Mujannah Formation Annihilated!- Stockfish 16 dev vs Revenge -Old Benoni Defense, Mujannah Formation

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PGN OF THE GAME:

[Event “CCC 19 Rapid: Semifinals (15|3)”]
[Site “?”]
[Date “2022.11.13”]
[Round “1”]
[White “Stockfish”]
[Black “Revenge”]
[Result “1-0”]
[WhiteElo “?”]
[BlackElo “?”]
[Variant “Standard”]
[TimeControl “900+3”]
[ECO “A43”]
[Opening “Benoni Defense: Old Benoni, Mujannah Formation”]
[Termination “Unknown”]
[Annotator “lichess.org”]

1. d4 c5?! { (0.00 → 0.98) Inaccuracy. Nf6 was best. } (1… Nf6 2. c4 e6 3. Nf3 d5 4. cxd5 exd5 5. Bf4 c6 6. Nc3) 2. d5 f5?! { (0.80 → 1.47) Inaccuracy. Nf6 was best. } { A43 Benoni Defense: Old Benoni, Mujannah Formation } (2… Nf6 3. Nc3 d6 4. e4 e6 5. Bc4 Be7 6. Nge2 O-O 7. O-O) 3. g3 Nf6 4. Bg2 g6 5. Nh3 Na6?! { (0.95 → 1.67) Inaccuracy. Bg7 was best. } (5… Bg7 6. Nc3 O-O 7. O-O d6 8. Nf4 Na6 9. a4 Nc7 10. e4) 6. c4?! { (1.67 → 0.75) Inaccuracy. d6 was best. } (6. d6 Qb6) 6… d6 7. Nf4 Bg7 8. h4 Nc7 9. a4 O-O 10. h5 Nxh5 11. Nxh5 gxh5 12. Rxh5 Bd7 13. Qc2 a6?! { (1.05 → 1.96) Inaccuracy. Qe8 was best. } (13… Qe8 14. Rh1 b6 15. Bf3 Qg6 16. Ra3 a6 17. Re3 Qf6 18. Kf1 b5 19. b3 b4 20. Rh4) 14. g4 Qe8 15. Ra3 Qg6 16. Rg5 Qf6 17. gxf5 Bxf5 18. e4 Bg6 19. Rag3 e6 20. f4 Rae8 21. Nc3 b5 22. Bf3 Rf7 23. Bh5 exd5?! { (2.38 → 3.14) Inaccuracy. Bxh5 was best. } (23… Bxh5 24. Rxh5) 24. Bxg6 hxg6 25. Rxg6 Qh4 26. Qg2 Kf8 27. cxd5 Bxc3+ 28. bxc3 Ke7 29. Kd1 Rh8 30. Kc2 Ne8 31. axb5 axb5 32. Qe2 Rf6 33. R6g4 Qh7 34. f5 c4 35. Bg5 Kf8 36. Qe3 b4 37. cxb4 Qd7 38. Qc3 Rh2+ 39. Rg2 Rh1 40. Bxf6 Qa4+ 41. Kd2 Rf1 42. Ke3 Qd1 43. R2g3 Kf7 44. Bd4 Rh1 45. Qxc4 Re1+ 46. Kf4 Qd2+ 47. Be3 Qh2 48. Rg7+ Kf8 49. Rg6 Ra1 50. Qb5 Qh4+ 51. R3g4 Qh2+ 52. Kg5 Qh7 53. Bd4 Rc1?! { (11.19 → Mate in 10) Checkmate is now unavoidable. Rh1 was best. } (53… Rh1 54. Qe2 Kf7 55. b5 Rh2 56. Qe1 Qh5+ 57. Kf4 Rh1 58. Qf2 Qh3 59. Qg2 Qxg2 60. Rxg2) 54. Bg7+ Qxg7 55. Rxg7 Nxg7 56. Qd7 Ne8 57. Kh6 Rh1+ 58. Kg6 Rh6+ 59. Kxh6 Nf6 60. Qxd6+ Ke8 61. Qb8+ Ke7 62. Rg7# { White wins. } 1-0

The Old Benoni starts with 1.d4 c5. White usually replies 2.d5 in order to gain space, as 2.dxc5 e6 leads to no advantage and 2.e4 transposes to the Morra Gambit, also promising equality at best. The Old Benoni may transpose to the Czech Benoni, but there are a few independent variations. This form has never attracted serious interest in high-level play, though Alexander Alekhine defeated Efim Bogoljubow with it in one game of their second match, in 1934. The Old Benoni is sometimes called the Blackburne Defense, after Englishman Joseph Henry Blackburne, the first player known to have used it successfully.