[Event "Hastings"] [Site "?"] [Round "0"] [White "Euwe"] [Black "Thomas"] [Result "1-0"] [FEN "r1b2rk1/pp2qppp/2p5/5P2/2B5/2R1P3/PP4PP/3Q1RK1 b - - 0 1"] {A well-known position from the orthodox Queen's gambit declined. This position, which has occured hundred of times in practise, provides an excellent exmple of an active bishop. The problems facing both players are clear-cut. White must play for a direct attack, to make the most from his temporary advantage. Black still has to solve the problem of how to put his Bishop to work.} 1... b5 {Black sets about it by force} 2. Bb3 b4 3. f6 { An unpleasant intermediate move which breaks open the King's position.} (3. -- Ba6 {solving the problem of developing the bishop}) (3. Rxc6 Qxe3+ 4. Kh1 Bb7 { offers White less}) 3... gxf6 4. Rxc6 Qxe3+ 5. Kh1 Bb7 {The most consequent continuation by which the Black bishop also assumes an active role. But the weakening of the King's position now begins to bearfruit} (5... Be6 6. Bxe6 fxe6 7. Qg4+ Qg5 8. Qxe6+ Kh8 9. Rxf6 Rg8 (9... Rfe8 10. Qf7 $1) 10. Rf2 $1) ( 5... f5 6. Qh5 {winning attack} (6. Rf3)) 6. Rcxf6 Qe4 7. Qd2 Kh8 (7... Rad8 $2 8. Qg5+ Kh8 9. Rxf7 $18) 8. Bxf7 Rac8 (8... Rad8 9. Qg5 (9. Qf2 Qe7 10. Bb3 Rxf6 11. Qxf6+ Qxf6 12. Rxf6 Bd5 $1) 9... Rg8 10. Bxg8 Rxg8 11. Rf8 Qxg2+ $11 12. Qxg2 Bxg2+ 13. Kg1 Bxf1+ 14. Rxg8+ Kxg8 15. Kxf1 {draw}) 9. R6f2 $1 (9. Bb3 $2 Rxf6 10. Rxf6 Qxg2+ 11. Qxg2 Rc1+ 12. Rf1 Rxf1#) 9... Rcd8 (9... Qg4) 10. Qg5 Rd6 (10... Qd4 11. Bd5 Qg7 (11... Rxf2 12. Qxd8+ Kg7 13. Qg5+ Kf8 14. Qg8+ Ke7 15. Re1+ Kd6 16. Bxb7 $18) 12. Rxf8+ Rxf8 13. Rxf8+ Qxf8 14. Qe5+ Qg7 15. Qe8+ Qg8 16. Qxg8#) 11. Bd5 $1 { The activity of the Bishop has reached its high point} 1-0