Find The Shortest Mate

I didn't find this puzzle terribly difficult, but I think some might. Can you find the shortest mate?

K3R3/2N3pr/p5np/2Ppp3/B3k1P1/1PPprnB1/b2R1PQ1/7q w - - 0 1

Comments
No. 1-5
Yancey_Ward
Yancey_Ward

Editor

Alena's solution is the correct one.

Yancey_Ward
Yancey_Ward

Editor

Shamelin, 1.Bd7 Qh5 2.gh5 Rh8 pushes the mate beyond 4 moves- in fact, I think mate in 6 total is all this line accomplishes.

Alena
Alena

V-2

1.Bb5 Bb1
2.Bc6 Nf4
3.Nxd5 a5
4.Nf6#

V-3

1.Bb5 Qb1
2.Bd7 Ne7
3.Bf5+ Nxf5
4.Rxe5#

V-4

1.Bb5 Bxb3
2.Bxd3+ Rxd3
3.Re2+ Re3
4.Rxe3#

shamelin
shamelin
  1. Bd7 (threatening 2. Bf5#)
    a) if 1. …, Ne7/Nh4; 2. Bf5+, N:f5 (forced); 3. R:e5# (MATE IN 3!)
    b) if 1. …, Qh5; 2. g:h5! (still threatening 3. Bf5#), Ne7/Nh4; 3. Bf5+, N:f5 (forced); 4. R:e5#
Alena
Alena

V-1

1.Bb5 axb5
2.Nxb5 d4
3.c4 h5
4.Nd6#

I will consider another variations tomorrow.

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