Three's a Crowd

h=3

Sentinelles*

No White King

1.Kh4-h5[+bPh4] Se1-f3 2.h4-h3 Sf3-h2[+wPf3] 3.Kh5-h4[+bPh5] Sh2-f1[+wPh2] =

* When a piece (not a Pawn) moves, a Pawn of the same colour appears on the vacated square, if it is not the first or the last rank, and if there are less than 8 Pawns of that colour on the board.