7. Kt to B 3 7. B takes P 8. B to Q 3 8. P to B 3
9. P takes P 9. Kt takes P 10. Q to K 2 10. Castles 11. P to Q R 3 11. P to Q R 3 The game is so far even.
This move of Black constitutes the _Sicilian Defence_, its main object being to prevent White from establishing a centre.
White might also play 2. B to B 4, or 2. Kt to K B 3; the development of the Q Kt is, however, generally adopted.
3. Kt to B 3 3. P to K 3 4. P to Q 4 4. P takes P 5. Kt takes P 5. Kt to B 3 6. Kt (Q 4) to Kt 5 6. B to Kt 5 7. P to K R 3 7. B takes Kt: ch. 8. Kt takes B 8. P to Q 4
Black remains with an isolated Queen's pawn after the exchanges which follow; but as in most forms of the Sicilian Defence, Black's Queen's pawn is weak, the position arising from Black's text-move is not inferior to any other he can obtain.
9. P takes P 9. Kt takes P 10. Kt takes Kt 10. Q takes Kt 11. Q takes Q 11. P takes Q 12. B to K B 4 12. Castles 13. Castles 13. B to K 3 Even game.
The _Queen's Gambit_, 1. P to Q 4, P to Q 4; 2. P to Q B 4, P takes P; 3. P to K 3, or 3. P to K 4, or 3. Kt to K B 3, &c., is rarely played, because the Gambit pawn cannot, as in the King's Gambit, be defended by Black with the Knight's pawn; therefore the offered Gambit is usually declined (say, by 2. ... P to K 3), and the games take the form of close openings. The Queen's Gambit Declined is a very popular Opening in tournaments.
The Fianchetto takes various form--viz., the _King's Fianchetto_, wherein White commences with 1. P to K Kt 3, and 2. B to Kt 2; and the _Queen's Fianchetto_, where White plays 1. P to Q Kt 3, and 2. B to Kt 2; the _King's Fianchetto Defence_, where Black defends with 1. ... P to K Kt 3, and 2. ... B to Kt 2; and the _Queen's Fianchetto Defence_, where Black defends with 1. ... P to Q Kt 3, and 2. ... B to Kt 2. The _Double Fianchetto_ is where either White or Black develops both Bishops at Kt 2. The shape of White's development against either Fianchetto defence should be as under:
WHITE. BLACK. 1. P to K 4 1. P to K Kt 3 2. P to K B 4 2. P to K 3 3. P to Q 4 3. B to Kt 2 4. Kt to K B 3 4. P to Kt 3 5. P to B 3 5. B to Kt 2 6. B to Q 3 6. Kt to K 2 7. B to K 3 7. P to Q 4 8. P to K 5 8. Kt to Q 2 9. Q Kt to Q 2, &c.