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I have two of Raymond Smullyan's books of retrograde puzzles. I imagine omnipaul (who was quite a bit clearer in explaining the solution than I) had also seen similar stuff before.
Those are good intro books. I have read Holmes and I started Arabian Knights recently.
Don't worry about it - it's meant to take some time to solve, especially for people who have not seen many retrograde problems.
This is a very interesting concept of chess problems. Thank you for posting them here.
Would you happen to know any online source where I could find more of such problems?
The Retro Corner is a good starting point.
Thanks BigDoggProblem, you are cool!
Wow. Unexpected. I hadn't even thought of the captures.
of course both of them are - likely no way
tmkroll and omnipaul have it right. In the 2nd one, you need 6 black pawn captures on dark squares but you have only 5 white pieces that could have been sacrificed on dark squares. Position 2 is illegal.
Position 1 is legal because the doubled pawn is on a white square, which means you only need 5 dark-square captures.
I think this is the best summary! Well put, Mr. Dogg, and nice puzzle! =)
woowww. interesting puzzles! did u make these yourself?
I did this one myself, although I knew of the idea from other retro puzzles.
How much I love chess.
by MrKornKid 7 minutes ago
2/5/2016 - Touchdown
by Aaditrocks 8 minutes ago
3... Be7 known as the Morozevich Variation
by Fiveofswords 9 minutes ago
by RonaldJosephCote 13 minutes ago
The most interesting game of chess was played here in chess.com !!!!
by wirebolt 19 minutes ago
by tomukas131313 25 minutes ago
by BigKingBud 25 minutes ago
Which Dubrovnik Set do you like betterChessBazaar or House of Staunton?
by Drawgood 29 minutes ago
How can I get better at blitz?
by EnergeticHay 45 minutes ago
a puzzle from josh waitzkin's game vs bobby fisher
by FrankoJudo 52 minutes ago
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