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And a pseudohybrid 7x7 puzzle (with AND and XOR operators) https://www.calcudoku.org/forum/viewtopic.php?f=16&t=124 
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Author:  pnm [ Sat Dec 03, 2011 10:00 pm ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
hi clm, cool puzzle clm wrote: If you have the possibility of including these “new” operations in the solver, then if you give me a symbol for them, I would send you the code in order to confirm the unicity of the solution and to obtain the “solver rating” For XOR use ^, and for AND use &. Patrick 
Author:  clm [ Sun Dec 04, 2011 12:51 am ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
pnm wrote: ... For XOR use ^, and for AND use &. Patrick Thank you, here is the code for the 7x7 pseudohybrid puzzle (arithmetic and logic operators), however I have observed that you are using the same symbol, ^, for the operation XOR than for the exponentiation (previous topic 7x7 hybrid with all operators), I assume it's Ok: 7 4,&,a1a2 1,^,b1b2 2,+,c1 7,,d1e1 6,,f1g1 3,,c2d2 2,:,e2f2 3,,g2g3 3,,a3b3 1,,c3c4 5,,d3e3 5,+,f3 2,,a4b4 15,x,d4c5d5 24,x,e4e5f5 7,,f4g4 2,&,a5b5 3,,g5g6 2,:,a6a7b7 5,+,b6 5,+,c6d6 5,^,e6f6 3,^,c7d7 2,,e7f7 2,+,g7 
Author:  pnm [ Sun Dec 04, 2011 1:43 am ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
clm wrote: Thank you, here is the code for the 7x7 pseudohybrid puzzle (arithmetic and logic operators), however I have observed that you are using the same symbol, ^, for the operation XOR than for the exponentiation (previous topic 7x7 hybrid with all operators), I assume it's Ok: Hm, you're right, I'll have to figure something out. The ^ for XOR is borrowed from C, the ^ for exponentiation from LaTeX .. Patrick 
Author:  sneaklyfox [ Sun Dec 04, 2011 7:30 am ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
Very interesting. clm (or anyone)... can you make a puzzle with no specified operator? 
Author:  clm [ Sun Dec 04, 2011 9:37 am ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
sneaklyfox wrote: Very interesting. clm (or anyone)... can you make a puzzle with no specified operator? Yes, sneaklyfox, it is easy to prepare it but I think that, at least, the type of operations must be specified, if these are the four conventional arithmetic operations, etc. (since the Patrick Min's Calcudoku uses special operations that nobody else uses), otherwise I think it would be almost impossible to solve it. Meanwhile, take a look at this "mathmojo" 9x9 kenken with blank cages and try to solve it (before checking the solution... those terrible 26 steps and 28 graphics ): http://www.mathmojo.com/chronicles/kenken/ (Note: Reedited just to correct a typo error) 
Author:  starling [ Sun Dec 04, 2011 10:14 am ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
clm wrote: sneaklyfox wrote: Very interesting. clm (or anyone)... can you make a puzzle with no specified operator? Yes, sneaklyfox, it is easy to prepare it but I think that, at least, the [b]type/b] of operations must be specified, if these are the four conventional arithmetic operations, etc. (since the Patrick Min's Calcudoku uses special operations that nobody else uses), otherwise I think it would be almost impossible to solve it. Meanwhile, take a look at this "mathmojo" 9x9 kenken with blank cages and try to solve it (before checking the solution... those terrible 26 steps and 28 graphics ): http://www.mathmojo.com/chronicles/kenken/ Did they manage to avoid the usual solution noops do where there are usually multiple solutions? I really dislike noops because they almost never do. 
Author:  clm [ Sun Dec 04, 2011 1:22 pm ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
starling wrote: clm wrote: sneaklyfox wrote: Very interesting. clm (or anyone)... can you make a puzzle with no specified operator? Yes, sneaklyfox, it is easy to prepare it but I think that, at least, the type of operations must be specified, if these are the four conventional arithmetic operations, etc. (since the Patrick Min's Calcudoku uses special operations that nobody else uses), otherwise I think it would be almost impossible to solve it. Meanwhile, take a look at this "mathmojo" 9x9 kenken with blank cages and try to solve it (before checking the solution... those terrible 26 steps and 28 graphics ): http://www.mathmojo.com/chronicles/kenken/ Did they manage to avoid the usual solution noops do where there are usually multiple solutions? I really dislike noops because they almost never do. I am not sure I am understanding you very well this time, starling (my English...! ), but I am in your group, I do not like them very much, though they can be built with a unique solution I believe (in this case the computer will elapse more time to insure the unicity consequently increasing the difficulty level) but they are a curious type of calcudokus anyway (the possibility of building them with a reduced number of solutions may be considered in some circumstances though the general philosophy for all type of puzzles "politically correct", sudokus, kakuros, kenkens, ... is that they have a unique solution, and this is easier at the time of publishing the solutions I think..., this is an absolute target in the case of Patrick's calcudokus). 
Author:  starling [ Sun Dec 04, 2011 11:36 pm ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
clm wrote: starling wrote: Did they manage to avoid the usual solution noops do where there are usually multiple solutions? I really dislike noops because they almost never do. I am not sure I am understanding you very well this time, starling (my English...! ), but I am in your group, I do not like them very much, though they can be built with a unique solution I believe (in this case the computer will elapse more time to insure the unicity consequently increasing the difficulty level) but they are a curious type of calcudokus anyway (the possibility of building them with a reduced number of solutions may be considered in some circumstances though the general philosophy for all type of puzzles "politically correct", sudokus, kakuros, kenkens, ... is that they have a unique solution, and this is easier at the time of publishing the solutions I think..., this is an absolute target in the case of Patrick's calcudokus). Nah, it's not your English, for some reason I wrote the word solution where I meant problem in the bolded place. That post was written at the end of an 8 hours stretch studying for finals, and I wasn't exactly thinking completely straight (Finals wouldn't be so bad if my teachers weren't deliberately trying to screw my grades over because I never go to class. I actually explicitly had one teacher tell me that none of my answers on past tests are wrong, but he wouldn't be giving me credit back). Anyhow, basically, it's between hard and impossible to write a difficult noop that doesn't have multiple solutions. If it has one solution, it's probably easy. If it's hard, it probably has multiple solutions. 
Author:  pnm [ Sun Dec 04, 2011 11:46 pm ] 
Post subject:  Re: And a pseudohybrid 7x7 puzzle (with AND and XOR operator 
starling wrote: Anyhow, basically, it's between hard and impossible to write a difficult noop that doesn't have multiple solutions. If it has one solution, it's probably easy. If it's hard, it probably has multiple solutions. It is possible to modify my solver so it'll accept cages without an operation, but it'll be quite a job. Once done, it should be possible to control the level of difficulty "as normal", i.e. to create a difficult puzzle with a single solution. Patrick 
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