No imperfections, distortions in proportions or rendering failures. Chessboard and pieces must have accurate anatomy. No imperfections, distortions in proportions, inconsistencies in lighting (deformed iris, deformed pupils), text, worst quality, low quality, jpeg artifacts, ugly, duplicate, morbid, mutilated, (extra fingers), (mutated hands), poorly drawn hands, poorly drawn face, mutation, deformed, blurry, dehydrated, bad anatomy, bad proportions, extra limbs, cloned face, disfigured, gross proportions, malformed limbs, missing arms, missing legs, extra arms, extra legs, (fused fingers), (too many fingers), long neck, camera No errors in anatomy, distortions, asymmetries, or mesh artifacts. Perfect human proportions. Extremely precise details and textures.