[Event "Slav Cup"] [Site "ICCF"] [Date "????.??.??"] [Round "?.5"] [White "Hrzina, Boris"] [Black "Zhdanenia, Konstantin A."] [Result "1-0"] [ECO "E18"] [WhiteElo "2352"] [BlackElo "2316"] [Annotator "Stockfish 15 Tactical Analysis"] [PlyCount "141"] [EventDate "2021.??.??"] [WhiteTeam "Croatia"] [BlackTeam "Belarus"] [WhiteTeamCountry "CRO"] [BlackTeamCountry "BLR"] {[%evp 18,141,61,36,61,52,57,50,70,42,92,51,79,70,79,85,81,85,80,84,77,63,63, 73,72,62,87,80,87,76,81,66,75,70,83,77,122,122,107,92,122,113,122,122,117,122, 121,110,116,121,105,102,84,83,93,87,121,116,106,106,98,113,107,73,122,97,160, 160,160,160,160,160,160,160,160,160,160,160,160,160,160,160,160,160,160,139, 160,160,158,167,219,218,218,185,173,176,793,750,969,961,962,859,961,957,875, 754,1154,1069,1114,1103,1097,950,1158,1089,1100,1038,1155,1125,1149,1125,1125, 1125,1113,954,1020,864]} 1. c4 Nf6 2. Nf3 e6 3. Nc3 b6 4. g3 Bb7 5. Bg2 Be7 6. d4 O-O 7. O-O Ne4 8. Bd2 d6 9. d5 Nxd2 10. Nxd2 {dxe6 is the strong threat.} e5 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3).} 11. b4 {[%CAl Oc4c5]} Nd7 {Inhibits c5.} 12. a4 {[%CAl Ba2a4,Ba4a5][%mdl 32] [#]} f5 $146 {White is slightly better.} ({Predecessor:} 12... Rc8 13. a5 a6 14. Qc2 Rb8 15. b5 Nc5 16. Rfb1 axb5 17. axb6 bxc4 18. Nxc4 Ba6 19. Rxa6 Nxa6 {1-0 (28) Biskopp,W (2309)-Hahner,A (2110) Remote email 2013}) 13. a5 Bc8 (13... e4 $14) 14. Qc2 (14. Nb3 $16) 14... g6 15. Ra3 a6 $1 16. Nb3 {[%CAl Bd2b3,Bb3d4,Bd4c6] [%mdl 32]} e4 17. Nd4 Ne5 18. axb6 cxb6 19. Qa2 Qc7 {Inhibits Nc6.} 20. Nc6 { aiming for Nxe5.} Bf6 {[#]} 21. Nb5 $1 Qd7 {[%CAl Oe5c4]} 22. Nbd4 Qf7 23. Rd1 Re8 24. Nxe5 Bxe5 25. e3 g5 26. Qd2 Bg7 ({Black should try} 26... Kh8) 27. Bf1 $16 {[%CAl Od4e6]} Kh8 {[%CAl Of5f4]} 28. Ne6 $1 {Inhibits f4.} Bxe6 29. dxe6 Rxe6 30. c5 $1 dxc5 31. Bc4 cxb4 32. Bxe6 Qxe6 33. Qxb4 {[%CAl Oa3a6] Black must now prevent Rxa6!} Bf8 34. Qb2+ {[%mdl 1024] White has strong compensation.} Kg8 35. Ra4 {Strongly threatening Rad4.} Bc5 {Inhibits Rad4.} 36. Kh1 $1 a5 37. Qb5 $1 Rf8 38. Raa1 {[%CAl Ba4a1,Ba1g1,Bg1d1,Bd1d7][%mdl 32]} h6 39. Rd7 Rf7 40. Rd8+ Kh7 41. Rg1 $1 (41. Qb2 Qf6 42. Qxf6 Rxf6 $15) 41... Rg7 ({Black should play} 41... f4) 42. Rgd1 f4 43. Re8 $1 Be7 (43... Qg4 $2 44. Rdd8 Kg6 45. Qc6+ Kh5 46. Re6 $18 (46. Rh8 Rg6 $11)) 44. exf4 gxf4 45. Rd7 fxg3 46. fxg3 ({Stronger than} 46. hxg3 Qh3+ 47. Kg1 Bc5 48. Rxg7+ Kxg7 $11) 46... Rf7 {[#]} 47. Rdd8 $1 {[%mdl 576] Threatens to win with Rh8+. Pin} Qf6 { Inhibits Rh8+. ( -> ...Qf3+)} 48. Rh8+ $1 Qxh8 49. Rxh8+ Kxh8 50. Qxb6 { [%mdl 4096] Endgame KQ-KRB} Kg7 51. Qd4+ Bf6 52. Qxe4 h5 53. Qf5 h4 {[#]} ( 53... Kh6 $142 54. Kg2 a4 55. Qf4+ Kg6 56. Qxa4 Re7) 54. g4 $1 $18 Be7 55. Qe5+ ({Don't do} 55. Qxa5 Rf6 56. Kg2 Rg6 57. Qe5+ Kf7 58. Qf5+ Kg7 $18) 55... Kg8 56. Qd5 {And now g5 would win.} ({Don't take} 56. Qxa5 Rf6 57. Qa8+ Kf7 $18) 56... Kg7 $2 (56... Kf8 57. Qa8+ Kg7 58. Qxa5 Kf8) 57. Kg2 {Hoping for g5. White is clearly winning.} Kf8 58. Qa8+ Kg7 59. Qxa5 Kf8 60. Qa8+ Kg7 61. Qa1+ Kg6 62. Qb1+ Kg7 63. Qb2+ Kg6 64. Qb6+ Kh7 65. Qb5 Kg7 66. Qe5+ Kh7 67. Qd5 Rg7 68. Qh5+ Kg8 69. Qe8+ Kh7 70. Kf3 Bg5 71. h3 {Weighted Error Value: White=0.02 (flawless) /Black=0.07 (flawless)} 1-0