[Retros] Add pieces

[Noam Elkies]

Theodore Hwa <hwatheod at cs.stanford.edu> writes:


> Does this work? (18 units)



> Put all white pawns on 5th rank.

> Put all black pawns on 4th rank.

> Kings anywhere not in check.


Is this even legal to begin with?  There's no way to retract
a pawn move, right?

afretro <afretro at yandex.ru> writes:


> What's all the fuss about?



> [...] Any position with closed balances would do. E.g. [...]


That's another risk of trying to compose tasks well past midnight...

NDE