## Raymond Smullyan (with extra twists) puzzle

For fans of all other kinds of logic puzzles

### Raymond Smullyan (with extra twists) puzzle

Three gods A, B, and C are called, in some order, True, False, and Random.

True always speaks truly, False always speaks falsely, but whether Random speaks truly or falsely is a completely random matter.

Your task is to determine the identities of A, B, and C by asking three yes-no questions; each question must be put to exactly one god.

The gods understand English, but will answer all questions in their own language. All gods speak same language and use same words for "yes" and "no". You do not know which word means which.
rjamil

Posts: 604
Joined: 15 October 2014
Location: Karachi, Pakistan

### Re: Raymond Smullyan (with extra twists) puzzle

https://en.m.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

A fun puzzle, however it is a known one....
Some do, some teach, the rest look it up.

StrmCkr

Posts: 1205
Joined: 05 September 2006

### Re: Raymond Smullyan (with extra twists) puzzle

Hi,

I think, there are very few known problems that we don't have the solution (in mathematics) at the moment.

https://en.m.wikipedia.org/wiki/List_of_unsolved_problems_in_mathematics

However, I have no knowledge to generate such a new one.

How about, is there any reward if I asked Sudoku related question that might not be discussed earlier?

Let for example, we know how many Sudoku grids are present, essentially different Sudoku grids are present and 17 clues ED puzzles having unique solution at the moment. But, do we know how many ED minimal clues Sudoku puzzles having unique solution are possible?

For each ED grid, how many minimal clues' puzzles are possible having unique solution? (I think maximum clues required to generate valid minimal clues' puzzle is 39. Where as minimum clues is 17.) Let start from the strangely familier grid that has only 29 different 17 clues' puzzles. How many SF grid has different 18-39 clues' puzzles?

http://english.log-it-ex.com/2.html

R. Jamil
______________________________________
There are millions of ways to solve Sudoku puzzles.
However, there are only n! ways to solve single Sudoku puzzle.
(Where n represent number of empty cells.)
rjamil

Posts: 604
Joined: 15 October 2014
Location: Karachi, Pakistan

### Re: Raymond Smullyan (with extra twists) puzzle

http://forum.enjoysudoku.com/high-clue-tamagotchis-t30020-135.html#p234807
A few 40's have been found for the maximum clues with minimal givens.
Some do, some teach, the rest look it up.

StrmCkr

Posts: 1205
Joined: 05 September 2006