Q7/1K6/R7/8/4P3/8/6pp/7k w - - 0 1

# Find The Shortest Mate

How quickly can you find the shortest mate in this position? I found the first move eay, but it was harder after that.

Comments

No. 1-2

At last I guessed how to mate in 3.

V-1

1.Qf8 g1=Q

2.Qf3+ Qg2

3.Ra1#

V-2

1.Qf8 g1=N

2.Rg6! Ne2

3.Qf3#

V-1

1.e5 Kg1

2.Qa7+ Kf1

3.Ra2 g1=Q

4.Qa6+ Ke1

5.Qe2#

V-2

1.e5 Kg1

2.Qa7+ Kh1

3.Qe3 g1=Q

4.Qf3+ Qg2

5.Ra1#

V-3

1.e5 g1=Q

2.Kc7+ Qg2

3.Ra1#

V-4

1.e5 Kg1

2.Qa7+ Kh1

3.Qe3 g1=N

4.Rg6 any move

5.Qf3#

I think it isn't the shortest mate. I will think further.