[Event "?"] [Site "?"] [Date "1938.??.??"] [Round "?"] [White "X"] [Black "Y"] [Result "1-0"] [ECO "D39"] [Annotator "Renaud & Kann"] [PlyCount "41"] [Source "Batsford"] [SourceDate "2015.01.25"] 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Bg5 dxc4 5. e4 Bb4+ 6. Nc3 c5 {A variation of the Queen's Gambit Accepted, which was played a great deal by Viennese players from 1935 to 1938 and analysed by Gruenfeld.} 7. Bxc4 {An innovation credited to the Russian player Kotov (in his game against Yudovich). Previously, 7.e5 was played (Fine-Euwe, A.V.R.O, 1938. It was of particular interest to the players on board the Piriapolis as it was not included in the 6th. Edition of Modern Chess Openings, revised by Fine, which had just been published and which everyone had with them on board.} cxd4 8. Nxd4 Qa5 9. Bxf6 $1 Bxc3+ { Yudovich dared not embark on ny adventures and preferred 9. ....gxf6, after which White stood much better.} 10. bxc3 Qxc3+ 11. Kf1 $1 Qxc4+ 12. Kg1 ({ Diagram [#] An extraordinary position and one which after the Tournament of Nations in Buenos Aires was made the object of deep analysis. These seemed to prove that the only defence for Black is :} 12. Kg1 Nd7 13. Rc1 Qa6 14. Bxg7 Rg8 15. Bh6 {with a position in which only practice can determine if one of the sides stands better than the other.}) 12... O-O $1 13. Qg4 g6 14. Qf4 { Threatening to play Qh6 in order to inflict Mate No.9.} Nd7 {To remove the dangerous Bishop.} 15. e5 {Threatening 16.Nf5! winning the Queen.} Nxf6 16. exf6 {Now the Bishop has been replaced by a Pawn and it remains to parry the threat of Mate No.8.} Kh8 17. Rd1 {Theatening, in particular, to play h4-h5! and defending the Knight.} Qb4 {In order to go to f8 to defend the weak g7 square.} 18. Qh6 Rg8 19. Nf3 $1 {The Queen's Knight can now equally go to e5 or g5.} Qf8 20. Ng5 $1 {Diagram [#]} (20. Ng5 {A splendid problem move. If} Qxh6 21. Nxf7# {Back thinks he can get away with a rook sacrifice.}) 20... Rg7 21. Rd8 $1 {Becase, now that the Queen is pinned, the new threat of Mate N.8 22,Qxg7 mate, can be parried only be (Sic) retreating the Rook, which allows the other mate 22.Qxh7 mate.} 1-0