Hehe, I just saw that the fourth move of White is 4.Kh4...
Okay then:
1.f3 e6 2. Kf2 Qf6 3. Kg3 Qxf3 +! 4. Kh4 Be7 # ðŸ™‚
Uff, that was rather exhausting...

Originally posted by BLReid He changed the original stipulation, the king moves 4. Kh4, which would be illegal if you had your Queen on the d8-h4 diagonal

Looking at the original problem, I thought whta if White play 1. d3 2. Kd2 3. Kc3 4. Kb4, however all my attempts to mate with Black fell short of one move. Interestingly enough, 1.d3 2.Kd2 3. Kc3. 4. Kd4 leads to mate in four moves (perhaps there's more than one solution to that)! Hehehe, I found that mental excercise quite enjoyable

Originally posted by ilywrin Looking at the original problem, I thought whta if White play 1. d3 2. Kd2 3. Kc3 4. Kb4, however all my attempts to mate with Black fell short of one move. Interestingly enough, [b]1.d3 2.Kd2 3. Kc3. 4. Kd4 leads to mate in four moves (perhaps there's more than one solution to that)! Hehehe, I found that mental excercise quite enjoyable[/b]

In this version, Black doesn't even have to wait for move 4.

1.d3 e6 2.Kd2 Qe7 3.Kc3 Qb4#

Or he can interpret the stipulation strictly and play

1.d3 f5 2.Kd2 e6 3.Kc3 Qe7 4.Kd4 Qc5#

I can't find a mate if white is allowed to play 4.Kb4 though.

BigDoggProblem you're correct. The mate I had in mind was 1.d3 Nf6 2.Kd2 e6 3. Kc3 Qe7 4.Kd4 Qc5, so there is obviously more than one solution. As for the 4.Kb4 variation, there can be no mate in four moves .
Okay, I'm reposting the solution to the original problem:
1.f3 e6 (or e5)2.Kf2 Qf6 3. Kg3 Qf3 4. Kh4 Be7 # Now after that loss, white recuperated and and announced that he will play for a direct king attack on the center 1.d4 2.Kd2 3. Ke3 4.Ke4 , a plan the devious Black refuted with another mate on the fourth move. How?