# [Retros] Challenge

Pascal Wassong pascal.wassong at free.fr
Sat Nov 28 15:59:15 EST 2009

Hello,

I think that this example has many flaws, but I agree with the
conclusion, that it should be easy to build a position as intended by
Kevin.

In the given example:
- for n > 2, white can play 1.B~ and 2.Bf8 etc...
- for n > 8 and n < 52, white can play 1.h7, and the wKh6 can help to
mate.
- but for n > 51, it is better for white to keep a pawn move for
later, so that the 50 moves rules doesn't force a draw.
- for n > 100, I don't know if there are solutions, as the bK must
move to allow for 2 pawn moves or a pawn move and a capture.

Pascal

>>>>> "Kevin" == Kevin Begley <kevinjbegley at gmail.com> writes:

Kevin> Hi all, Unless I have misread Juha Saukkola's challenge, it
Kevin> is rather trivial to achieve n=infinity with only 6 men...

>> Find a such kind of position that there is mate in 1 with only
>> one move, mate in 2 with only one starting move, ... mate in n
>> with only one starting move. maximize n!

Kevin> Nowhere does it say that the key for each mate (from #2 to
Kevin> #n) must be unique, so why not:

Kevin> white Ka1 Bf8 Sf6 Ph6 black Kh8 Ba2 (4+2)

Kevin> #1 Bg7# #2 (exact): 1.Kb2! ... #n (exact): 1.Kb2! (for
Kevin> all n > 2).

Kevin> If the keys must all be unique, the challenge is, of
Kevin> course, much tougher.

Kevin> Best, Kevin.
Kevin> _______________________________________________ Retros
Kevin> mailing list Retros at janko.at
Kevin> http://www.pairlist.net/mailman/listinfo/retros