Offer bet sizes the table's chips can actually make

Half the pot lands on a half chip constantly. Pre-flop at 1/2 the honest half-pot is $4.50, and the smallest chip in the default legend is a dollar — the tool's own chip breakdown calls it "4×$1, $0.50 no chip covers". The button offered it anyway, so the dealer rounded it themselves every single time. The pot-derived quick amounts now round up to something the table can build. Up, not down or nearest: these are bet sizes, a pot-sized bet that has been shaved is no longer a pot-sized bet, and rounding up cannot drop an amount below a legal minimum the way rounding the other way can. Only when the legend describes this game. A smallest chip larger than the big blind means the denominations were never set for these stakes, and rounding a 5c/10c table up to whole dollars would be the tool doing real damage on the strength of a field somebody forgot to fill in. Those tables keep exact amounts, and the wrong legend stays visible rather than being quietly applied. A table with no legend at all is told nothing about chips and so has nothing applied either. Verified across five tables: default dollar chips at 1/2 give $4/$5/$7, cent chips at 5c/10c keep $0.20/$0.23/$0.35, five-dollar chips at 5/10 give $20/$25/$35, and both the stale-legend and no-legend tables are left exact. The minimum raise is deliberately not rounded. It is what the rules require, and moving it to suit the chip tray would change what is legal rather than what is convenient. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_015bnp7xKUPFFSpwkYNFaPgb
2026-09-02 00:05:26 -06:00
parent 09eac536b5
commit 40fa16920b
3 changed files with 110 additions and 5 deletions
@@ -532,11 +532,26 @@ const Betting = {
    //
    // Facing no bet this is a plain pot-sized bet — toCall is zero and currentBet is
    // zero, so it comes out as the pot, which is the right answer there too.
+    // Rounded up to something the table's chips can actually build. Half the pot is
+    // constantly a half-chip amount — pre-flop at 1/2 it is $4.50, and the smallest
+    // chip in the default legend is a dollar, so the button offered a number the
+    // dealer would have to round themselves every single time.
+    //
+    // Only when the legend describes this game. A smallest chip *larger* than the big
+    // blind means the denominations were never set for these stakes, and rounding a
+    // 5c/10c table up to whole dollars would be the tool doing real damage on the
+    // strength of a field somebody forgot to fill in. Left exact there, and the wrong
+    // legend stays visible rather than being quietly applied.
    potRaiseTo(state, index, fraction = 1) {
        const player = state.seats[index];
        if (!player) return 0;
        const potAfterCall = this.round(this.potSoFar(state) + this.toCall(state, player));
-        return this.round((state.currentBet || 0) + potAfterCall * fraction);
+        const exact = this.round((state.currentBet || 0) + potAfterCall * fraction);
+
+        const step = Money.fromCents(Money.chipStepCents(state.chipLegend));
+        const bigBlind = Number(state.bigBlind) || 0;
+        if (step <= 0 || (bigBlind > 0 && step > bigBlind)) return exact;
+        return Money.upToChip(exact, state.chipLegend);
    },

    // Who turns their hand over first.
@@ -63,6 +63,29 @@ const Money = {
    // Anything the smallest chip can't make comes back as `remainder` rather than being
    // rounded away: a 50c share in a game whose smallest chip is a dollar is a real
    // problem for the dealer to solve, not a rounding error to hide.
+    // The smallest chip the table has said it plays with, in cents. Zero when no
+    // denominations are set, which means the tool has been told nothing about what
+    // chips exist and shouldn't pretend otherwise.
+    chipStepCents(legend) {
+        const values = (legend || [])
+            .map(chip => this.toCents(chip.value))
+            .filter(cents => cents > 0);
+        return values.length > 0 ? Math.min(...values) : 0;
+    },
+
+    // Rounds an amount up to something the table can actually build out of its chips.
+    //
+    // Up rather than down or nearest: these are bet sizes, and a pot-sized bet that
+    // has been shaved is no longer a pot-sized bet. Rounding up also can't drop an
+    // amount below a legal minimum, which rounding the other way can.
+    upToChip(amount, legend) {
+        const step = this.chipStepCents(legend);
+        if (step <= 0) return this.round(amount);
+        const cents = this.toCents(amount);
+        if (cents <= 0) return this.round(amount);
+        return this.fromCents(Math.ceil(cents / step) * step);
+    },
+
    chipBreakdown(amount, legend) {
        let cents = this.toCents(amount);
        if (cents <= 0) return { chips: [], remainder: 0 };