| 14, | M a c1 | O b4 |
| 15, | P a3 | O c6 |
If O a6, then O a4. The position is now interesting. If White would try L b6; then Black would win by N e5:. White should now play O c6:† and then P f4, but forgetting the danger at h2, plays
| 16, | O d5:† | P d5: |
| 17, | M c6: | N e5: |
| 18, | M b6: |
The P d4 ought to have taken the N e5. The position is now—
12 + 10 = 22 pieces.
Black to play and mate in six (6) moves.
Solution.
| 18, | N h2:† | |
| 19, | K h1 | N d6† |
| 20, | K g1 | M h1† |
| 21, | K h1: | L h8† |
| 22, | N h6 | L h6:† |
| 23, | K g1 | L h2‡ |