37. Kxa6 e5 38. b5 e4 39. b6 e3 40. b7 e2
41. b8=Q e1=Q $16) 37. Kxa6 d4 38. b5+ Kc7 39. Ka7 d3 40. b6+ Kd7 41. b7 d2 42. b8=Q d1=Q $16)
33... d5 34. exd5+ exd5 (34... Kxd5 35. Kxa6 e5 36. fxe5 fxe5 37. b5 e4 38. b6 e3
39. b7 e2 40. b8=Q e1=Q $16) 35. Kxa6 d4 36. b5+ Kc7 37. Ka7 d3 38. b6+ Kd7 39. b7 d2 40. b8=Q d1=Q $16)

32... h5 

(32... hxg5 33. hxg5 Kb5 34. Kc3 Kb6 35. Kb2 Kc6 36. Ka3 Kb5 37. Kb3 Kc6 38. Ka4 Kb6 39. a3 Kc6
40. Ka5 d5 41. exd5+ exd5 42. Kxa6 d4 43. b5+ Kc7 44. Ka7 d3 45. b6+ Kd7 46. b7 d2 47. b8=Q d1=Q $16)

33. Ka4 Kb6 34. a3 Kc6 35. Ka5 d5 36. exd5+ exd5 37. Kxa6 d4 38. b5+ Kc7 39. Ka7 d3
40. b6+ Kd7 41. b7 d2 42. b8=Q d1=Q $16