The Bishop may also retire to R 4, to Q 3, or to K 2. The two last mentioned moves cannot be recommended, and may be dismissed; but it is desirable to know the variations arising from 5. ... B to R 4, which is preferred by many eminent players.

6.P to Q 46.P takes P
7.Castles...

White may also play here 7. P takes P, to which Black's best reply is 7. ... B to Kt 3, and not 7. ... B to Kt 5; ch.

...7.P to Q 3

This is the only safe move in this variation. 7. ... P takes P, would be bad unless, on the fifth move, Black had played B to R 4, when the so-called "compromised" defence would have ensued.

7. ... Kt to B 3, which seems a plausible move here, would involve the probable loss of the game—e.g.:

7....7.Kt to B 3
8.P takes P8.B to Kt 3
9.P to K 59.P to Q 4
10.P takes Kt10.P takes B
11.R to K sq.: ch.11.K to B sq.
12.B to R 3: ch.12.K to Kt sq.
13.P to Q 513.Kt to R 4
14.B to K 714.Q to Q 2
15.P takes P15.K takes P
16.Q to Q 216.Q to Kt 5
17.Q to B 3: ch.17.K to Kt sq.
18.Q takes R: ch.18.K takes Q
19.B to B 6: ch.19.K to Kt sq. (or Q to Kt 2)
20.R to K 8: checkmate

7....7.Kt to B 3
8.P takes P8.B to Kt 3
9.P to K 59.P to Q 4
10.P takes Kt10.P takes B
11.R to K sq.: ch.11.K to B sq.
12.B to R 3: ch.12.K to Kt sq.
13.P to Q 513.Kt to R 4
14.B to K 714.Q to Q 2
15.P takes P15.K takes P
16.Q to Q 216.Q to Kt 5
17.Q to B 3: ch.17.K to Kt sq.
18.Q takes R: ch.18.K takes Q
19.B to B 6: ch.19.K to Kt sq. (or Q to Kt 2)
20.R to K 8: checkmate
8.P takes P8.B to Kt 3
9.P to Q 59.Kt to R 4

The best move. It is the Normal Defence to the previous move, which constitutes the Normal Attack.