[Event "Wageningen"] [Site "?"] [Round "0"] [White "Olfasson"] [Black "Duckstein"] [Result "1-0"] [ECO "A22"] [Opening "English: Bremen, Reverse Dragon"] 1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Ne7 6. Nf3 Nbc6 7. O-O Nf5 8. b4 a6 9. Bb2 Be6 10. Ne4 f6 11. a3 Qd7 12. Qc2 O-O-O {Black's decision to castle Queenside was very risky, in view of White's control of the half-open c-file, the weakness created by .. Pa6, and teh White Bg2's range extending all teh way down the long diagonal toward the Black King's new residence. Presumably he reckoned on neutralizing the attack on his King by exerting pressure in the central sector.} 13. Rfc1 Nfd4 14. Bxd4 $1 {Quite correct. The Queen Bishop is not needed in the coming attack on Black's King} 14... exd4 ( 14... Nxd4 15. Nxd4 exd4 16. Nc5 Bxc5 17. Qxc5 Kb8 { WHITE TO MOVE: How to continue the attack?} 18. b5 $1 axb5 19. Rab1 c6 20. a4 $1 $40) 15. Qb2 (15. Nc5 Bxc5 16. Qxc5 Bd5 $1 {White's King Bishop is shut out} ) 15... d3 16. e3 Kb8 17. Rab1 $1 {White coul d also have played Pb5 but the threat is stronger than the execution. In any ccase, White now threatens Pb5 with even greater force} 17... Na7 18. Nc5 Bxc5 19. bxc5 $1 { once more b7 has to suffer} 19... c6 20. Nd4 Bf7 (20... Bd5 21. Bxd5 cxd5 22. c6 $1) (20... Bg4 21. Rc4 {The pressure on the Black King is overwhelming}) 21. Qb6 {Threatening Qxa6 and Nxc6+} 21... Ka8 {WHITE TO MOVE: Find the tactic} 22. Bh3 $1 Nc8 (22... Qe7 23. Nf5 Qd7 24. Nd6 $18) 23. Bxd7 Nxb6 24. Bxc6 $1 { Winding up with a powerful blow} 24... bxc6 25. Rxb6 $18 1-0