Gibraltar Rd8: One point lead

[Event "Gibraltar Masters 2015"] [Site "Caleta ENG"] [Date "2015.02.03"] [Round "8.1"] [White "Nakamura, Hikaru"] [Black "Yu, Yangyi"] [Result "1-0"] [ECO "B22"] [Annotator "Ramirez Alvarez,Alejandro"] [PlyCount "77"] [EventDate "2015.01.27"] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. Na3 Nf6 5. Nf3 Nc6 6. Bc4 Qd8 7. O-O a6 8. Nc2 Bg4 9. d4 e6 10. h3 Bxf3 11. Qxf3 Rc8 12. Rd1 cxd4 13. Bb3 Qc7 14. Nxd4 Nxd4 15. cxd4 Bd6 16. Bg5 Ke7 {You knwo something went wrong in the opening when you have to play Ke7 to defend your f6 knight.} 17. Re1 h6 18. Bxf6+ gxf6 19. Re3 h5 20. Rae1 Qd7 21. Qe4 Kf8 22. d5 e5 23. Rf3 Kg7 24. Bc2 {The situation is dangerous for Black: any position in which the king is weak and there are opposite colored bishops present gives the attacking chance a big advantage.} h4 25. Rf5 Rh6 26. Bd3 Qc7 27. Qg4+ Kf8 28. Rf3 {Black is holding on, but his position remains unpleasant. Yu Yangyi's next move opens him up to some tactical ideas.} Qc5 $6 29. Bxa6 {The bishop is taboo, but perhaps this was not the best move.} (29. Bh7 $5 {was also worth considering.}) 29... Rg6 $6 (29... bxa6 30. Rc3 $18 {the skewer down the c-file ends the game.}) 30. Qf5 Kg7 31. Bd3 Qb4 32. Rfe3 Rc5 33. Qd7 $1 {The queen coming into play is hard to stop.} Rc7 34. Qd8 Rg5 $2 (34... f5 35. Bxf5 Rf6 36. Bh7 $1 (36. Bb1 Qd2 { actually lets Black equalize as it is White's king that is in some trouble.}) 36... Qd2 37. Qg8+ Kh6 38. R3e2 Qg5 {and things are not so clear yet. The position with the opposite co lored bishops is not trivial to win.}) 35. Re4 $1 {Now the coordination of the queen and the rook on h8 is deadly.} Qd2 36. Bf1 Qxd5 37. Rxh4 Kg6 38. g4 f5 39. Qg8+ (39. Qg8+ Kf6 40. Rh6+ Rg6 41. Rxg6+ fxg6 42. Qxd5) 1-0

[Event "Gibraltar Masters 2015"] [Site "Caleta ENG"] [Date "2015.02.03"] [Round "8.4"] [White "Svidler, Peter"] [Black "Hou, Yifan"] [Result "1/2-1/2"] [ECO "A18"] [SetUp "1"] [FEN "2N1k3/8/5R2/p1K1P3/8/2P5/2b5/3r4 b - - 0 45"] [PlyCount "16"] [EventDate "2015.01.27"] 45... a4 46. e6 {Svidler has been nursing an advantage since the middlegame, and now has a winning e ndgame. Black has no good way of stopping the e-pawn.} Bb3 47. e7 $6 (47. Rh6 $1 Bxe6 {is the only way of stopping mate.} 48. Rxe6+ Kd7 49. Rc6 {keeping the knight alive is, of course, important.} a3 50. Nb6+ Ke8 51. Rc8+ Kf7 52. Ra8 {and White stops the pawn without problems.}) 47... Bf7 $1 48. c4 $2 (48. Nd6+ Kxe7 49. Rxf7+ Ke6 {doesn't work as White will lose his knight on the next move, for example} 50. Rh7 Rd5+ $1 51. Kb4 Kxd6 $11) ( 48. Rf2 $1 {Was the only way to win} a3 49. Nd6+ Kxe7 50. Nxf7 a2 51. Rxa2 Kxf7 52. Re2 $1 {And the king is cut off too far from the pawn, White wins relatively easily.}) 48... a3 49. Nd6+ Kd7 $3 {This is the brilliant point Svidler must have missed.} (49... Kxe7 50. Rxf7+ Ke6 51. Ra7 Rxd6 52. Rxa3 {is a losing endgame.}) 50. Rxf7 (50. Nxf7 a2 51. Re6 Ke8 $1 52. Nd6+ Rxd6 53. Re1 Ra6 $11) 50... Rxd6 51. e8=Q+ Kxe8 52. Ra7 Rh6 53. Rxa3 {This particular endgame is very easy to draw. Refer to the Philidor Position in any endgame manual.} 1/2-1/2