[Event "Moscow-Prague"] [Site "Moscow"] [Date "1946.??.??"] [Round "6"] [White "Zita, Frantisek"] [Black "Bronstein, David I"] [Result "0-1"] [ECO "E68"] [Annotator "peter"] [SetUp "1"] [FEN "r1b1r1k1/1p3pbp/1qpp2p1/2n5/2PNP1n1/1PN3PP/3Q1PB1/BR2R1K1 b - - 0 17"] [PlyCount "27"] [EventDate "1946.??.??"] [EventType "team"] [EventRounds "14"] [EventCountry "URS"] [SourceTitle "MCL"] [Source "ChessBase"] [SourceDate "1999.07.01"] [SourceVersion "1"] [SourceVersionDate "1999.07.01"] [SourceQuality "1"] {[#]} 17... Rxa1 $1 {undermining the defence of b3, c3 and most critically d4.} (17... Nxf2 {is the wrong move order as this is adequately met by} 18. Na4) 18. Rxa1 (18. hxg4 Rxb1 19. Rxb1 Bxg4 {leaves White a pawn down and with dark square weaknesses}) 18... Nxf2 $1 {Either way of taking the knight lands White in trouble, as Black has threats along both the g7-a1 diagonal and the b6-g1 diagonal.} 19. Re3 {defending c3 but...} (19. Kxf2 Nxb3 20. Qd3 (20. Rab1 Bxd4+ 21. Ke2 Nxd2 22. Rxb6 Bxc3 $18) 20... Bxd4+ 21. Kf1 (21. Kf3 Nxa1 22. Rxa1 Qb2 $19) 21... Nxa1 22. Rxa1 Qb2 $19 {and White cannot defend against all of Qxa1, Qxc3 and Qf2 mate.}) (19. Qxf2 Nd3 20. Qd2 (20. Na4 Bxd4 21. Nxb6 Bxf2+ 22. Kf1 Bxb6 {with two pieces and a pawn for the rook, Black is winning easily.}) 20... Nxe1 21. Rxe1 (21. Rd1 Bxh3 $19) 21... Qxd4+ 22. Qxd4 Bxd4+ 23. Kf1 Bxc3 $19) ( 19. Kh2 Ncd3 20. Nf3 Nxe1 21. Rxe1 $19 {Black is a pawn up, White has many weaknesses and Black can even grab a second pawn with Qxb3 if he wishes}) 19... Nxh3+ 20. Kh2 (20. Bxh3 Bxh3 {it is remarkable how powerless White is here e.g. } 21. Nce2 (21. Rb1 Bh6) 21... Ne6 22. Nxe6 Bxa1) 20... Nf2 {threatening Ng4+} 21. Rf3 Ncxe4 22. Qf4 Ng4+ 23. Kh1 f5 24. Nxe4 Rxe4 25. Qxd6 Rxd4 26. Qb8 Rd8 27. Ra8 Be5 28. Qa7 Qb4 29. Qa2 {and now Bronstein finds a wonderful manouevre to finish the game} Qf8 $1 30. Bh3 Qh6 {and with the Black rook able to join the attack, White has no satisfactory defence of his king.} 0-1