I'm inby 
Nikolai1024Comment by CEJ: Hello from the Critique Club!
I have studied your image and have the following to offer:
Composition/perspective - the close perspective is nice and allows the viewer to feel they are looking at their own poker hand.  The size of the subject to the overall image size is good for this type of shot.  Being a minimal content shot, size does matter.  Separation of the subject from the background was done quite well.  The hand does not appear flat at all.  The crop on this shot also works quite well.  The angle of the hand into the shot and the location of the hand of cards is good.    
Color - nice coloring in the scene.  The skin tones look natural; the reds look correct and the black is all black - no fading into gray.  Some fading or compression artifact shows on some of the numbers (see below).
Lighting - for the most part the lighting here was done well.  The ace in the sleeve is a little bright and the fingertips have a small 'glow' on the edges.  The A, K, 9 in the hand, on the card print itself, appears to be at the beginning of being washed out - not smooth like the rest appear.
Challenge requirements - this definitely meets the challenge requirements.  However, I also feel this is where it fell short with the voters due to the abundance of the entries with the same topic.
Overall/my opinion - for the most part the lighting is well done.  The shadow of the thumb is not too dark to become a distraction.  However, some of the texture detail is lost in some places - the sleeve, the skin.  There also seem to be some artifacts in the area just above the thumb - hard to tell if this is lighting or compression.  Overall this is technically a good image.