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Copycat chess is back


Copycat Chess (Part 3/3)Copycat Chess (Part 2/3)Copycat Chess (Part 1/3)The Erasmus rook tourCan you stop the rambling rook?No More Kings puzzleGetting rid of all chess pieces (except the kings) in a sequence consisting only of capturesA Chess Puzzle in ReverseA Battle of Dysfunctional Kings (Chess)The Fastest Queen Trap (Chess)Loser Chess : another proof gameThe Chess 24 GameHow many total checkmates can you possibly make against the enemy king?













3












$begingroup$


This puzzle is inspired by and has similar rules to the series of puzzles by Sleafar.



Definition. A copycat chess opening is a sequence of moves starting from the conventional starting position, where every move by White (including the last one) is copied by Black identically, resulting in a symmetrical position with respect to the mid-horizontal axis. Every move must be legal, but the last move doesn't have to be checkmate, hence the name opening instead of game.




What is the shortest copycat chess opening in which a rook captures another rook?







chess







share|improve this question











$endgroup$











  • $begingroup$
    Does it need to be symmetrical up to the rook capture or after the rook capture?
    $endgroup$
    – Brandon_J
    21 mins ago










  • $begingroup$
    @Brandon_J every move, including the last one...
    $endgroup$
    – Arnaud Mortier
    13 mins ago
















3












$begingroup$


This puzzle is inspired by and has similar rules to the series of puzzles by Sleafar.



Definition. A copycat chess opening is a sequence of moves starting from the conventional starting position, where every move by White (including the last one) is copied by Black identically, resulting in a symmetrical position with respect to the mid-horizontal axis. Every move must be legal, but the last move doesn't have to be checkmate, hence the name opening instead of game.




What is the shortest copycat chess opening in which a rook captures another rook?







chess







share|improve this question











$endgroup$











  • $begingroup$
    Does it need to be symmetrical up to the rook capture or after the rook capture?
    $endgroup$
    – Brandon_J
    21 mins ago










  • $begingroup$
    @Brandon_J every move, including the last one...
    $endgroup$
    – Arnaud Mortier
    13 mins ago














3












3








3





$begingroup$


This puzzle is inspired by and has similar rules to the series of puzzles by Sleafar.



Definition. A copycat chess opening is a sequence of moves starting from the conventional starting position, where every move by White (including the last one) is copied by Black identically, resulting in a symmetrical position with respect to the mid-horizontal axis. Every move must be legal, but the last move doesn't have to be checkmate, hence the name opening instead of game.




What is the shortest copycat chess opening in which a rook captures another rook?







chess







share|improve this question











$endgroup$




This puzzle is inspired by and has similar rules to the series of puzzles by Sleafar.



Definition. A copycat chess opening is a sequence of moves starting from the conventional starting position, where every move by White (including the last one) is copied by Black identically, resulting in a symmetrical position with respect to the mid-horizontal axis. Every move must be legal, but the last move doesn't have to be checkmate, hence the name opening instead of game.




What is the shortest copycat chess opening in which a rook captures another rook?







chess




chess






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 6 mins ago







Arnaud Mortier

















asked 25 mins ago









Arnaud MortierArnaud Mortier

2,117725




2,117725











  • $begingroup$
    Does it need to be symmetrical up to the rook capture or after the rook capture?
    $endgroup$
    – Brandon_J
    21 mins ago










  • $begingroup$
    @Brandon_J every move, including the last one...
    $endgroup$
    – Arnaud Mortier
    13 mins ago

















  • $begingroup$
    Does it need to be symmetrical up to the rook capture or after the rook capture?
    $endgroup$
    – Brandon_J
    21 mins ago










  • $begingroup$
    @Brandon_J every move, including the last one...
    $endgroup$
    – Arnaud Mortier
    13 mins ago
















$begingroup$
Does it need to be symmetrical up to the rook capture or after the rook capture?
$endgroup$
– Brandon_J
21 mins ago




$begingroup$
Does it need to be symmetrical up to the rook capture or after the rook capture?
$endgroup$
– Brandon_J
21 mins ago












$begingroup$
@Brandon_J every move, including the last one...
$endgroup$
– Arnaud Mortier
13 mins ago





$begingroup$
@Brandon_J every move, including the last one...
$endgroup$
– Arnaud Mortier
13 mins ago











4 Answers
4






active

oldest

votes


















4












$begingroup$

How about seven moves each




1) p-a4 p-a5
2) p-b4 p-b5
3) p(b)xp pxp
4) p-a6 p-a3
5) p-a7 p-a2
6) pxN=R pxN=R
7) RxR RxR







share|improve this answer











$endgroup$












  • $begingroup$
    Yep :) not the shortest though.
    $endgroup$
    – Arnaud Mortier
    7 mins ago






  • 3




    $begingroup$
    @Arnaud Mortier How about now
    $endgroup$
    – Penguino
    6 mins ago


















3












$begingroup$

I hope this answer doesn't get sniped...




It did get sniped, but building off of @penguino's answer, we can cut the opening to just 7 moves:


1. a4 a5 2. b4 b5 3. bxa5 bxa4 4. a6 a3 5. a7 a2 6. axb8=R axb1=R 7. Rbxa8 Rxa1




Explanation:




We can't have one of white's rooks that's already on the board take one of black's rooks, since that move would not be copyable. Thus, the only other way to have a rook takes rook opening is pawn promotion. This quickly leads us to the pawns on the a- and b-files (or g- and h-files), and thus, the solution above.






share











$endgroup$












  • $begingroup$
    Yes you did :) +1 though.
    $endgroup$
    – Arnaud Mortier
    5 mins ago










  • $begingroup$
    Maybe if I added an explanation...
    $endgroup$
    – PiIsNot3
    3 mins ago


















1












$begingroup$

Could it be




1. h4 h5

2. g4 g5

3. hxg5 hxg4

4. Rxh8...?







share|improve this answer









$endgroup$








  • 1




    $begingroup$
    lol nice answer; beat me to it
    $endgroup$
    – Brandon_J
    15 mins ago










  • $begingroup$
    No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    @Brandon_J this entire puzzling experience has been very meta LOL
    $endgroup$
    – El-Guest
    14 mins ago






  • 2




    $begingroup$
    "I'm So Meta, Even This Acronym" - XKCD
    $endgroup$
    – Brandon_J
    12 mins ago



















0












$begingroup$

Here's




8 moves




lichess study




1. a4 a5 2. b4 b5 3. axb5 axb4 4. Nc3 Nc6 5. b6 b3 6. b7 b2 7. b8=R b1-R 8. Rxb1 Rxb8







share|improve this answer











$endgroup$












  • $begingroup$
    Think I just sniped you, friend!
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    Weeeelll, I'm late to the party again @ArnaudMortier
    $endgroup$
    – Brandon_J
    4 mins ago










  • $begingroup$
    @Brandon_J I hope you had fun anyway :)
    $endgroup$
    – Arnaud Mortier
    3 mins ago










  • $begingroup$
    I did. Thanks for the puzzle!
    $endgroup$
    – Brandon_J
    3 mins ago











Your Answer





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4 Answers
4






active

oldest

votes








4 Answers
4






active

oldest

votes









active

oldest

votes






active

oldest

votes









4












$begingroup$

How about seven moves each




1) p-a4 p-a5
2) p-b4 p-b5
3) p(b)xp pxp
4) p-a6 p-a3
5) p-a7 p-a2
6) pxN=R pxN=R
7) RxR RxR







share|improve this answer











$endgroup$












  • $begingroup$
    Yep :) not the shortest though.
    $endgroup$
    – Arnaud Mortier
    7 mins ago






  • 3




    $begingroup$
    @Arnaud Mortier How about now
    $endgroup$
    – Penguino
    6 mins ago















4












$begingroup$

How about seven moves each




1) p-a4 p-a5
2) p-b4 p-b5
3) p(b)xp pxp
4) p-a6 p-a3
5) p-a7 p-a2
6) pxN=R pxN=R
7) RxR RxR







share|improve this answer











$endgroup$












  • $begingroup$
    Yep :) not the shortest though.
    $endgroup$
    – Arnaud Mortier
    7 mins ago






  • 3




    $begingroup$
    @Arnaud Mortier How about now
    $endgroup$
    – Penguino
    6 mins ago













4












4








4





$begingroup$

How about seven moves each




1) p-a4 p-a5
2) p-b4 p-b5
3) p(b)xp pxp
4) p-a6 p-a3
5) p-a7 p-a2
6) pxN=R pxN=R
7) RxR RxR







share|improve this answer











$endgroup$



How about seven moves each




1) p-a4 p-a5
2) p-b4 p-b5
3) p(b)xp pxp
4) p-a6 p-a3
5) p-a7 p-a2
6) pxN=R pxN=R
7) RxR RxR








share|improve this answer














share|improve this answer



share|improve this answer








edited 6 mins ago

























answered 11 mins ago









PenguinoPenguino

7,1872168




7,1872168











  • $begingroup$
    Yep :) not the shortest though.
    $endgroup$
    – Arnaud Mortier
    7 mins ago






  • 3




    $begingroup$
    @Arnaud Mortier How about now
    $endgroup$
    – Penguino
    6 mins ago
















  • $begingroup$
    Yep :) not the shortest though.
    $endgroup$
    – Arnaud Mortier
    7 mins ago






  • 3




    $begingroup$
    @Arnaud Mortier How about now
    $endgroup$
    – Penguino
    6 mins ago















$begingroup$
Yep :) not the shortest though.
$endgroup$
– Arnaud Mortier
7 mins ago




$begingroup$
Yep :) not the shortest though.
$endgroup$
– Arnaud Mortier
7 mins ago




3




3




$begingroup$
@Arnaud Mortier How about now
$endgroup$
– Penguino
6 mins ago




$begingroup$
@Arnaud Mortier How about now
$endgroup$
– Penguino
6 mins ago











3












$begingroup$

I hope this answer doesn't get sniped...




It did get sniped, but building off of @penguino's answer, we can cut the opening to just 7 moves:


1. a4 a5 2. b4 b5 3. bxa5 bxa4 4. a6 a3 5. a7 a2 6. axb8=R axb1=R 7. Rbxa8 Rxa1




Explanation:




We can't have one of white's rooks that's already on the board take one of black's rooks, since that move would not be copyable. Thus, the only other way to have a rook takes rook opening is pawn promotion. This quickly leads us to the pawns on the a- and b-files (or g- and h-files), and thus, the solution above.






share











$endgroup$












  • $begingroup$
    Yes you did :) +1 though.
    $endgroup$
    – Arnaud Mortier
    5 mins ago










  • $begingroup$
    Maybe if I added an explanation...
    $endgroup$
    – PiIsNot3
    3 mins ago















3












$begingroup$

I hope this answer doesn't get sniped...




It did get sniped, but building off of @penguino's answer, we can cut the opening to just 7 moves:


1. a4 a5 2. b4 b5 3. bxa5 bxa4 4. a6 a3 5. a7 a2 6. axb8=R axb1=R 7. Rbxa8 Rxa1




Explanation:




We can't have one of white's rooks that's already on the board take one of black's rooks, since that move would not be copyable. Thus, the only other way to have a rook takes rook opening is pawn promotion. This quickly leads us to the pawns on the a- and b-files (or g- and h-files), and thus, the solution above.






share











$endgroup$












  • $begingroup$
    Yes you did :) +1 though.
    $endgroup$
    – Arnaud Mortier
    5 mins ago










  • $begingroup$
    Maybe if I added an explanation...
    $endgroup$
    – PiIsNot3
    3 mins ago













3












3








3





$begingroup$

I hope this answer doesn't get sniped...




It did get sniped, but building off of @penguino's answer, we can cut the opening to just 7 moves:


1. a4 a5 2. b4 b5 3. bxa5 bxa4 4. a6 a3 5. a7 a2 6. axb8=R axb1=R 7. Rbxa8 Rxa1




Explanation:




We can't have one of white's rooks that's already on the board take one of black's rooks, since that move would not be copyable. Thus, the only other way to have a rook takes rook opening is pawn promotion. This quickly leads us to the pawns on the a- and b-files (or g- and h-files), and thus, the solution above.






share











$endgroup$



I hope this answer doesn't get sniped...




It did get sniped, but building off of @penguino's answer, we can cut the opening to just 7 moves:


1. a4 a5 2. b4 b5 3. bxa5 bxa4 4. a6 a3 5. a7 a2 6. axb8=R axb1=R 7. Rbxa8 Rxa1




Explanation:




We can't have one of white's rooks that's already on the board take one of black's rooks, since that move would not be copyable. Thus, the only other way to have a rook takes rook opening is pawn promotion. This quickly leads us to the pawns on the a- and b-files (or g- and h-files), and thus, the solution above.







share













share


share








edited 52 secs ago

























answered 5 mins ago









PiIsNot3PiIsNot3

1,727124




1,727124











  • $begingroup$
    Yes you did :) +1 though.
    $endgroup$
    – Arnaud Mortier
    5 mins ago










  • $begingroup$
    Maybe if I added an explanation...
    $endgroup$
    – PiIsNot3
    3 mins ago
















  • $begingroup$
    Yes you did :) +1 though.
    $endgroup$
    – Arnaud Mortier
    5 mins ago










  • $begingroup$
    Maybe if I added an explanation...
    $endgroup$
    – PiIsNot3
    3 mins ago















$begingroup$
Yes you did :) +1 though.
$endgroup$
– Arnaud Mortier
5 mins ago




$begingroup$
Yes you did :) +1 though.
$endgroup$
– Arnaud Mortier
5 mins ago












$begingroup$
Maybe if I added an explanation...
$endgroup$
– PiIsNot3
3 mins ago




$begingroup$
Maybe if I added an explanation...
$endgroup$
– PiIsNot3
3 mins ago











1












$begingroup$

Could it be




1. h4 h5

2. g4 g5

3. hxg5 hxg4

4. Rxh8...?







share|improve this answer









$endgroup$








  • 1




    $begingroup$
    lol nice answer; beat me to it
    $endgroup$
    – Brandon_J
    15 mins ago










  • $begingroup$
    No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    @Brandon_J this entire puzzling experience has been very meta LOL
    $endgroup$
    – El-Guest
    14 mins ago






  • 2




    $begingroup$
    "I'm So Meta, Even This Acronym" - XKCD
    $endgroup$
    – Brandon_J
    12 mins ago
















1












$begingroup$

Could it be




1. h4 h5

2. g4 g5

3. hxg5 hxg4

4. Rxh8...?







share|improve this answer









$endgroup$








  • 1




    $begingroup$
    lol nice answer; beat me to it
    $endgroup$
    – Brandon_J
    15 mins ago










  • $begingroup$
    No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    @Brandon_J this entire puzzling experience has been very meta LOL
    $endgroup$
    – El-Guest
    14 mins ago






  • 2




    $begingroup$
    "I'm So Meta, Even This Acronym" - XKCD
    $endgroup$
    – Brandon_J
    12 mins ago














1












1








1





$begingroup$

Could it be




1. h4 h5

2. g4 g5

3. hxg5 hxg4

4. Rxh8...?







share|improve this answer









$endgroup$



Could it be




1. h4 h5

2. g4 g5

3. hxg5 hxg4

4. Rxh8...?








share|improve this answer












share|improve this answer



share|improve this answer










answered 16 mins ago









El-GuestEl-Guest

21.5k25092




21.5k25092







  • 1




    $begingroup$
    lol nice answer; beat me to it
    $endgroup$
    – Brandon_J
    15 mins ago










  • $begingroup$
    No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    @Brandon_J this entire puzzling experience has been very meta LOL
    $endgroup$
    – El-Guest
    14 mins ago






  • 2




    $begingroup$
    "I'm So Meta, Even This Acronym" - XKCD
    $endgroup$
    – Brandon_J
    12 mins ago













  • 1




    $begingroup$
    lol nice answer; beat me to it
    $endgroup$
    – Brandon_J
    15 mins ago










  • $begingroup$
    No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    @Brandon_J this entire puzzling experience has been very meta LOL
    $endgroup$
    – El-Guest
    14 mins ago






  • 2




    $begingroup$
    "I'm So Meta, Even This Acronym" - XKCD
    $endgroup$
    – Brandon_J
    12 mins ago








1




1




$begingroup$
lol nice answer; beat me to it
$endgroup$
– Brandon_J
15 mins ago




$begingroup$
lol nice answer; beat me to it
$endgroup$
– Brandon_J
15 mins ago












$begingroup$
No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
$endgroup$
– El-Guest
15 mins ago




$begingroup$
No idea if it’s right or not but that’s the first thing I thought of haha @Brandon_J
$endgroup$
– El-Guest
15 mins ago












$begingroup$
I think both of you forgot to read the rules: every move, including the last one... :)
$endgroup$
– Arnaud Mortier
14 mins ago




$begingroup$
I think both of you forgot to read the rules: every move, including the last one... :)
$endgroup$
– Arnaud Mortier
14 mins ago












$begingroup$
@Brandon_J this entire puzzling experience has been very meta LOL
$endgroup$
– El-Guest
14 mins ago




$begingroup$
@Brandon_J this entire puzzling experience has been very meta LOL
$endgroup$
– El-Guest
14 mins ago




2




2




$begingroup$
"I'm So Meta, Even This Acronym" - XKCD
$endgroup$
– Brandon_J
12 mins ago





$begingroup$
"I'm So Meta, Even This Acronym" - XKCD
$endgroup$
– Brandon_J
12 mins ago












0












$begingroup$

Here's




8 moves




lichess study




1. a4 a5 2. b4 b5 3. axb5 axb4 4. Nc3 Nc6 5. b6 b3 6. b7 b2 7. b8=R b1-R 8. Rxb1 Rxb8







share|improve this answer











$endgroup$












  • $begingroup$
    Think I just sniped you, friend!
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    Weeeelll, I'm late to the party again @ArnaudMortier
    $endgroup$
    – Brandon_J
    4 mins ago










  • $begingroup$
    @Brandon_J I hope you had fun anyway :)
    $endgroup$
    – Arnaud Mortier
    3 mins ago










  • $begingroup$
    I did. Thanks for the puzzle!
    $endgroup$
    – Brandon_J
    3 mins ago















0












$begingroup$

Here's




8 moves




lichess study




1. a4 a5 2. b4 b5 3. axb5 axb4 4. Nc3 Nc6 5. b6 b3 6. b7 b2 7. b8=R b1-R 8. Rxb1 Rxb8







share|improve this answer











$endgroup$












  • $begingroup$
    Think I just sniped you, friend!
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    Weeeelll, I'm late to the party again @ArnaudMortier
    $endgroup$
    – Brandon_J
    4 mins ago










  • $begingroup$
    @Brandon_J I hope you had fun anyway :)
    $endgroup$
    – Arnaud Mortier
    3 mins ago










  • $begingroup$
    I did. Thanks for the puzzle!
    $endgroup$
    – Brandon_J
    3 mins ago













0












0








0





$begingroup$

Here's




8 moves




lichess study




1. a4 a5 2. b4 b5 3. axb5 axb4 4. Nc3 Nc6 5. b6 b3 6. b7 b2 7. b8=R b1-R 8. Rxb1 Rxb8







share|improve this answer











$endgroup$



Here's




8 moves




lichess study




1. a4 a5 2. b4 b5 3. axb5 axb4 4. Nc3 Nc6 5. b6 b3 6. b7 b2 7. b8=R b1-R 8. Rxb1 Rxb8








share|improve this answer














share|improve this answer



share|improve this answer








edited 5 mins ago

























answered 16 mins ago









Brandon_JBrandon_J

3,538244




3,538244











  • $begingroup$
    Think I just sniped you, friend!
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    Weeeelll, I'm late to the party again @ArnaudMortier
    $endgroup$
    – Brandon_J
    4 mins ago










  • $begingroup$
    @Brandon_J I hope you had fun anyway :)
    $endgroup$
    – Arnaud Mortier
    3 mins ago










  • $begingroup$
    I did. Thanks for the puzzle!
    $endgroup$
    – Brandon_J
    3 mins ago
















  • $begingroup$
    Think I just sniped you, friend!
    $endgroup$
    – El-Guest
    15 mins ago










  • $begingroup$
    I think both of you forgot to read the rules: every move, including the last one... :)
    $endgroup$
    – Arnaud Mortier
    14 mins ago










  • $begingroup$
    Weeeelll, I'm late to the party again @ArnaudMortier
    $endgroup$
    – Brandon_J
    4 mins ago










  • $begingroup$
    @Brandon_J I hope you had fun anyway :)
    $endgroup$
    – Arnaud Mortier
    3 mins ago










  • $begingroup$
    I did. Thanks for the puzzle!
    $endgroup$
    – Brandon_J
    3 mins ago















$begingroup$
Think I just sniped you, friend!
$endgroup$
– El-Guest
15 mins ago




$begingroup$
Think I just sniped you, friend!
$endgroup$
– El-Guest
15 mins ago












$begingroup$
I think both of you forgot to read the rules: every move, including the last one... :)
$endgroup$
– Arnaud Mortier
14 mins ago




$begingroup$
I think both of you forgot to read the rules: every move, including the last one... :)
$endgroup$
– Arnaud Mortier
14 mins ago












$begingroup$
Weeeelll, I'm late to the party again @ArnaudMortier
$endgroup$
– Brandon_J
4 mins ago




$begingroup$
Weeeelll, I'm late to the party again @ArnaudMortier
$endgroup$
– Brandon_J
4 mins ago












$begingroup$
@Brandon_J I hope you had fun anyway :)
$endgroup$
– Arnaud Mortier
3 mins ago




$begingroup$
@Brandon_J I hope you had fun anyway :)
$endgroup$
– Arnaud Mortier
3 mins ago












$begingroup$
I did. Thanks for the puzzle!
$endgroup$
– Brandon_J
3 mins ago




$begingroup$
I did. Thanks for the puzzle!
$endgroup$
– Brandon_J
3 mins ago

















draft saved

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