Ildar Khairullin vs Ernesto Inarkiev (2006)

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Ildar Khairullin vs Ernesto Inarkiev
Russian Championship Superfinal (2006), Moscow RUS, rd 10, Dec-14
Spanish Game: Morphy Defense (C78) · 0-1

ANALYSIS [x]

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Dec-14-06		Peligroso Patzer: According to the tablebases (http://www.k4it.de/index.php?topic=... ), Khairullin was lost from the time the last K-side pawns were traded off (i.e., after 47. ... Kxf4) and, of course, probably earlier (before the material had been reduced to the point where the tablebases could be consulted). This is a bit surprising to me because against a b-pawn (or any rook or knight-pawn for that matter), the defending side in K+R+P vs. K+R ending can hold if it can set up a "back-rank defense". The problem for Khairullin in this game seems to have been that Inarkiev's clever play kept the White King cut off from reaching the b1-square.

Dec-14-06		Dres1: Took me a second to realize that 21.Qxe4 is impossible due to 21...Qxf2+ 22.Rxf2 ...Rd1#. That means that 19.c4 is wrong.

Mar-26-20		g15713: Black to move at 33 click for larger view After Black plays 33...Kf6 FinalGen says Black wins or Draw This is a drawn position if played correctly Although White cannot hold onto b- pawn the resulting rook endgame still should be a draw Game continued after 33...Kf6: 34. Re8 Rb4 35. Kf2 Kg5 36. Re6 Rxb5 click for larger view According to Syzygy this a tablebase draw Reference: 'https://syzygy-tables.info/ Game continued after 36...Rxb5: 37. g3 Rb2+ 38. Kf3 Rb3+ 39. Kf2 b5 40. Rb6 Rb1 41. Kf3 b4 42. Kf2 Kg4 43. Rg6+ Kh5 44. Rf6 Kg5 45. Rb6 Rb3 White to move after 45...Rb3 click for larger view According to both FinalGen and Syzygy 46. Kg2 loses while 46. Ke2 draws! White played 46. Kg2? and now Black played 46...f4! wins <"Whites unfortunate last move (46.Kf2-g2?) denies him of setting a philidor type defense in the ensuing R+P vs. R endgame. 46.Ke2 or 46.Rb8 would have preempted black's winning attempt and were sufficient to hold."> Chess user: Ptero 'https://www.chesspub.com/cgi-bin/ch... 47. gxf4+ Kxf4 White to move click for larger view Shredder confirms this position is a win for Black. <"Attacking pawns on the 5th from behind is a reliable method of defense, even when"> White's <"king is on the long side and his rook must operate on the short side. However this method is only good with BPs, QPs and KPs. It fails in the case of NPs because the edge of the board hampers the"> White <"king."> From Levenfish and Smyslov classic book <Rook Endings> page 31. Hence if we move the pieces from b file to c file click for larger view Shredder now says this position is a draw with White to play Kf2.

Mar-28-20		g15713: A note to the above diagram: As chess user Ptero comments: <if black had a passed c-pawn rather than a b-pawn the position would be drawn. White would then have been able to run with his K to the "short side".> Stockfish after 25-minute analysis: 1) =0.00 (64 ply) 1.Kf2 Ke4 2.Ke2 Rc2+ 3.Kd1 Kd3 4.Rc7 Rg2 5.Kc1 Kc3 6.Kb1 Rb2+ 7.Kc1 Rg2

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