# Construct your own retro #3

David113
Posers and Puzzles 13 Nov '06 22:42
1. 13 Nov '06 22:42
Find a position with 8 pieces or less, where no king is in check, it is not given who moved last, but it is still possible to conclude what was the exact position before the last ply and also what was the exact position before the last 2 plies.
2. BigDoggProblem
Just...the Dogg
13 Nov '06 23:38
Originally posted by David113
Find a position with 8 pieces or less, where no king is in check, it is not given who moved last, but it is still possible to conclude what was the exact position before the last ply and also what was the exact position before the last 2 plies.
In other words, you want a sound "Last 2 single moves?" problem.
3. 13 Nov '06 23:40
Right
4. 14 Nov '06 00:075 edits
Originally posted by David113
Find a position with 8 pieces or less, where no king is in check, it is not given who moved last, but it is still possible to conclude what was the exact position before the last ply and also what was the exact position before the last 2 plies.
Nevermind. I just realized my position doesn't work.
5. 14 Nov '06 00:38

6. BigDoggProblem
Just...the Dogg
14 Nov '06 00:42
Originally posted by LemonJello

[fen]Kn1k4/Rppp4/p7/8/8/8/8/8 w[/fen]
The Black King could have just captured any piece (even R works, if K came from e7) on d8.
7. 14 Nov '06 00:471 edit
Originally posted by BigDoggProblem
The Black King could have just captured any piece (even R works, if K came from e7) on d8.
Yep, you're right. I'm struggling with this problem.
8. 14 Nov '06 01:303 edits

9. BigDoggProblem
Just...the Dogg
14 Nov '06 02:37
Originally posted by LemonJello