[Event "World Championship"] [Site "?"] [Round "0"] [White "Smyslov"] [Black "Euwe"] [Result "1-0"] [ECO "C70"] [Opening "Spanish: 4.Ba4"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 {Black is playing the Open Variation where his active centralized pieces compensate for the pronounced weakness of his c5 and c6 squares.} 9. Qe2 { Played with the idea of clearing the d1 square for the White rook.} 9... Nc5 { With the White rook cleared to move to d1 Black will try to reduce the pressure on d5 by eliminating the bishop on b3.} 10. Rd1 Nxb3 11. axb3 Qc8 12. c4 dxc4 $13 {Black shouldn't except the pawn sacrifice since he will fall behind in development. 12...Nb4 13.cxb5 axb5 14.Rxa8 Qxa8 15.Qxb5+ c6 White's extra pawn is the useless doubled b-pawn. Black has plenty of counterplay$} 13. bxc4 Bxc4 14. Qe4 Ne7 {Going backwards with the knight only furthers Black's kingside development. 14...Nb4 15.Na3 Although, White still retains the initiative. Black would be able to develop his kingside.} 15. Na3 c6 { Black has to give back the pawn. However, this still doesn't help his lagging development. 15...Bb3 16.Rd3 Be6 17.Nxb5 Bf5 would allow White a winning combination.} 16. Nxc4 bxc4 17. Qxc4 Qb7 { 17...Qe6 18.Rxa6 when White wins if Black accepts the queen sacrifice.} 18. e6 {White wastes no time in attacking Black's exposed king.} 18... f6 19. Rd7 Qb5 20. Qxb5 cxb5 21. Nd4 { Black's lagging development carries over into the ending.} 21... Rc8 22. Be3 Ng6 23. Rxa6 Ne5 24. Rb7 Bc5 { Black has finally gotten his bishop out but it's too late to make a difference. } 25. Nf5 O-O 26. h3 {Black resigned since he is a pawn down and doesn't have a defense to White's attack on the seventh rank. 26.h3 g6 27.Nh6+ Kh8 28.Bxc5 Rxc5 29.Raa7 With mate soon to follow by Rxh7.} 1-0