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

@@ -568,8 +568,19 @@ button,
 
 .dealerChip {
     position: absolute;
-    top: -10px;
-    right: -10px;
+    /* Inside its own seat, not on the rim.
+       
+       It used to sit at -10px/-10px, hanging over the seat's corner — which on an oval
+       of overlapping seats means hanging over the seat *next to it*. Measured on a
+       nine-seat table: tapping the centre of seat 1 gave the button to seat 9. That
+       was always slightly true and the enlarged hit area made it much worse; three of
+       nine seats were losing taps, one of them losing its own middle.
+       
+       Tucked inside, the overlap is zero at every size. It reads as a puck in the
+       corner of the seat rather than on its edge, which is a small price for tapping
+       a player and getting that player. */
+    top: 3px;
+    right: 3px;
     width: 22px;
     height: 22px;
     border-radius: 50%;
@@ -595,10 +606,20 @@ button,
 .dealerChip::after {
     content: "";
     position: absolute;
-    top: -9px;
-    right: -7px;
-    bottom: -15px;
-    left: -14px;
+    /* Grows inward, over its own seat, not outward onto the neighbours.
+       
+       The chip already sits outside its seat by design — top:-10px, right:-10px — so
+       a pad that also reaches up and right lands on whatever seat is next around the
+       oval. It did: three of nine seats had taps taken by a neighbour's chip, seat 1
+       losing 10 of 49 sampled points including its own centre, which meant tapping
+       the middle of seat 1 gave the button to seat 9.
+       
+       Down and left is its own seat, which is a large target that can spare the
+       corner. The two pixels of outward reach are just to cover the chip's border. */
+    top: -3px;
+    right: -3px;
+    bottom: -18px;
+    left: -18px;
 }
 
 .dealerChip:focus-visible {
@@ -2787,9 +2808,20 @@ body.hasActionBar #toastHost {
        against the containing block's width, not the element's own, so narrowing the
        wrap on its own left it full height regardless. */
     #pokerTableWrap {
-        --feltRoom: calc(100vh - var(--actionBarHeight, 0px) - 8.5rem);
-        width: min(100%, calc(var(--feltRoom) / 0.72));
+        /* A wide ellipse, which is what a real poker table is.
+        
+           Capping the width by the height to hold the portrait aspect ratio was
+           throwing away most of the screen: at 640x360 the felt came out 135px wide
+           inside a 601px column — 22% of the width — leaving 366px of rim for nine
+           seats that need 662px. Adjacent seat centres ended up 13px apart, which is
+           why a seat's centre belonged to its neighbour.
+        
+           Landscape has width and no height, so the table takes the width it has and
+           is only as tall as the room left over. */
+        --feltRoom: calc(100vh - var(--actionBarHeight, 0px) - 7rem);
+        width: 100%;
         height: var(--feltRoom);
+        min-height: 7rem;
         padding-bottom: 0;
     }
 
@@ -2826,6 +2858,7 @@ body.hasActionBar #toastHost {
         width: 62px;
         min-height: 40px;
     }
+
 }
 
 /* ---------- Short phones, upright ----------
@@ -3006,3 +3039,10 @@ textarea:focus-visible {
     color: #ecffef;
     font-weight: 600;
 }
+
+/* The quieter half of the deal prompt: things the deal is about to do that a dealer
+   would otherwise only discover afterwards. */
+.dealPromptLine.dealPromptAside {
+    font-size: 0.72rem;
+    color: #9a9a9a;
+}

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

@@ -494,6 +494,17 @@ const ActionBar = {
             `${preview.headsUp ? " · heads-up" : ""}${preview.manual ? " · blinds set by hand" : ""}`;
         wrap.appendChild(line);
 
+        // Dealing relocates a button sitting on an empty chair. That has to be said
+        // before it happens rather than discovered afterwards — a fresh table starts
+        // the button on seat 1 whether or not anyone is sitting there.
+        if (preview.buttonMoves) {
+            const moved = document.createElement("p");
+            moved.className = "dealPromptLine dealPromptAside";
+            moved.textContent =
+                `Button moves to ${name(preview.buttonIndex)} — seat ${this.state.dealerSeatIndex + 1} is empty.`;
+            wrap.appendChild(moved);
+        }
+
         const row = document.createElement("div");
         row.className = "actionButtons";
         row.appendChild(this.button("Post blinds & deal", "actionDeal", () => {

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

@@ -33,10 +33,22 @@ const Betting = {
     // while the table is still being set, so a dealer can see where they'll land
     // before any money moves.
     blindPreview(state) {
-        const { sbIndex, bbIndex, headsUp, manual } = HoldemState.getBlindSeats(state);
+        // Dealing relocates a button parked on an empty chair before it works out who
+        // posts, so the preview has to answer for the button where it *will* be. Asking
+        // from where it currently sits gave a different pair of blinds than the deal
+        // produced — the preview promising one thing and doing another is exactly the
+        // guessing this whole step exists to remove.
+        const buttonIndex = HoldemState.buttonSeatForDeal(state);
+        const asDealt = buttonIndex === state.dealerSeatIndex
+            ? state
+            : { ...state, dealerSeatIndex: buttonIndex };
+
+        const { sbIndex, bbIndex, headsUp, manual } = HoldemState.getBlindSeats(asDealt);
         if (sbIndex === null || bbIndex === null) return null;
         return {
             sbIndex, bbIndex, headsUp, manual: !!manual,
+            buttonIndex,
+            buttonMoves: buttonIndex !== state.dealerSeatIndex,
             smallBlind: this.round(state.smallBlind || 0),
             bigBlind: this.round(state.bigBlind || 0),
         };

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

@@ -96,13 +96,21 @@ document.addEventListener("DOMContentLoaded", () => {
             });
         },
 
-        makeDealer: index => seatAction(index, `Button on ${nameOf(index)}.`, () => {
-            state.dealerSeatIndex = index;
-            // Before anyone has acted the blinds are still just sitting there, so
-            // moving the button moves them too — a home game passes it round several
-            // times before the cards come out, and the posted chips have to follow.
-            if (Betting.onlyBlindsIn(state)) Betting.repostBlinds(state);
-        }),
+        makeDealer: index => {
+            // Before the deal there's nothing posted, so this is just moving a marker.
+            // After it, the blinds have to follow the button or the badges and the
+            // money disagree — but that's a real thing happening to real chips, and
+            // the dealer gets told rather than finding out later.
+            const willRepost = state.bettingOpen && Betting.onlyBlindsIn(state) &&
+                HoldemState.unresolvedContributions(state) > Betting.EPSILON_CHIPS;
+
+            seatAction(index, willRepost
+                ? `Button on ${nameOf(index)} — blinds taken back and re-posted.`
+                : `Button on ${nameOf(index)}.`, () => {
+                state.dealerSeatIndex = index;
+                if (willRepost) Betting.repostBlinds(state);
+            });
+        },
 
         assignBlind: (index, which) => {
             const blinds = HoldemState.getBlindSeats(state);

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

@@ -273,15 +273,25 @@ const HoldemState = {
     // position off it. On the very first hand of a fresh table it starts on seat 1
     // whether or not anybody is sitting there, and a table that empties out around it
     // leaves it stranded. Move it to a real player before a hand is dealt.
-    ensureButtonOnPlayer(state) {
-        if (state.seats[state.dealerSeatIndex] && state.seats[state.dealerSeatIndex].inHand) return;
+    // Where the button will be when the hand is dealt — without moving it.
+    //
+    // Kept separate from ensureButtonOnPlayer because the deal preview has to be able
+    // to ask the question without answering it. It couldn't, and so the preview lied:
+    // with the button parked on an empty chair it promised one pair of blinds and
+    // dealing produced another, because beginHand relocates the button first and then
+    // works out who posts.
+    buttonSeatForDeal(state) {
+        const seated = state.seats[state.dealerSeatIndex];
+        if (seated && seated.inHand) return state.dealerSeatIndex;
         for (let step = 0; step < state.seatCount; step++) {
             const index = this.nextSeatIndex(state, state.dealerSeatIndex, step);
-            if (state.seats[index].inHand) {
-                state.dealerSeatIndex = index;
-                return;
-            }
+            if (state.seats[index].inHand) return index;
         }
+        return state.dealerSeatIndex;
+    },
+
+    ensureButtonOnPlayer(state) {
+        state.dealerSeatIndex = this.buttonSeatForDeal(state);
     },
 
     // A hand-picked blind is only usable if that seat is actually in the hand — a

tests/holdem/dealStep.test.js

@@ -161,3 +161,45 @@ describe("a table saved mid-hand comes back mid-hand", () => {
         assert.equal(state.bettingOpen, false);
     });
 });
+
+describe("the preview tells the truth about the button", () => {
+    test("a button parked on an empty chair is answered for where it will be", () => {
+        // The preview used to read the button where it sat, while dealing relocated it
+        // first — so it promised one pair of blinds and produced another.
+        const state = makeTable({ seatCount: 6, seated: [1, 2, 3], dealerSeatIndex: 0 });
+        state.bettingOpen = false;
+        assert.equal(state.seats[0].inHand, false, "the button is on an empty chair");
+
+        const preview = Betting.blindPreview(state);
+        assert.equal(preview.buttonMoves, true, "and the preview knows it will move");
+
+        Betting.beginHand(state);
+
+        assert.equal(Betting.committed(state.seats[preview.sbIndex]), preview.smallBlind);
+        assert.equal(Betting.committed(state.seats[preview.bbIndex]), preview.bigBlind);
+        assert.equal(state.dealerSeatIndex, preview.buttonIndex, "and it moved where it said");
+    });
+
+    test("asking where the button will be doesn't move it", () => {
+        const state = makeTable({ seatCount: 6, seated: [1, 2, 3], dealerSeatIndex: 0 });
+        state.bettingOpen = false;
+
+        Betting.blindPreview(state);
+        Betting.blindPreview(state);
+
+        assert.equal(state.dealerSeatIndex, 0, "the preview is a question, not an action");
+    });
+
+    test("a button already on a player is left alone", () => {
+        const state = makeTable({ seatCount: 6, seated: [0, 1, 2], dealerSeatIndex: 0 });
+        state.bettingOpen = false;
+        const preview = Betting.blindPreview(state);
+        assert.equal(preview.buttonMoves, false);
+        assert.equal(preview.buttonIndex, 0);
+    });
+
+    test("buttonSeatForDeal copes with a table nobody is sitting at", () => {
+        const state = makeTable({ seatCount: 6, seated: [] });
+        assert.equal(HoldemState.buttonSeatForDeal(state), state.dealerSeatIndex);
+    });
+});

tests/holdem/uiAudit.js

@@ -133,7 +133,18 @@ const LayoutAudit = {
                 if (el.contains(top) || top === el || top.contains(el)) return;
                 // Seats ring a round table and overlap each other at the rim by
                 // design; that is crowding, not an overlay hiding a control.
-                if (top.closest && top.closest(".seat")) return;
+                //
+                // But only the seat's *body* is harmless. A neighbouring seat's own
+                // controls sitting on top of this one is a control being stolen, and
+                // exempting the whole seat subtree hid exactly that: an enlarged
+                // dealer-chip hit area was taking the centre of the seat three
+                // places round the table, and this check called it crowding and
+                // moved on.
+                const neighbourSeat = top.closest && top.closest(".seat");
+                if (neighbourSeat) {
+                    const isControl = top.matches && top.matches("button, a, input, select, textarea, [role='button']");
+                    if (!isControl) return;
+                }
                 blocked++;
                 if (!blockedBy) blockedBy = this.describe(top);
             });
@@ -468,6 +479,41 @@ const LayoutAudit = {
         return { name: `touch targets at least ${minimum}px`, offenders };
     },
 
+    // Tapping the middle of a seat must give you that seat.
+    //
+    // Added after a dealer-chip hit area, meant to make a 22px puck thumb-sized, grew
+    // outward from a chip that already hung over its seat's corner — and therefore
+    // over the seat next to it. On a nine-seat table, tapping the centre of seat 1
+    // handed the button to seat 9. The occlusion check missed it because it treated
+    // anything inside a `.seat` as harmless crowding.
+    //
+    // Reported separately from occlusion because the cause is different: not an
+    // overlay on top of the table, but two pieces of the table fighting over a tap.
+    seatOwnership() {
+        const seats = [...document.querySelectorAll(".seat")];
+        const offenders = [];
+
+        seats.forEach((seat, index) => {
+            const rect = seat.getBoundingClientRect();
+            if (rect.width === 0 || rect.height === 0) return;
+            const x = rect.left + rect.width / 2;
+            const y = rect.top + rect.height / 2;
+            if (x < 0 || y < 0 || x >= innerWidth || y >= innerHeight) return;
+
+            const hit = document.elementFromPoint(x, y);
+            if (!hit || seat.contains(hit) || hit === seat) return;
+
+            const other = hit.closest(".seat");
+            const who = other ? `seat ${seats.indexOf(other) + 1}` : this.describe(hit);
+            const control = hit.matches && hit.matches("button, a, input, select, [role='button']");
+            offenders.push(
+                `seat ${index + 1}'s centre goes to ${who}${control ? "'s " + this.describe(hit) : ""}`
+            );
+        });
+
+        return { name: "a seat's centre belongs to that seat", offenders };
+    },
+
     // ---- Runner ----
 
     runAll(options = {}) {
@@ -480,6 +526,7 @@ const LayoutAudit = {
             this.textSpill(),
             this.horizontalOverflow(),
             this.fieldFontSize(),
+            this.seatOwnership(),
         ];
         if (options.includeTouchTargets) checks.push(this.touchTargets(options.minimumTarget));