Twins (or not)

Ser-h=6

Twin Kings

Sentinelles en Pion dverse

Sol. 1.  Kh3 (wPb2) 2. Kh4 (wPb3) 3. Kh5 (wPb4) 4. Kh6 (wPb5) 5. Kh7 (wPb6) 6. Kh8 (wPb7), f8=N =

This problem could be very simplified:

h=5

Sentinelles en pion adverse

No White King

1.Kh3-h4[+wPh3] f2-f4 2.Kh4-h5[+wPh4] f4-f5 3.Kh5-h6[+wPh5] f5-f6 4.Kh6-h7[+wPh6] f6-f7 5.Kh7-h8[+wPh7] f7-f8=S