Answers.Body: <p>It's a mate in 6. (EDIT: I was reminded Black is to move, but it is still #6 on any defense, if I checked correctly.) Stockfish can tell you, and any problem chess program can tell you exactly. For the lulz, here is the complete output of &quot;Popeye&quot; with the threat (White to move). tl;dr: Only 1.e4 mates in 6, which I remembered correctly, since this is a well-known chess problem.</p>
  <pre><code>   1.e2-e4 ! threat:
        2.Qd1-g4 threat:
                3.Qg4-g7 threat:
                        4.Bf1-b5 +
                            4...Ke8-d8
                                5.Qg7-d7 #
                    3...Ke8-d8
                        4.Bf1-a6 zugzwang.
                            4...Kd8-e8
                                5.Ba6-b5 +
                                    5...Ke8-d8
                                        6.Qg7-d7 #
                                5.Ba6-c8 zugzwang.
                                    5...Ke8-d8
                                        6.Qg7-d7 #
                        4.Bf1-b5 threat:
                                5.Qg7-d7 #
                            4...Kd8-c8
                                5.Bb5-c6 zugzwang.
                                    5...Kc8-b8
                                        6.Qg7-b7 #
                                    5...Kc8-d8
                                        6.Qg7-d7 #
                                5.Qg7-a7 zugzwang.
                                    5...Kc8-d8
                                        6.Qa7-d7 #
            2...Ke8-f7
                3.Qg4-d7 +
                    3...Kf7-g6
                        4.d2-d4 threat:
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                            4...Kg6-h5
                                5.Bf1-c4 zugzwang.
                                    5...Kh5-g6
                                        6.Qd7-f7 #
                                    5...Kh5-h4
                                        6.Qd7-h3 #
                                5.Qd7-f5 +
                                    5...Kh5-h4
                                        6.Qf5-h3 #
                                        6.Qf5-g5 #
                                        6.g2-g3 #
                                        6.Sg1-f3 #
                                5.Qd7-e6 zugzwang.
                                    5...Kh5-h4
                                        6.Qe6-h3 #
                                5.Qd7-h7 +
                                    5...Kh5-g4
                                        6.Qh7-h3 #
                                        6.h2-h3 #
                                        6.f2-f3 #
                                        6.Bf1-e2 #
                                5.Qd7-g7 threat:
                                        6.Qg7-g5 #
                            4...Kg6-f6
                                5.Bf1-c4 threat:
                                        6.Qd7-f7 #
                    3...Kf7-g8
                        4.b2-b4 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.b2-b3 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.d2-d4 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                    3...Kf7-f6
                        4.d2-d4 threat:
                                5.Bf1-c4 threat:
                                        6.Qd7-f7 #
                            4...Kf6-g6
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                        4.d2-d3 zugzwang.
                            4...Kf6-e5
                                5.Qd7-c6 threat:
                                        6.Sg1-f3 #
                                5.Qd7-e7 +
                                    5...Ke5-d4
                                        6.Qe7-d6 #
                                        6.c2-c3 #
                                        6.Sg1-f3 #
                                        6.Sg1-e2 #
                                        6.Bc1-e3 #
                            4...Kf6-g6
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                    3...Kf7-f8
                        4.Sg1-h3 zugzwang.
                            4...Kf8-g8
                                5.Sh3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.Sg1-f3 zugzwang.
                            4...Kf8-g8
                                5.Sf3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.b2-b4 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.b2-b3 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.d2-d4 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
            2...Ke8-f8
                3.Bf1-b5 zugzwang.
                    3...Kf8-e7
                        4.Qg4-g6 zugzwang.
                            4...Ke7-f8
                                5.e4-e5 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                            4...Ke7-d8
                                5.Qg6-d6 +
                                    5...Kd8-c8
                                        6.Bb5-a6 #
                    3...Kf8-f7
                        4.e4-e5 zugzwang.
                            4...Kf7-e7
                                5.Qg4-f5 threat:
                                        6.Qf5-f6 #
                                    5...Ke7-d8
                                        6.Qf5-d7 #
                            4...Kf7-f8
                                5.Qg4-g6 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                3.Qg4-d7 threat:
                        4.Sg1-h3 zugzwang.
                            4...Kf8-g8
                                5.Sh3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.Sg1-f3 zugzwang.
                            4...Kf8-g8
                                5.Sf3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.b2-b4 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.b2-b3 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.d2-d4 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                    3...Kf8-g8
                        4.b2-b4 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.b2-b3 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.d2-d4 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                3.Qg4-e6 threat:
                        4.Bf1-c4 threat:
                                5.Qe6-f7 #
                            4...Kf8-g7
                                5.d2-d4 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                                5.d2-d3 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                                5.Qe6-f7 +
                                    5...Kg7-h6
                                        6.d2-d4 #
                                        6.d2-d3 #
                                    5...Kg7-h8
                                        6.Qf7-g8 #
                        4.d2-d4 threat:
                                5.Bc1-h6 #
                            4...Kf8-g7
                                5.Bf1-c4 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                3.Qg4-g6 zugzwang.
                    3...Kf8-e7
                        4.Bf1-b5 zugzwang.
                            4...Ke7-f8
                                5.e4-e5 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                            4...Ke7-d8
                                5.Qg6-d6 +
                                    5...Kd8-c8
                                        6.Bb5-a6 #
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-04-08T01:38:26.207Z
Answers.Text: OP says it is black to move.
Answers.UserDisplayName: L. Scott Johnson
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-04-08T07:30:04.067Z
Answers.Text: @L.ScottJohnson: Oops, overlooked that. Doesn't change anything relevant except the n in n#, though :-)
Answers.UserDisplayName: Hauke Reddmann
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-04-07T18:56:31.780Z
Answers.LastActivityDate: 2022-04-08T07:58:19.247Z
Answers.LastEditDate: 2022-04-08T07:58:19.247Z
Answers.UserDisplayName: Hauke Reddmann
Body: <p><a href="https://i.sstatic.net/ErniZ.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/ErniZ.png" alt="enter image description here" /></a></p>
  <p>From the above position, black player lost (by mistakes) all of its pieces after his 15th move. How many more moves shall the black king have before it is checkmated by white if it is black' move?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-04-08T00:28:35.670Z
Comments.Text: you can easily just check stockfish analysis :/
Comments.UserDisplayName: DialFrost
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-04-08T01:37:39.127Z
Comments.Text: Stockfish gives mate in 7: "1... Kf7 2. e4 Ke6 3. d4 Kf7 4. Qh5+ Ke6 5. Qh7 Kd6 6. Bf4+ Ke6 7. d5+ Kf6 8. e5#"
Comments.UserDisplayName: L. Scott Johnson
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-04-08T10:19:44.013Z
Comments.Text: It is not possible to reach this position in 15 moves.
Comments.UserDisplayName: Étienne
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-04-08T11:41:14.473Z
Comments.Text: @Étienne OP probably conflated "had 15 pieces captured" with 15 moves.
Comments.UserDisplayName: L. Scott Johnson
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-04-08T16:24:12.927Z
Comments.Text: @Étienne-there are lines that this position was reached. Its black's 16th move
Comments.UserDisplayName: TSLF
Tags: <checkmate>
Title: How many moves to checkmate in the initial position with all Black pieces captured?
ThreadText: # How many moves to checkmate in the initial position with all Black pieces captured?
  
  (Asked by: username_0 on 2022-04-07)
  
  [![enter image description here](https://i.sstatic.net/ErniZ.png)](https://i.sstatic.net/ErniZ.png)
  
  From the above position, black player lost (by mistakes) all of its pieces after his 15th move. How many more moves shall the black king have before it is checkmated by white if it is black' move?
  
  **Tags:** checkmate
  
  > **Comments:**
  > **username_1**: you can easily just check stockfish analysis :/  
  > **username_2**: Stockfish gives mate in 7: "1... Kf7 2. e4 Ke6 3. d4 Kf7 4. Qh5+ Ke6 5. Qh7 Kd6 6. Bf4+ Ke6 7. d5+ Kf6 8. e5#"  
  > **username_3**: It is not possible to reach this position in 15 moves.  
  > **username_2**: @username_3 OP probably conflated "had 15 pieces captured" with 15 moves.  
  > **username_0**: @username_3-there are lines that this position was reached. Its black's 16th move  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_4 on 2022-04-07. Score: 1
  
  It's a mate in 6. (EDIT: I was reminded Black is to move, but it is still #6 on any defense, if I checked correctly.) Stockfish can tell you, and any problem chess program can tell you exactly. For the lulz, here is the complete output of "Popeye" with the threat (White to move). tl;dr: Only 1.e4 mates in 6, which I remembered correctly, since this is a well-known chess problem.
  
  ```
     1.e2-e4 ! threat:
        2.Qd1-g4 threat:
                3.Qg4-g7 threat:
                        4.Bf1-b5 +
                            4...Ke8-d8
                                5.Qg7-d7 #
                    3...Ke8-d8
                        4.Bf1-a6 zugzwang.
                            4...Kd8-e8
                                5.Ba6-b5 +
                                    5...Ke8-d8
                                        6.Qg7-d7 #
                                5.Ba6-c8 zugzwang.
                                    5...Ke8-d8
                                        6.Qg7-d7 #
                        4.Bf1-b5 threat:
                                5.Qg7-d7 #
                            4...Kd8-c8
                                5.Bb5-c6 zugzwang.
                                    5...Kc8-b8
                                        6.Qg7-b7 #
                                    5...Kc8-d8
                                        6.Qg7-d7 #
                                5.Qg7-a7 zugzwang.
                                    5...Kc8-d8
                                        6.Qa7-d7 #
            2...Ke8-f7
                3.Qg4-d7 +
                    3...Kf7-g6
                        4.d2-d4 threat:
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                            4...Kg6-h5
                                5.Bf1-c4 zugzwang.
                                    5...Kh5-g6
                                        6.Qd7-f7 #
                                    5...Kh5-h4
                                        6.Qd7-h3 #
                                5.Qd7-f5 +
                                    5...Kh5-h4
                                        6.Qf5-h3 #
                                        6.Qf5-g5 #
                                        6.g2-g3 #
                                        6.Sg1-f3 #
                                5.Qd7-e6 zugzwang.
                                    5...Kh5-h4
                                        6.Qe6-h3 #
                                5.Qd7-h7 +
                                    5...Kh5-g4
                                        6.Qh7-h3 #
                                        6.h2-h3 #
                                        6.f2-f3 #
                                        6.Bf1-e2 #
                                5.Qd7-g7 threat:
                                        6.Qg7-g5 #
                            4...Kg6-f6
                                5.Bf1-c4 threat:
                                        6.Qd7-f7 #
                    3...Kf7-g8
                        4.b2-b4 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.b2-b3 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.d2-d4 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                    3...Kf7-f6
                        4.d2-d4 threat:
                                5.Bf1-c4 threat:
                                        6.Qd7-f7 #
                            4...Kf6-g6
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                        4.d2-d3 zugzwang.
                            4...Kf6-e5
                                5.Qd7-c6 threat:
                                        6.Sg1-f3 #
                                5.Qd7-e7 +
                                    5...Ke5-d4
                                        6.Qe7-d6 #
                                        6.c2-c3 #
                                        6.Sg1-f3 #
                                        6.Sg1-e2 #
                                        6.Bc1-e3 #
                            4...Kf6-g6
                                5.Qd7-e7 zugzwang.
                                    5...Kg6-h5
                                        6.Qe7-g5 #
                    3...Kf7-f8
                        4.Sg1-h3 zugzwang.
                            4...Kf8-g8
                                5.Sh3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.Sg1-f3 zugzwang.
                            4...Kf8-g8
                                5.Sf3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.b2-b4 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.b2-b3 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.d2-d4 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
            2...Ke8-f8
                3.Bf1-b5 zugzwang.
                    3...Kf8-e7
                        4.Qg4-g6 zugzwang.
                            4...Ke7-f8
                                5.e4-e5 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                            4...Ke7-d8
                                5.Qg6-d6 +
                                    5...Kd8-c8
                                        6.Bb5-a6 #
                    3...Kf8-f7
                        4.e4-e5 zugzwang.
                            4...Kf7-e7
                                5.Qg4-f5 threat:
                                        6.Qf5-f6 #
                                    5...Ke7-d8
                                        6.Qf5-d7 #
                            4...Kf7-f8
                                5.Qg4-g6 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                3.Qg4-d7 threat:
                        4.Sg1-h3 zugzwang.
                            4...Kf8-g8
                                5.Sh3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.Sg1-f3 zugzwang.
                            4...Kf8-g8
                                5.Sf3-g5 zugzwang.
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Qd7-h7 #
                        4.b2-b4 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.b2-b3 threat:
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kf8-g8
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                        4.d2-d4 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 +
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                    3...Kf8-g8
                        4.b2-b4 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.b2-b3 threat:
                                5.Bf1-c4 +
                                    5...Kg8-f8
                                        6.Qd7-f7 #
                                        6.Bc1-a3 #
                                    5...Kg8-h8
                                        6.Bc1-b2 #
                            4...Kg8-f8
                                5.Bc1-b2 zugzwang.
                                    5...Kf8-g8
                                        6.Qd7-g7 #
                            4...Kg8-h8
                                5.Bc1-b2 +
                                    5...Kh8-g8
                                        6.Qd7-g7 #
                        4.d2-d4 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                        4.d2-d3 threat:
                                5.Bc1-h6 threat:
                                        6.Qd7-g7 #
                3.Qg4-e6 threat:
                        4.Bf1-c4 threat:
                                5.Qe6-f7 #
                            4...Kf8-g7
                                5.d2-d4 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                                5.d2-d3 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                                5.Qe6-f7 +
                                    5...Kg7-h6
                                        6.d2-d4 #
                                        6.d2-d3 #
                                    5...Kg7-h8
                                        6.Qf7-g8 #
                        4.d2-d4 threat:
                                5.Bc1-h6 #
                            4...Kf8-g7
                                5.Bf1-c4 threat:
                                        6.Qe6-h6 #
                                    5...Kg7-f8
                                        6.Qe6-f7 #
                                        6.Bc1-h6 #
                3.Qg4-g6 zugzwang.
                    3...Kf8-e7
                        4.Bf1-b5 zugzwang.
                            4...Ke7-f8
                                5.e4-e5 zugzwang.
                                    5...Kf8-e7
                                        6.Qg6-e8 #
                                        6.Qg6-f6 #
                            4...Ke7-d8
                                5.Qg6-d6 +
                                    5...Kd8-c8
                                        6.Bb5-a6 #
  
  ```
  
  > **Comments:**
  > **username_2**: OP says it is black to move.  
  > **username_4**: @username_2: Oops, overlooked that. Doesn't change anything relevant except the n in n#, though :-)  
  
  ---
  
  