Event: Round 4: Donaldo Paiva - Calvin Klaasen
Date: 2022-03-08
White: Donaldo Paiva
WhiteTitle: CM
Black: Calvin Klaasen
BlackTitle: FM
Result: 0-1
ECO: D59
Opening: Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation
Variant: Standard

1. d4 { [%eval 0.3] } 1... d5 { [%eval 0.28] } 2. c4 { [%eval 0.36] } 2... e6 { [%eval 0.3] } 3. Nf3 { [%eval 0.0] } 3... Nf6 { [%eval 0.17] } 4. Nc3 { [%eval 0.0] } 4... Be7 { [%eval 0.0] } 5. Bg5 { [%eval 0.0] } 5... h6 { [%eval 0.16] } 6. Bh4 { [%eval 0.0] } 6... O-O { [%eval 0.0] } 7. e3 { [%eval 0.0] } 7... b6 { [%eval 0.07] } 8. cxd5 { [%eval 0.19] } 8... Nxd5 { [%eval 0.19] } 9. Bxe7 { [%eval 0.08] } 9... Qxe7 { [%eval 0.11] } 10. Nxd5 { [%eval 0.12] } 10... exd5 { [%eval 0.06] } 11. Qb3 { [%eval -0.15] } 11... Be6 { [%eval -0.12] } 12. Rc1 { [%eval -0.24] } 12... c5 { [%eval -0.03] } 13. Qa3 { [%eval -0.12] } 13... Rc8 { [%eval -0.24] } 14. Be2 { [%eval 0.02] } 14... Kf8 { [%eval -0.04] } 15. dxc5 { [%eval -0.18] } 15... bxc5 { [%eval -0.26] } 16. O-O { [%eval -0.1] } 16... Nd7 { [%eval 0.18] } 17. Ba6 { [%eval 0.28] } 17... Rcb8 { [%eval 0.43] } 18. b3 { [%eval 0.19] } 18... Rb6 { [%eval 0.56] } 19. Be2?! { [%eval 0.0] } { Inaccuracy. Qa5 was best. } 19... a5 { [%eval -0.07] } 20. Rc3 { [%eval -0.46] } 20... a4 { [%eval -0.35] } 21. Rfc1 { [%eval -0.21] } 21... Rbb8 { [%eval -0.17] } 22. Qb2?! { [%eval -0.72] } { Inaccuracy. bxa4 was best. } 22... Rb4?! { [%eval 0.0] } { Inaccuracy. Qf6 was best. } 23. Qa3 { [%eval -0.13] } 23... Rbb8 { [%eval -0.08] } 24. Qb2?! { [%eval -0.8] } { Inaccuracy. bxa4 was best. } 24... Kg8 { [%eval -0.85] } 25. Qc2 { [%eval -0.53] } 25... Rb4 { [%eval -0.35] } 26. Ne1 { [%eval -0.38] } 26... axb3 { [%eval -0.44] } 27. axb3 { [%eval -0.15] } 27... d4 { [%eval -0.32] } 28. exd4 { [%eval -0.35] } 28... cxd4 { [%eval -0.41] } 29. Rg3?! { [%eval -1.27] } { Inaccuracy. Rc7 was best. } 29... Bxb3? { [%eval -0.03] } { Mistake. Nf6 was best. } 30. Qc6 { [%eval -0.2] } 30... Re8 { [%eval 0.07] } 31. Bf1? { [%eval -1.28] } { Mistake. Qxh6 was best. } 31... Be6?! { [%eval -0.27] } { Inaccuracy. Nf6 was best. } 32. Nd3?! { [%eval -1.25] } { Inaccuracy. Nc2 was best. } 32... Rb6 { [%eval -1.18] } 33. Qe4 { [%eval -1.13] } 33... Qd6 { [%eval -1.19] } 34. Qh4?! { [%eval -2.01] } { Inaccuracy. Qf4 was best. } 34... Bf5 { [%eval -1.56] } 35. Rd1?! { [%eval -2.52] } { Inaccuracy. Qf4 was best. } 35... Nf6 { [%eval -2.83] } 36. f3? { [%eval -4.79] } { Mistake. Qf4 was best. } 36... Bxd3?! { [%eval -3.76] } { Inaccuracy. Kf8 was best. } 37. Bxd3 { [%eval -3.5] } 37... Kf8 { [%eval -3.62] } 38. Bf1?! { [%eval -4.62] } { Inaccuracy. f4 was best. } 38... Rb4 { [%eval -4.73] } 39. f4 { [%eval -4.62] } 39... Re4?! { [%eval -3.27] } { Inaccuracy. Nd5 was best. } 40. Rf3 { [%eval -3.33] } 40... Qc5 { [%eval -2.8] } 41. Bd3?! { [%eval -3.53] } { Inaccuracy. h3 was best. } 41... Re8 { [%eval -3.32] } 42. h3 { [%eval -3.27] } 42... Re3?! { [%eval -2.4] } { Inaccuracy. Rb3 was best. } 43. Qf2?! { [%eval -3.29] } { Inaccuracy. Rf2 was best. } 43... Nd5 { [%eval -3.08] } 44. Kh1 { [%eval -3.76] } 44... Rb8 { [%eval -3.38] } 45. Qf1 { [%eval -3.78] } 45... Rbe8 { [%eval -4.0] } 46. Rf2 { [%eval -4.84] } 46... Qb4 { [%eval -5.52] } 47. Kh2 { [%eval -5.38] } 47... Re1 { [%eval -5.87] } 48. Rxe1 { [%eval -5.75] } 48... Rxe1 { [%eval -6.0] } 49. Rb2 { [%eval -5.97] } 49... Rxf1 { [%eval -5.5] } 50. Rxb4 { [%eval -5.35] } 50... Nxb4 { [%eval -5.39] } 51. Bxf1 { [%eval -5.47] } 51... d3 { [%eval -5.44] } 0-1