Does cutting the deck change the deal?

The claim: “You cannot prove to me that cutting the deck before dealing the cards has an effect on the outcome.”

Here is the proof, played with real cards. Fix a shuffled deck, choose the exact cut position, then deal to 4 players — 1 card each on the first round, then 2 cards at a time until all 52 cards are gone. Watch every player's 13 cards change as you move the cut.

Cut after cards

Deal mode

Deck order (after the cut)

52 cards

Dealing starts from the TOP — the first card on the left. Click any card to make it the cutting card (the new first card to be dealt).

The deal — 1 card each, then 2 at a time

Highlight cards moved by the cut

Every cut position → who gets every card

Each row is one of the 52 possible cuts. Each column is one card position in the shuffled order. A cell's colour shows which player receives that card under that cut. Moving the cut rotates the whole assignment — the cut position is a dial that selects a different deal.

Legend: P1 P2 P3 P4

What this proves (and what it does not)

The cut changes the outcome for a given deck. A cut is a rotation of the deck order. For a fixed shuffled order, each of the 52 possible cut positions sends the cards into different hands — this demo shows all 52 outcomes are distinct.
You control it precisely. Because the deal alternates 1-at-a-time then 2-at-a-time, the exact cut position maps into the exact set of 13 cards each player receives.
Fairness note. If the deck is properly randomized and you do not know its order, a cut alone does not give any player a statistical advantage — every hand stays equally likely. The cut is not a way to beat a fair shuffle; it is a mechanical dial that decides which specific cards go where once the order is fixed.