[Event "Beverwijk"] [Site "?"] [Round "0"] [White "Flohr"] [Black "Donner"] [Result "1-0"] [ECO "A04"] [Opening "Reti: 1...c5"] {15. FLOHR (1908-1983) Flohr was a player of splendid positional style. He would hold on to the tiniest of advantages and exploit them with infinite patience and accuracy; but he was also a formidable tactician - in particular in his early years. About 1936 his style began to take on a defenisve cast, and this was the main reason why this Grandmaster never became a serious threat to Alekhine. Here is a fine example of Flohr's positional and tactical powers.} 1. Nf3 c5 2. c4 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O a6 6. Nc3 Rb8 { Preparing the advance ... Pb5, the object of which is to enhance the action of the Bg7 on the longdiagonal} 7. d3 b5 8. cxb5 axb5 9. Be3 {Black's Queenside action has been rather premature, and its disadvantages begin to appear} 9... Nd4 (9... d6 10. d4) 10. Rc1 d6 (10... e6 { To deprive White of his control of d5}) 11. Bxd4 cxd4 12. Nd5 e6 13. Nb4 $1 { Blocking the b-pawn. Black's Queenside attack has only weakened his position there} 13... Ne7 14. Qc2 Bh6 $2 {The idea is to expel White's Rook from the c-file; but Black's best hope of keeping his disadvantage to a minimum would have been O-O} (14... O-O 15. Qc7 Bb7) 15. Nxd4 $1 Bxc1 16. Ndc6 Nxc6 17. Nxc6 Qc7 18. Qc3 $1 {This it the point of White's 15th move} 18... O-O (18... Bxb2 19. Qxb2 O-O 20. Nxb8 Qxb8 21. Bc6 b4 22. Ba4 -- 23. Rb1 {winning the b-pawn}) 19. Nxb8 Qxc3 20. bxc3 Bd2 21. Rb1 Bb7 $1 {The best counterchance} 22. Nd7 $1 ( 22. Bxb7 Rxb8 23. Rxb5 Bxc3 { opposite coloured Bishops give Black drawing chances}) 22... Bxg2 23. Kxg2 (23. Nxf8 Bc6 {The Knight has no escape}) 23... Ra8 24. Rxb5 Ra7 (24... Rxa2 25. Nf6+ Kg7 (25... Kf8 26. c4 {White's technical problem is not difficult}) 26. Ne8+ Kf8 27. Nxd6 Bxc3 28. Rb7 Rxe2 29. Rxf7+ Kg8) 25. Nf6+ Kg7 26. Ne8+ Kf8 27. Nxd6 Bxc3 (27... Rxa2 28. Rb7) 28. Rb8+ Kg7 29. Nb5 1-0