With a Knight and a Bishop the mate can only be given in the corners of the same colour as the Bishop.
Example 39.—In this example we must mate either at Q R 1 or K R 8. The ending can be divided into two parts. Part one consists in driving the Black King to the last line. We might begin, as is generally done in all such cases, by advancing the King to the centre of the board:
| 1. K - K 2 | K - Q 2 |
Black, in order to make it more difficult, goes towards the white-squared corner:
| 2. K - Q 3 | K - B 3 | |
| 3. B - B 4 | K - Q 4 | |
| 4. Kt - K 2 | K - B 4 | |
| 5. Kt - B 3 | K - Kt 5 | |
| 6. K - Q 4 | K - R 4 | |
| 7. K - B 5 | K - R 3 | |
| 8. K - B 6 | K - R 2 | |
| 9. Kt - Q 5 | K - R 1 |
The first part is now over; the Black King is in the white-squared corner.
The second and last part will consist in driving the Black King now from Q R 8 to Q R 1 or K R 8 in order to mate him. Q R 1 will be the quickest in this position.
| 10. Kt - Kt 6 ch | K - R 2 | |
| 11. B - B 7 | K - R 3 | |
| 12. B - Kt 8 | K - R 4 | |
| 13. Kt - Q 5 | K - R 5 |