On 17/07/2022 5:57 pm, Mike Terry wrote:
> On 17/07/2022 17:16, Richard Heathfield wrote:
>> On 14/07/2022 2:51 am, gerson wrote:
>>> I couldn't solve Brainbashers July the 8th 'very hard' sudoku
>>> without resorting to 'super hard' techniques, and that, 3 or 4
>>> times.
>>> I suppose I overlooked something, but can anybody remember it
>>> being especially hard, or even harder than usual
>>
>> Damn you, I've now tried it six times. No joy.
>>
>>
>
> The BrainBashers sudokus are machine-generated somehow, and I
> can't imagine that the generation processes doesn't perform a
> solve-check using just the allowed solution techniques, which
> will all be programmed into the generator as runtime selectable
> options.
Be that as it may, I'm going to bloody well do this.
Solution follows, from which you will learn NOTHING. :-(
Solution follows, from which you will learn NOTHING. :-
Solution follows, from which you will learn NOTHING. :
Solution follows, from which you will learn NOTHING.
Solution follows, from which you will learn NOTHING.
Solution follows, from which you will learn NOTHING
Solution follows, from which you will learn NOTHIN
Solution follows, from which you will learn NOTHI
Solution follows, from which you will learn NOTH
Solution follows, from which you will learn NOT
Solution follows, from which you will learn NO
Solution follows, from which you will learn N
Solution follows, from which you will learn
Solution follows, from which you will learn
Solution follows, from which you will lear
Solution follows, from which you will lea
Solution follows, from which you will le
Solution follows, from which you will l
Solution follows, from which you will
Solution follows, from which you will
Solution follows, from which you wil
Solution follows, from which you wi
Solution follows, from which you w
Solution follows, from which you
Solution follows, from which you
Solution follows, from which yo
Solution follows, from which y
Solution follows, from which
Solution follows, from which
Solution follows, from whic
Solution follows, from whi
Solution follows, from wh
Solution follows, from w
Solution follows, from
Solution follows, from
Solution follows, fro
Solution follows, fr
Solution follows, f
Solution follows,
Solution follows,
Solution follows
Solution follow
Solution follo
Solution foll
Solution fol
Solution fo
Solution f
Solution
Solution
Solutio
Soluti
Solut
Solu
Sol
So
S
Block 1 top left is 2, 6, or 9.
2 leads to a contradiction about a month down the line.
So does 6. So top left is a 9.
The next cell along is 2, 4, or 6.
2 again leads to a contradiction. Put a 4 there, everything
works, and elegance be damned.