Answers.Body: <p>Improved set-up:</p>
  <p>Stockfish gives this one #-13:</p>
  <pre><code>[Title &quot;Mate in 13&quot;]
  [FEN &quot;rnbqkbnr/qqppppqq/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1&quot;]
  
  1.d4 Qgxd4 2.e3 Qxd1+ 3.Kxd1 Qc5 4.Nc3 Qd6+ 5.Ke1 Qxc2 6.Nge2 Qbxb2 7.f3 Qcd2+ 8.Bxd2 Qdxd2+ 9.Kf2 Qbxc3 10.h4 Qdxe3+ 11.Kg3 Qg7+ 12.Kh3 Rxh4+ 13.Kxh4 Qeh6#
  </code></pre>
  <p>Original Mate in 9 (multiple lines):</p>
  <pre><code>[FEN &quot;rnbqkbnr/pqppqqqp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1&quot;]
  
  1. Nh3 Qbxg2 2. Bxg2 Qxg2 3. Rf1 Qh4 4. d3 Qxf1+ 5. Kxf1 Qxh3+ 6. Ke1 Qxf2+ 7. Kxf2 Qdh4+ 8. Kg1 Qxh2+ 9. Kf1 Qh1#
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T16:43:18.967Z
Answers.Text: How about this line: My stockfish says mate-in-14 (at depth 36): [Variant "From Position"]
  [FEN "rnbqkbnr/qqppppqq/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1. e3 Qbxg2 2. Bxg2 Qxg2 3. Nc3 Qxh1 4. Ne2 Q7xh2 5. d4 Qa5+ 6. c3 Q1xg1+ 7. Nxg1 Qxg1+ 8. Kd2 Qxf2+ 9. Qe2 Qxe2+ 10. Kxe2 Rh2+ 11. Kd3 Qf5+ 12. Kc4 Ba6+ 13. Kb3 Qb5+ 14. Ka3 Bb7#
Answers.UserDisplayName: L. Scott Johnson
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T16:46:04.567Z
Answers.Text: I'm not sure if I should edit my answer to switch to the new position or create a new answer.
Answers.UserDisplayName: L. Scott Johnson
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T16:47:09.770Z
Answers.Text: @L.ScottJohnson: Edit, keep the #9 and write the #14 below it, marked "Update".
Answers.UserDisplayName: Hauke Reddmann
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T17:00:55.017Z
Answers.Text: @SecretAgentMan are you picking white's first move or are you letting Stockfish evaluate from the starting position?
Answers.UserDisplayName: L. Scott Johnson
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T17:50:10.433Z
Answers.Text: I think the issue is simply that it is White's move.  So the engine if providing the best line for White, hence your original position really was a Mate in 9 in the since that the best White can achieve is delaying checkmate by 1 move (vs the mate in 8 lines).
Answers.UserDisplayName: SecretAgentMan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T18:30:12.743Z
Answers.Text: Yeah, I've edited that in. Stockfish eventually found that around depth 45. Thanks.
Answers.UserDisplayName: L. Scott Johnson
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-02-23T12:41:56.090Z
Answers.LastActivityDate: 2022-02-23T18:34:25.560Z
Answers.LastEditDate: 2022-02-23T18:34:25.560Z
Answers.UserDisplayName: L. Scott Johnson
Body: <p>Just plain silly.</p>
  <p>Replace all pieces of Black (except the king — you are not Chuck Norris, you must have one) with queens. The starting position is then a Mate in 3 (#3).</p>
  <p>Challenge: Replace only a few Black pieces with queens such that Lichess (or your favorite engine) shows a forced mate in <em>n</em>, with <em>n</em> as high as possible. Of course, it is always a forced mate in a higher sense, since already replacing a rook is -7. For the record, I managed a #6.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-02-23T01:47:41.190Z
Comments.Text: The problem with the puzzle is that for any large n you're going to be sitting there a long time waiting for Stockfish. I got a #9 but at depth 35 it hadn't found it yet (the 4 queen sacs probably make it think the line isn't worth looking at.) I feel like I'd have to download a dedicated mate solver to go much higher (and even then, all the queen moves would likely slow it down.)
Comments.UserDisplayName: D M
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-02-23T08:28:47.360Z
Comments.Text: @DM: Yes, I foresaw this problem (and was reluctant to post the question). Feel free to post the #9 anyway. (>SecretagentMan: Naturally #6 by Black :-)
Comments.UserDisplayName: Hauke Reddmann
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-02-23T20:02:05.410Z
Comments.Text: What does "*a few*" mean in "*Replace only a few Black pieces...*?
Comments.UserDisplayName: SecretAgentMan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-02-24T09:05:32.540Z
Comments.Text: @SecretAgentMan: A few (of 14 possible) :-) (Specifically, a7 b7 e7 f7 f8 replaced by Q suffices for a #5. This also would be an interesting question: How many replaced pieces suffice for a forced mate inside some defined horizon? I wasn't able to make 4 work, but see answer - 4 also suffice.)
Comments.UserDisplayName: Hauke Reddmann
Tags: <problems><chess-variants>
Title: Chess against Chuck Norris (starting position with lots of queens)
ThreadText: # Chess against Chuck Norris (starting position with lots of queens)
  
  (Asked by: username_0 on 2022-02-22)
  
  Just plain silly.
  
  Replace all pieces of Black (except the king — you are not Chuck Norris, you must have one) with queens. The starting position is then a Mate in 3 (#3).
  
  Challenge: Replace only a few Black pieces with queens such that Lichess (or your favorite engine) shows a forced mate in *n*, with *n* as high as possible. Of course, it is always a forced mate in a higher sense, since already replacing a rook is -7. For the record, I managed a #6.
  
  **Tags:** problems, chess-variants
  
  > **Comments:**
  > **username_1**: The problem with the puzzle is that for any large n you're going to be sitting there a long time waiting for Stockfish. I got a #9 but at depth 35 it hadn't found it yet (the 4 queen sacs probably make it think the line isn't worth looking at.) I feel like I'd have to download a dedicated mate solver to go much higher (and even then, all the queen moves would likely slow it down.)  
  > **username_0**: @DM: Yes, I foresaw this problem (and was reluctant to post the question). Feel free to post the #9 anyway. (>SecretagentMan: Naturally #6 by Black :-)  
  > **username_2**: What does "*a few*" mean in "*Replace only a few Black pieces...*?  
  > **username_0**: @username_2: A few (of 14 possible) :-) (Specifically, a7 b7 e7 f7 f8 replaced by Q suffices for a #5. This also would be an interesting question: How many replaced pieces suffice for a forced mate inside some defined horizon? I wasn't able to make 4 work, but see answer - 4 also suffice.)  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_3 on 2022-02-23. Score: 3 | Accepted answer
  
  Improved set-up:
  Stockfish gives this one #-13:
  [Title "Mate in 13"]
  [FEN "rnbqkbnr/qqppppqq/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1.d4 Qgxd4 2.e3 Qxd1+ 3.Kxd1 Qc5 4.Nc3 Qd6+ 5.Ke1 Qxc2 6.Nge2 Qbxb2 7.f3 Qcd2+ 8.Bxd2 Qdxd2+ 9.Kf2 Qbxc3 10.h4 Qdxe3+ 11.Kg3 Qg7+ 12.Kh3 Rxh4+ 13.Kxh4 Qeh6#
  
  Original Mate in 9 (multiple lines):
  [FEN "rnbqkbnr/pqppqqqp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
  
  1. Nh3 Qbxg2 2. Bxg2 Qxg2 3. Rf1 Qh4 4. d3 Qxf1+ 5. Kxf1 Qxh3+ 6. Ke1 Qxf2+ 7. Kxf2 Qdh4+ 8. Kg1 Qxh2+ 9. Kf1 Qh1#
  
  > **Comments:**
  > **username_3**: How about this line: My stockfish says mate-in-14 (at depth 36): [Variant "From Position"] [FEN "rnbqkbnr/qqppppqq/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]  1. e3 Qbxg2 2. Bxg2 Qxg2 3. Nc3 Qxh1 4. Ne2 Q7xh2 5. d4 Qa5+ 6. c3 Q1xg1+ 7. Nxg1 Qxg1+ 8. Kd2 Qxf2+ 9. Qe2 Qxe2+ 10. Kxe2 Rh2+ 11. Kd3 Qf5+ 12. Kc4 Ba6+ 13. Kb3 Qb5+ 14. Ka3 Bb7#  
  > **username_3**: I'm not sure if I should edit my answer to switch to the new position or create a new answer.  
  > **username_0**: @L.ScottJohnson: Edit, keep the #9 and write the #14 below it, marked "Update".  
  > **username_3**: @username_2 are you picking white's first move or are you letting Stockfish evaluate from the starting position?  
  > **username_2**: I think the issue is simply that it is White's move.  So the engine if providing the best line for White, hence your original position really was a Mate in 9 in the since that the best White can achieve is delaying checkmate by 1 move (vs the mate in 8 lines).  
  > **username_3**: Yeah, I've edited that in. Stockfish eventually found that around depth 45. Thanks.  
  
  ---
  
  