When a player successfully connects 4, the game should end. Therefore, except in the case of a draw, the colour of the last move is the winning colour. It's a trick question!

The instructions for this kata are very unclear.

This Kata is too dificult for level 7 kyu. The description is also very poor.

I think i get it now: A group of pixels is 4-connected if and only if: Starting at any one pixel in that group, you can arrive at any other pixel in that group by moving directly up, down, left or right onto another pixel in the same group or (in the case of a group consisting of a single pixel) by not moving at all.

Here is an example: https://postimg.cc/bDQPq7wP

Top grid: if we define one group as being all the squares that are coloured black, then the group of black squares forms a 4-connected group. I can start anywhere and arrive anywhere by either not moving or by moving up, down, left or right onto a black square. If we consider all the white squares to form one group, then this group is not 4-connected. HOWEVER if we consider each of the adjacent pairs of white squares to be seperate groups then we can say that the white squares as a whole form two seperate 4-connected groups.

Bottom Grid: The black squares do not form a 4-connected group but we can consider two seperate clusters of black squares to be 2 seperate 4-connected groups distinct from each other. The same goes for the white squares which DO NOT FORM a 4 connected group but can be segregated into two seperate groups each of which is 4-connected.

I can't work out what you mean by a 4-connected pixel. I read the wikipedia page and it seemed very simple: a pixel is 4-connected if it there is another pixel of the same colour above, below, to the left and to the right of itself. In other words, it is 4-connected if: when you move one space up, down, left or right, you will arrive at another pixel of the same colour. This definition would imply that there is only 1 white connected pixel in the example you have used in the description. Is it possible that you could explain what you mean by a 4-connected pixel in a very simple way - i've read through the previous clarifying exaplanations you have given but i don't understand them.

Many thanks!

The Instructions for this kata are very poorly worded.