Find The Shortest Mate

Can you find the unique shortest mate in this position. It took me over half an hour to find the thread this afternoon.

8/4p3/1B6/2N5/2k5/1R4K1/8/7B w - - 0 1

Comments (5)
No. 1-5
Yancey_Ward
Yancey_Ward

Editor

Well done, Illyrialady.

illyrialady
illyrialady

Pretty sure that the 1st move would be a king move, and wanting to avoid blocking the white-squared bishop with Kf3,
or subjecting the White king to a check by playing Kf4, I tried 1. Kg4. That gives a mate in 4.

  1. Kg4 Kd4
  2. Rd3+ Kc4
  3. Bd5+ Kb4 or Kb5
  4. Rb3#
  1. Kg4 Kd4
  2. Rd3+ Ke5
  3. Kg5 e6
  4. Bc7# or 4. Nd7#
  1. Kg4 e5
  2. Kf5 Kd4
  3. Nb7+ Kc4
  4. Na5#
  1. Kg4 e5
  2. Kf5 e4
  3. Ke5 e3
  4. Bd5#
  1. Kg4 e6
  2. Bc6 Kd4
  3. Rd3+ Ke5
  4. Nd7#
  1. Kg4 e6
  2. Bc6 e5
  3. Bb5+ Kd5 or Kd4
  4. Rd3#
Yancey_Ward
Yancey_Ward

Editor

Try again, Alena. That, of course, is a hint about the length.

Alena
Alena

V-2

1.Bc6 e5
2.Bb5+ Kd4
3.Rd3#

V-3

1.Bc6 e6
2.Kf3 Kd4
3.Ne4+ Ke5
4.Rb5#

V-4

1.Bc6 Kd4
2.Kf4 Kc4
3.Ke4 e5
4.Bd5#

Alena
Alena

At first I found mate in 6. Then I corrected my solution and got mate in 5.

1.Bc6! Kd4
2.Kf4 e5+
3.Kf5 e4
4.Nxe4+ Kc4
5.Nd2#



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