# Can anyone help me identify these logic puzzles?

Can anyone help me find out what these kinds of puzzles are?

# 1. B&W Grid Puzzle

There's a grid with black & white blocks. A black block will turn white if it's surrounded by 3 white blocks. A white block will turn black if it's surrounded by 2 or 3 black blocks.

Example: If the initial shape is a "cross" made by 5 black blocks, what are the possible results given shapes A, B, C, and D? (See image below)

# 2. Foetus Puzzle

I can't remember exactly how this one works, but generally the contents of an animal's womb is determined by labels depending on the sex of adjacent foetuses.

Rules:

If foetus A is beside 1 male foetus, A is labeled 1M.

If foetus B is beside 2 male foetuses, B is labeled 2M.

If foetus C is beside 0 male foetuses, C is labeled 0M.

They may be mapped out or have related questions, e.g. "What is probability of getting 1M 2M 0M?" or "If there are 2 males and 2 females, what constructions are considered impossible?"

# 3. Colored Grid Puzzle

There is a 3x3 grid and each square must be filled with a certain colour. There are 3 colours (red, green, and blue) to work with, but there aren't necessarily 3 of each.

Example: With the following statements, you have to guess which colour is in column 3, row 2.

1) The square in Column 1, Row 2 is red.

2) In Column 2, there are 2 green squares and 1 blue square.

... etc.

# Notes

I couldn't recall the questions in detail but I hope I explained the type of logic puzzles I'm looking for.

• I don't know about 2 or 3, but your first example seems to just be a version of Conway's Game of Life Nov 30, 2015 at 21:17
• I agree with @Irishpanda, the #1 appears to be a cellular automaton. We have a tag for those (cellular-automata) but it doesn't have much variety right now.
– f''
Nov 30, 2015 at 21:36
• Number 2 sounds like a variation of cellular automata, and number 3 kinda sounds like a variation of the game Mastermind, maybe? Nov 30, 2015 at 21:41
• Thanks guys! It was really worth coming to this site:) BTW is there any special name for this kind puzzles? and where could I get more of these? Thanks again! Nov 30, 2015 at 22:16

1 is Conway's Life, 2 I don't know, but it sounds like MineSweeper, 3 I think is this, but I don't know it's name:

The colours tell you how many of each colour are in each row/column, and are in the order red/blue/green/yellow, so they only tell you how many with no indication of position.

I am not sure if the solution is unique for this one, but here's one:

• It is not unique, for instance, you can swap the first and second column. Sep 23, 2017 at 18:11
• @CarlLöndahl; yeah i can see that! i might make top-left red as a gven...does it make it unique?
– JMP
Sep 23, 2017 at 22:11
• Nope, it doesn't :-) For instance, you can rotate the lower-right set of 4 squares (green-red) 90°. It is well within the limits of brute-force search. By simply enumerating the permutations of the columns (satisfying the upper restrictions) which is roughly, $(4!)^4$ give or take, you can count them all. Sep 23, 2017 at 23:12
• @CarlLöndahl; so i should look for degenerate patterns. i would write some code, but i'm very busy at the moment with other stuff. the usual size of these puzzles is larger, say 8*8, so any code might get unwieldy.
– JMP
Sep 23, 2017 at 23:16