Rules broken:

centered subject
(BW) Solid black to solid white withe a good range of grey
Details in highlights and Shadows
Easily identifiable subject (tangible)
No elements that compete for attention
No large areas of empty space
No bright spots or spots of light
No elements that distract from the subject
Sharp focus
Proper Exposure
No unnecessary background or foreground clutter
shoot an a low ISO

Why the rules were broken

to meet the criteria of the challenge
to add to the contrast between light and dark, inside and outside, wet and dry
to add to the drama of the wet floor