JoshHeaps.Net/wwwroot/css/casino/holdem.css

@@ -1102,6 +1102,67 @@ body.hasActionBar #holdemSidebar {
     white-space: nowrap;
 }
 
+/* ---------- Side-pot breakdown ---------- */
+
+.potBreakdown {
+    display: flex;
+    flex-direction: column;
+    gap: 0.2rem;
+    margin-bottom: 0.55rem;
+    padding: 0.4rem 0.55rem;
+    background: rgba(216, 180, 106, 0.07);
+    border: 1px solid rgba(216, 180, 106, 0.25);
+    border-radius: 8px;
+}
+
+.potBreakdownHeading {
+    margin: 0 0 0.35rem;
+    color: #d8b46a;
+    font-size: 0.68rem;
+    letter-spacing: 0.08em;
+    text-transform: uppercase;
+}
+
+.potLayer {
+    display: flex;
+    align-items: baseline;
+    gap: 0.5rem;
+    font-size: 0.76rem;
+}
+
+.potLayerLabel {
+    color: #d8b46a;
+    font-weight: 600;
+    flex: none;
+}
+
+.potLayerAmount {
+    color: #f2f2f2;
+    font-variant-numeric: tabular-nums;
+    font-weight: 600;
+    flex: none;
+}
+
+.potLayerWho {
+    color: #9a9a9a;
+    flex: 1;
+    min-width: 0;
+    text-align: right;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.potBreakdownWizard {
+    margin-bottom: 1rem;
+}
+
+.potLayerReturn .potLayerLabel,
+.potLayerReturn .potLayerAmount {
+    color: #9a9a9a;
+    font-weight: 500;
+}
+
 .actionButtons {
     display: flex;
     gap: 0.5rem;

JoshHeaps.Net/wwwroot/js/casino/holdem/actionBar.js

@@ -34,6 +34,9 @@ const ActionBar = {
 
         host.appendChild(this.renderStatus());
 
+        const breakdown = this.renderPotBreakdown();
+        if (breakdown) host.appendChild(breakdown);
+
         if (Betting.isHandOver(this.state)) {
             host.appendChild(this.renderHandOver());
         } else if (this.state.actingSeatIndex === null || this.state.actingSeatIndex === undefined) {
@@ -71,6 +74,28 @@ const ActionBar = {
         return row;
     },
 
+    // Shown only once someone is all-in and the money has actually split — a single
+    // undivided pot needs no announcement, and a line that's always there stops being
+    // read.
+    renderPotBreakdown() {
+        const contributions = this.state.seats.map((player, index) => ({
+            id: player.id,
+            index,
+            contribution: Betting.handTotal(player),
+            folded: player.folded,
+        }));
+
+        const nameById = new Map(
+            this.state.seats.map((player, index) => [player.id, HoldemState.displayName(player, index)])
+        );
+
+        return Render.buildPotBreakdown(
+            PotCalculator.layers(contributions),
+            PotCalculator.uncalledReturns(contributions),
+            id => nameById.get(id)
+        );
+    },
+
     button(label, className, onClick, sublabel) {
         const btn = document.createElement("button");
         btn.type = "button";

JoshHeaps.Net/wwwroot/js/casino/holdem/potCalculator.js

@@ -24,6 +24,79 @@ const PotCalculator = {
         return entries.filter(e => !e.folded && e.remaining > this.EPSILON);
     },
 
+    // Splits the money on the table into the main pot and any side pots, with who can
+    // win each. Read-only — this is what a dealer says out loud before the showdown
+    // ("main pot four-eighty, side pot ninety between seats 3 and 5"), which is the
+    // announcement that goes missing far more often than the arithmetic goes wrong.
+    //
+    // Every distinct all-in amount opens a new layer: each player pays into a layer up
+    // to their own contribution, and only players who reached that height can win it.
+    // Folded money stays in — it's dead money owed to whoever wins the layer it fell in.
+    layers(players) {
+        const live = players.filter(p => p.contribution > this.EPSILON);
+        if (live.length === 0) return [];
+
+        const heights = [...new Set(live.map(p => Math.round(p.contribution * 100)))].sort((a, b) => a - b);
+
+        const layers = [];
+        let floor = 0;
+        heights.forEach(height => {
+            const band = height - floor;
+            const payers = live.filter(p => Math.round(p.contribution * 100) >= height);
+            const amount = band * payers.length;
+            const eligible = payers.filter(p => !p.folded).map(p => p.id);
+
+            // A band nobody can win isn't a pot — it's an overbet that never got
+            // called, and it goes back to whoever put it in. Announcing it as a side
+            // pot would overstate what's actually being played for.
+            if (amount > 0 && eligible.length > 0) {
+                layers.push({ amount: amount / 100, eligible });
+            }
+            floor = height;
+        });
+
+        // Consecutive layers with the same set of eligible players are one pot to a
+        // dealer — nobody announces two side pots between the same two people.
+        const merged = [];
+        layers.forEach(layer => {
+            const previous = merged[merged.length - 1];
+            const sameEligibility =
+                previous &&
+                previous.eligible.length === layer.eligible.length &&
+                previous.eligible.every(id => layer.eligible.includes(id));
+
+            if (sameEligibility) {
+                previous.amount = Math.round((previous.amount + layer.amount) * 100) / 100;
+            } else {
+                merged.push({ ...layer });
+            }
+        });
+
+        return merged.map((layer, index) => ({
+            ...layer,
+            label: index === 0 ? "Main pot" : `Side pot ${index}`,
+        }));
+    },
+
+    // Chips nobody could call, which the dealer pushes back rather than into the pot.
+    // Anything above the biggest live contribution was never contested — most often an
+    // overbet by someone who then folded.
+    uncalledReturns(players) {
+        const contributing = players.filter(p => p.contribution > this.EPSILON);
+        const liveCents = contributing.filter(p => !p.folded).map(p => Math.round(p.contribution * 100));
+
+        // Nobody live at all means the fold flags are wrong, not that every chip on
+        // the table was uncalled. That's a correction for the dealer to make, so say
+        // nothing here and let the wizard ask them to fix it.
+        if (liveCents.length === 0) return [];
+
+        const cap = Math.max(...liveCents);
+
+        return contributing
+            .map(p => ({ id: p.id, amount: (Math.round(p.contribution * 100) - cap) / 100 }))
+            .filter(r => r.amount > this.EPSILON);
+    },
+
     // Awards the current pot layer to `winnerIds` (one id, or several for a split/tie).
     // The payout is capped at the smallest remaining contribution among the winners —
     // that's the classic side-pot rule: an all-in player can only win what everyone at

JoshHeaps.Net/wwwroot/js/casino/holdem/potWizard.js

@@ -18,13 +18,16 @@ const PotWizard = {
         this.playerLabelById = new Map(
             players.map(p => [p.id, this.labelFor(p, state.seats.indexOf(p))])
         );
-        this.entries = PotCalculator.buildEntries(
+        const contributions = players.map(p => ({
-            players.map(p => ({
             id: p.id,
             contribution: HoldemState.computeContribution(p, state.chipLegend, state.basePotAmount),
             folded: p.folded,
-            }))
+        }));
-        );
+        this.entries = PotCalculator.buildEntries(contributions);
+        // Kept so the wizard can show the whole breakdown up front, not just the layer
+        // it happens to be asking about.
+        this.layers = PotCalculator.layers(contributions);
+        this.returns = PotCalculator.uncalledReturns(contributions);
         this.log = [];
         this.totals = new Map();
 
@@ -58,6 +61,7 @@ const PotWizard = {
 
         const body = document.getElementById("potWizardBody");
         body.innerHTML = "";
+        if (this.log.length === 0) body.appendChild(this.renderBreakdown());
         body.appendChild(this.renderLog());
 
         const remaining = PotCalculator.totalPot(this.entries.filter(e => e.remaining > PotCalculator.EPSILON));
@@ -65,7 +69,17 @@ const PotWizard = {
         if (contenders.length === 0 && remaining > PotCalculator.EPSILON) {
             const warning = document.createElement("p");
             warning.className = "potWizardPrompt";
+
+            // Money left over because nobody could call it isn't a pot anyone won —
+            // it goes back to whoever put it in. Telling the dealer to un-fold someone
+            // to "win" it would be wrong.
+            const returned = (this.returns || []).reduce((sum, r) => sum + r.amount, 0);
+            if (Math.abs(returned - remaining) <= PotCalculator.EPSILON && returned > 0) {
+                const who = this.returns.map(r => this.playerLabelById.get(r.id)).join(", ");
+                warning.textContent = `${Money.format(remaining)} was never called — push it back to ${who} rather than paying it out.`;
+            } else {
                 warning.textContent = `${Money.format(remaining)} is still unassigned, but every remaining player is marked Folded. Uncheck Fold on whoever should win it.`;
+            }
             body.appendChild(warning);
             body.appendChild(this.renderSummary());
             return;
@@ -131,6 +145,20 @@ const PotWizard = {
         });
     },
 
+    // The announcement, spelled out before anyone is asked to pick a winner: what the
+    // main pot is worth, what each side pot is worth, and who can win each.
+    renderBreakdown() {
+        const node = Render.buildPotBreakdown(
+            this.layers || [],
+            this.returns || [],
+            id => this.playerLabelById.get(id),
+            "Announce before the showdown"
+        );
+        if (!node) return document.createDocumentFragment();
+        node.classList.add("potBreakdownWizard");
+        return node;
+    },
+
     renderLog() {
         const wrap = document.createElement("div");
         wrap.className = "potWizardLog";

JoshHeaps.Net/wwwroot/js/casino/holdem/render.js

@@ -520,6 +520,51 @@ const Render = {
         });
     },
 
+    // ---- Pot breakdown ----
+
+    // Shared by the action bar (live, mid-hand) and the pot wizard (before winners are
+    // picked), because both are showing the dealer the same announcement.
+    buildPotBreakdown(pots, returns, nameFor, heading) {
+        if (pots.length < 2 && returns.length === 0) return null;
+
+        const wrap = document.createElement("div");
+        wrap.className = "potBreakdown";
+
+        if (heading) {
+            const title = document.createElement("p");
+            title.className = "potBreakdownHeading";
+            title.textContent = heading;
+            wrap.appendChild(title);
+        }
+
+        const addRow = (label, amount, who, className) => {
+            const row = document.createElement("div");
+            row.className = `potLayer ${className || ""}`;
+
+            const labelEl = document.createElement("span");
+            labelEl.className = "potLayerLabel";
+            labelEl.textContent = label;
+
+            const amountEl = document.createElement("span");
+            amountEl.className = "potLayerAmount";
+            amountEl.textContent = Money.format(amount);
+
+            const whoEl = document.createElement("span");
+            whoEl.className = "potLayerWho";
+            whoEl.textContent = who;
+
+            row.appendChild(labelEl);
+            row.appendChild(amountEl);
+            row.appendChild(whoEl);
+            wrap.appendChild(row);
+        };
+
+        pots.forEach(pot => addRow(pot.label, pot.amount, pot.eligible.map(nameFor).join(", ")));
+        returns.forEach(ret => addRow("Uncalled", ret.amount, `back to ${nameFor(ret.id)}`, "potLayerReturn"));
+
+        return wrap;
+    },
+
     // ---- Session standings ----
 
     renderStandings() {