Route Advanced Emperor allied auction funding

docs/RICHESE_AUCTION_RULES.md

@@ -94,6 +94,21 @@ the original native counter/card continuation. Positive Black Market
 self-bidding, exhausted-cache counts and other special-lot boundaries remain;
 the supplied source excludes Richese lots from Ixian Technology.
 
+### Emperor contribution to a Richese lot — 29 October 2026
+
+The authorized supplied revised rulebook, physical p. 15 (printed p. 13),
+Bidding, sends Emperor's contribution to an ally's Treachery Card purchase to
+the Spice Bank. A direct Emperor alliance gift becomes the buyer's own spice
+and follows the normal purchase recipient. This Advanced cutover also applies
+to the connected Richese cache and Black Market sale prototypes: the seller
+receives the buyer-funded portion, while Emperor's contributed portion goes to
+the bank. If Richese buys or retains its own lot, only the buyer-funded portion
+goes to Emperor; the contributed portion goes to the bank. Basic retains its
+earlier payment policy. The original price, donor amounts, and each payment
+destination remain attached to the pending sale rather than reconstructed from
+later balances. Broader optional-module combinations and complete Richese play
+remain unverified.
+
 ## Printed rules, by checkpoint
 
 The source anchor is R2 pp.4–6,10–12: ten cache cards stay outside the hand; one revealed cache lot replaces a normal lot and is declared first or last before Ixian preparation. It uses Once Around or Silent. Other buyers pay Richese; Richese pays Emperor/bank. Discards enter normal discard. Ordinary Karama acquisition is barred. Once Around gives each other faction one ascending bid/pass in a chosen direction, then Richese's final opportunity. Silent reveals eligible bidders' simultaneous offers, including zero, with storm-order ties. A zero result permits cache keep/remove. Advanced Black Market offers one concealed hand card before Declaration, permits all three methods, allows Atreides inspection and unverified sales claims, pays Richese, and shrinks the normal pool only after a sale; no bid means retain. Direct-cache purchases cannot use Ixian allied replacement; Black Market purchases can, even for Richese-family cards. Harkonnen bonus applies to both. Juice of Sapho works in Once Around. Cancellation prevents cache auction at round start or Black Market sale. The special power buys a privately chosen cache card for three spice. [R2](https://www.gf9games.com/dune/wp-content/uploads/2021/11/CHOAM-Rulebook-low-res.pdf)