From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2009-09-19T20:29:25+09:00
Subject: Re: Sudoku Difficulty

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Mark:

> On Sat, 19 Sep 2009 03:28:10 -0500, Vipul Kelkar wrote:

>> I am trying to develop a sudoku app in ruby. I want to
>> have the difficulty levels..say easy Medium and hard

>> What decides the level of difficulty.How should i place
>> my numbers depending upon the difficulty level selected

> Not a Sudoku expert but is it just the number of numbers initially
> displayed? ie the less to start with the harder the game?

I don=E2=80=99t think it=E2=80=99s this simple =E2=80=93 a proper Sudoku sh=
ould be always
solveable without taking a guess, and I think the hardest are
the ones that put the solver in a position where there=E2=80=99s only
one non-guessing move on the whole board (or, at least, as few
such moves as possible), and taking this move leads to another
such hard situation.

=E2=80=94 Shot
--=20
My son said =E2=80=98I love you, sir=E2=80=99 for the first time. I slapped
him and sent him away, then stood at my study window,
mustache wet with tears.               [Joshua Green Allen]

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