user15543: What are the fastest possible games in which only all pieces and all pawns are captured? I did some searching myself.
Pieces Only
[Title "me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 13.5 Moves"]
[FEN ""]

1. e4 e5 2. d3 d5 3. Qg4 Qg5 4. Qxc8+ Ke7 5. Qxb8 Qxc1+ 6. Ke2 Qxb1 7. Qxa8 Qxa1 8. Qxf8+ Kd7 9. Qxg8 Qxf1+ 10. Kd2 Qxg1 11. Qxh8 Qxh1 12. Qe8+ Kxe8 13. d4 Qe1+ 14. Kxe1 

Pawns Only
[Title "me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 16.0 Moves"]
[FEN ""]

1. e4 e5 2. f4 f5 3. g4 g5 4. h4 h5 5. d4 d5 6. c4 c5 7. b4 b5 8. a4 a5 9. bxa5  bxa4 10. cxd5 cxd4 11. exf5 exf4 12. gxh5 gxh4 13. Rxh4 Rxh5 14. Rxa4 Rxa5 15.  Rxd4 Rxd5 16. Rhxf4 Rhxf5


user24424: Here is one for pieces only (12½ moves):
[FEN ""]

1. e3 e6 2. Na3 Na6 3. Bxa6 Bxa3 4. bxa3 bxa6 5. Qf3 Qf6 6. Qxa8 Qxa1 7. Qxc8+ Ke7 8. Qxg8 Qxc1+ 9. Ke2 Qxg1 10. Qxh8 Qxh1 11. h4 Qh3 12. Qf8+ Kxf8 13. gxh3  

Also see ħere

user15543: Thanks to @DM, I managed to beat off another move by opening with a pawn capture and having one less check. Sorry mate!
[Title "me, chess.stackexchange.com 3/3/2019, Non-Unique Proof Game In 10.0 Moves"]
[FEN ""]

1. e4 d5 exd5 Qxd5 Qh5 Qxa2 Qxh7 Qxb2 Qxg7 Rxh2 Rxa7 Rxg2 Rxb7 Rxf2 Rxc7 Rxd2 Rxe7+ Kd8 Qxf7 Qxc2


user12629: In the pawns only, you don't need to move so many pawns.  Getting the major pieces involved early seems to be fastest:
[FEN ""]

1.e4 c5 2.Qh5 Qa5 3.Qxh7 Qxa2 4.Qxg7 Qxb2 5.Rxa7 Rxh2 6.Rxb7 Rxg2 7.Rxd7 Rxf2 8.Rxe7+ Kd8 9.Qxf7 Rxd2 10.Qf5 Qxc2 11.Qxc5 Qxe4+  *

I was unable to find a faster version of the piece only.

15543: <p>What are the fastest possible games in which only all pieces and all pawns are captured? I did some searching myself.</p>
<p><strong>Pieces Only</strong></p>
<pre><code>[Title &quot;me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 13.5 Moves&quot;]
[FEN &quot;&quot;]

1. e4 e5 2. d3 d5 3. Qg4 Qg5 4. Qxc8+ Ke7 5. Qxb8 Qxc1+ 6. Ke2 Qxb1 7. Qxa8 Qxa1 8. Qxf8+ Kd7 9. Qxg8 Qxf1+ 10. Kd2 Qxg1 11. Qxh8 Qxh1 12. Qe8+ Kxe8 13. d4 Qe1+ 14. Kxe1 
</code></pre>
<p><strong>Pawns Only</strong></p>
<pre><code>[Title &quot;me, chess.stackexchange.com 3/2/2019, Non-Unique Proof Game In 16.0 Moves&quot;]
[FEN &quot;&quot;]

1. e4 e5 2. f4 f5 3. g4 g5 4. h4 h5 5. d4 d5 6. c4 c5 7. b4 b5 8. a4 a5 9. bxa5  bxa4 10. cxd5 cxd4 11. exf5 exf4 12. gxh5 gxh4 13. Rxh4 Rxh5 14. Rxa4 Rxa5 15.  Rxd4 Rxd5 16. Rhxf4 Rhxf5
</code></pre>
 24424: <p>Here is one for pieces only (12½ moves):</p>
<pre><code>[FEN &quot;&quot;]

1. e3 e6 2. Na3 Na6 3. Bxa6 Bxa3 4. bxa3 bxa6 5. Qf3 Qf6 6. Qxa8 Qxa1 7. Qxc8+ Ke7 8. Qxg8 Qxc1+ 9. Ke2 Qxg1 10. Qxh8 Qxh1 11. h4 Qh3 12. Qf8+ Kxf8 13. gxh3  
</code></pre>
<p>Also see <a href="https://puzzling.stackexchange.com/a/104183/70634">ħere</a></p>
 15543: <p>Thanks to @DM, I managed to beat off another move by opening with a pawn capture and having one less check. Sorry mate!</p>
<pre><code>[Title &quot;me, chess.stackexchange.com 3/3/2019, Non-Unique Proof Game In 10.0 Moves&quot;]
[FEN &quot;&quot;]

1. e4 d5 exd5 Qxd5 Qh5 Qxa2 Qxh7 Qxb2 Qxg7 Rxh2 Rxa7 Rxg2 Rxb7 Rxf2 Rxc7 Rxd2 Rxe7+ Kd8 Qxf7 Qxc2
</code></pre>
 12629: <p>In the pawns only, you don't need to move so many pawns.  Getting the major pieces involved early seems to be fastest:</p>

<pre><code>[FEN ""]

1.e4 c5 2.Qh5 Qa5 3.Qxh7 Qxa2 4.Qxg7 Qxb2 5.Rxa7 Rxh2 6.Rxb7 Rxg2 7.Rxd7 Rxf2 8.Rxe7+ Kd8 9.Qxf7 Rxd2 10.Qf5 Qxc2 11.Qxc5 Qxe4+  *
</code></pre>

<p>I was unable to find a faster version of the piece only.</p>
