A Challenge for you I: Mate_on_f7 edition (Inspired by @nyeh-heh-heh)

Rules:
1. Black moves first
2. White forces checkmate in 5 moves
3. The checkmate is on f7
4. Variant: NORMAL CHESS

There will be a point system for solvers :) The award for this one: 4 Challenge Points for first solver, 1 for everyone else (I do not count as solver :)
THE POSITION HAS TO BE LEGAL!!!

Poor

Very poor

So poor

@Mate_On_f7 Awesome puzzle 👏
Here's my board: lichess.org/editor/rnbqknR1/pbpnnbRp/5pp1/3B1bp1/B1B5/1B2Rb2/BPPP1PPP/R4RK1_b_Qq_-_0_1
Yeah, it's a little unrealistic (5 Bishops) but it satisfies all the requirements.

Here's the solution: lichess.org/study/UO5YFMEv

must it be exactly 5 moves or up to 5 moves?

not a possible position. four light squared bishops must have promoted, so at most 8-4=4 pawns for white, yet 6 in your answer.

lets try then

Interesting.

lichess.org/analysis/2b1k3/3pP3/p1pP4/PpP1N3/1P6/5K2/5P2/8_b_-_-_0_1

1. Ke2 2. f4 3. f5 4. f6 5. f7#

Here's mine:

lichess.org/editor/rn2k3/pbp2p1p/7p/b3N2B/4P3/B1P5/P2R2PP/5R1K_b_q_-_0_1