The K could not well move to f1, for the O would have checked at e3, and then taken the L.
| 19, | L g5 | |
| 20, | N b2 |
The N might have moved to f4, but then the black L would have taken the P g2, and won. Indeed, White’s game is hopeless, as the following diagram and the solution show:—
12 + 11 = 23 pieces.
Black to play and mate in eight (8) moves.
Solution.
| 20, | M f2:† | |
| 21, | K f2: |
If K d3, the mate follows in three more moves by L e3:, O b6, and P c5.
| 21, | L e3:† | |
| 22, | K f1 | M f8† |
| 23, | N f5 | M f5:† |
| 24, | L f3 | M f3:† |
| 25, | P f3: | L f3:† |
| 26, | K g1 | N c5† |
| 27, | N d4 | N d4:‡ |