yrizoud, I forgot about another meaning of "diamonds" 
And thanx for correction of small preview! Fixed.
Your picture uses 3 of the 4 suits of colors (♥♣♠), "diamonds" is the name of the 4th (♦). I have to admit I searched for it too 
Note that for the Pixeljoint gallery, you shouldn't use a reduction of your image as a thumbnail. You can use for example a cropped part of your main image, showing some interesting pixels but leaving some mystery about what is the whole thing :)
Stickman, diamonds? What diamonds? epix? yes, I've planned to draw everything flat, but without shading chess pieces looks lost on the board. Everyone thanks for comments and points!
Neat design, although it looks strange to have that shading on the chess pieces when everything else is unshaded line art. I like the colours.
D: