2 edits
A mate in 16 was posted on the main forum a few days ago
to test the solving speed of computers.
It had dual soultions.
The dual solution is easily repaired by adding pawns on e3 & e4.
There. Mate in 16 with one solution.
It is actually quite good - the composer knows the solver will soon
see the idea of getting the Rook to the h-file.
But which rank will he use. The 6th, the 7th or the 8th.
Two are wrong - one is right.
You only discover you are on the wrong on right rank at move 13.
That is why the pawns were on c4 & c5 in the original.
I'm sure the position posted was an original very close to
the repaired version I have posted - anybody know it?
(where did the original position [remove the e-file pawns] come from?)
Originally posted by greenpawn34Nice fix. I cannot see a flaw in it, so far. I'm also running a computer test to see if there are any other duals lurking.
A mate in 16 was posted on the main forum a few days ago
to test the solving speed of computers.
It had dual soultions.
The dual solution is easily repaired by adding pawns on e3 & e4.
[fen]8/8/8/2p5/R1P1p3/P3P1p1/P3K1p1/6k1 w[/fen]
There. Mate in 16 with one solution.
It is actually quite good - the composer knows the solver will soon
...[text shortened]... ed - anybody know it?
(where did the original position [remove the e-file pawns] come from?)
I also looked around a bit for this problem elsewhere online. So far, I have not found it.
1 edit
It does look like a composed position.
It has all the trade marks.
pawn on g3 to keep King restricted.
pawn on a2 to stop Qa8-a1.
Pawns on c4 & c5 to give choice of 3 ranks. (the theme).
The coincidence that only one rank will work and it all
becomes clear on move 13.
It's not a random position - have PM'd Dana to ask where it came from.