1 + 25

h#1+25

(Black makes one move, then White mates in 25 consecutive moves)

Anticirce*

Sol. Black: 1. Rh7; White: 1.a2-a4 2.a4-a5 3.a5-a6 4.a6*b7[wPb7->b2] 5.b2-b4 6.b4-b5 7.b5-b6 8.b6*c7[wPc7->c2] 9.c2-c4 10.c4-c5 11.c5-c6 12.c6*d7[wPd7->d2] 13.d2-d4 14.d4-d5 15.d5-d6 16.d6*e7[wPe7->e2] 17.e2-e4 18.e4-e5 19.e5-e6 20.e6*f7[wPf7->f2] 21.f2-f4 22.f4-f5 23.f5-f6 24.f6-f7 25.f7-f8=Q #

* On making a capture, any unit (including King) is reborn on its game-array square. The captured unit disappears, as in normal chess. Since rebirth is obligatory, a capture is legal only if the relevant rebirth-square is unoccupied.