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another Calcudoku Advanced book
http://www.calcudoku.org/forum/viewtopic.php?f=5&t=709
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Author:  pnm  [ Mon Jun 22, 2015 5:33 pm ]
Post subject:  another Calcudoku Advanced book

This one was still in the pipeline, I thought I'd push it through before the holidays as well..:

Image

http://www.amazon.com/Calcudoku-121-Adv ... 1512020176

Then there won't be books for a while: they take a _long_ time to produce [huh]

Next I should make the books that are out of print available as PDF downloads (now that the
framework for this is in place (via http://www.calcudoku.org/ops/buybook)).

Solutions to all puzzles (except the first 10 "warmup" ones) can be submitted for points (12 each) on the site.

Author:  calcpnm  [ Wed Jul 08, 2015 11:50 am ]
Post subject:  Re: another Calcudoku Advanced book

Another request for reviews on Amazon [biggrin]


If you got the book, can you leave a review?

Many thanks [love]

Author:  clm  [ Sat Aug 08, 2015 12:25 pm ]
Post subject:  Re: another Calcudoku Advanced book

calcpnm wrote:
Another request for reviews on Amazon [biggrin]


If you got the book, can you leave a review?

Many thanks [love]


I am sure you have observed that puzzle number 34 (exponentiation, page 64), A3E4, is indicating (below) 10x10 puzzle, while it's a 9x9.
And puzzle number 109 (variations, page 156), A3V9, is indicating 8x8 puzzle, while it's a 6x6, so you have small corrections for the next edition :-).

It's a very advanced book, wonderful, some puzzles are really difficult.

Author:  pnm  [ Sat Aug 08, 2015 4:56 pm ]
Post subject:  Re: another Calcudoku Advanced book

clm wrote:
I am sure you have observed that puzzle number 34 (exponentiation, page 64), A3E4, is indicating (below) 10x10 puzzle, while it's a 9x9.
And puzzle number 109 (variations, page 156), A3V9, is indicating 8x8 puzzle, while it's a 6x6, so you have small corrections for the next edition :-)

Argh, those slipped through, even after a "manual" check of each puzzle [crying]

Thanks for pointing this out.
clm wrote:
It's a very advanced book, wonderful, some puzzles are really difficult.

Good, if you say this, then they must be difficult indeed [lol]

Author:  frederick  [ Wed Aug 26, 2015 10:52 pm ]
Post subject:  Re: another Calcudoku Advanced book

pnm wrote:
clm wrote:
It's a very advanced book, wonderful, some puzzles are really difficult.

Good, if you say this, then they must be difficult indeed [lol]



That is wonderful, "difficult indeed" :j

Actually, what would be wonderful would be our esteemed clm giving us the low down on which puzzles were difficult and which really difficult :)

(I then could leave until some weird masochistic mood strikes me those delicious "really difficult", or until never, whichever comes first:)

Author:  clm  [ Fri Aug 28, 2015 3:13 pm ]
Post subject:  Re: another Calcudoku Advanced book

frederick wrote:
pnm wrote:
clm wrote:
It's a very advanced book, wonderful, some puzzles are really difficult.

Good, if you say this, then they must be difficult indeed [lol]



That is wonderful, "difficult indeed" :j

Actually, what would be wonderful would be our esteemed clm giving us the low down on which puzzles were difficult and which really difficult :)

(I then could leave until some weird masochistic mood strikes me those delicious "really difficult", or until never, whichever comes first:)


Hi, frederick. In general, the difficulty has a subjective component, of course (I have not finished solving all puzzles in the book yet, around the 70%). I do not think the wide puzzles or the variations are the more difficult. However the large modulo, from zero and no-op could reach a really high level of difficulty.

A 10x10 no-op is a typical example of a really difficult. Let's think, for instance, that a "simple" 3-cell cage "4" has: as sum [1,1,2], as product [1,1,4] and [1,2,2], as division [1,1,4] again and [1,2,8], and as a subtraction: [1,1,6], [2,2,8], [3,3,10], [1,2,7], [1,3,8], [1,4,9], [1,5,10], [2,3,9] and [2,4,10], so 13 different combinations.

This is only my opinion (for the moment) with respect to this book.
Really difficult:
Puzzle 49 (A3G4, 9x9 -4 to 4 negative numbers)
Puzzle 50 (A3G5, 11x11 -5 to 5 negative numbers)
Puzzle 58 (A3M18, 10x10 modulo) (the harder I have found to the moment)
Puzzle 62 (A3S12, 8x8 single operator modulo)
Puzzle 67 (A3Z12, 7x7 from zero)
Puzzle 75 (A3Z20, 10x10 from zero)

Very difficult:
Puzzle 91 (A3N6, 8x8 no-op)
Puzzle 92 (A3N7, 9x9 no-op)
Puzzle 93 (A3N8, 9x9 no-op)
Puzzle 94 (A3N9, 10x10 no-op)
Puzzle 95 (A3N10, 10x10 no-op)

Author:  frederick  [ Fri Aug 28, 2015 3:22 pm ]
Post subject:  Re: another Calcudoku Advanced book

Thanks clm
Your thoughts are always a great help:)

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