Chalkboard X's and O's Diagram (Bobby Knight era, 1970s-1990s)

Re-render this image as a hand-drawn diagram on a slate chalkboard in the lineage of 1970s-1990s basketball or football coaching whiteboards. Foreground: dense overlapping diagram of X's, O's, arrows, dotted lines, and short cryptic notations in white chalk on dark green-black slate, the diagram covering most of the visible board surface, with the source-image subject either composed within the diagram (as one of the X's or O's, slightly larger and rendered more specifically) or standing at the board mid-instruction, hand raised with a piece of chalk, mid-stroke. Chalkboard texture: visible eraser smears under the new drawing, faint ghost lines from previous diagrams not fully erased, chalk dust accumulated at the bottom edge of the board, the board mounted in a simple wooden frame. Subject (if rendered as figure) wears coaching clothing: collared shirt, slacks, simple shoes, no flash. Light: harsh overhead fluorescent of a locker-room or film-study room, slight cool color cast, hard edge of shadow under the chalk tray. Mood: pure functional specificity, no motivational text, no inspirational quote, the diagram IS the instruction and the instruction IS the discipline. No legible text words, no team names, no specific play names, only the geometry of X's, O's, arrows, and Greek-letter-style cryptic shorthand. Preserve the subject and composition of the source image exactly, integrating them into or in front of the chalkboard. Aspect ratio matches source, prefer landscape orientation if source allows.