Unintentional

Ser-=5

Sentinelles*

2 sol.

1.g2-g4 2.g4-g5 3.g5-g6 4.g6*h7 5.h7-h8=G =

1.Gh1-h3 2.Gh3-h8[+wPh3] 3.h3-h4 4.Gh8-h6 5.Gh6-h3[+wPh6] =

* On moving, a piece leaves behind a Pawn of its own color on its departure square. The rule does not apply to Pawns, or to pieces moving from the 1st or 8th rank, nor does it apply if there are eight Pawns of that color already on the board.