No Mercy UNO as a rules dial on the existing tier, not a fourth table: 168 cards,
draw-until-playable, draw-stacking, and the twenty-five card mercy kill. Six
tiers now; a normal game never runs a line of the new code.
The engine is the whole of it so far — the felt hasn't been touched, so there is
no way to play this in a browser yet.
Two things worth knowing.
The normal tiers were mispriced, and had been for a while. They were set against
a naive win rate of 43/32/27%; it now measures 40.3/29.2/23.3%. The bots got
better at some point after the multiples were written down and nobody re-ran the
measurement — which the plan explicitly warns about, because the bots and the
tiers are a pair. Table and Full House had been charging an 18–19% house edge
instead of the 8% they were meant to. All six tiers are repriced off a fresh
measurement, and TestTheMultiplesAreStillPriced now fails the build if they
drift again. It is the test the normal tiers never had, which is how they drifted.
And No Mercy is *easier* than UNO, at every table size, so it pays less. The
mercy rule does not care whose hand hits twenty-five: it kills bots too, and
every bot it buries is one fewer seat that can beat you to the last card. A deck
built to be merciless turns out to be merciless mostly to the table.
The rake test used to assert a payout of 214, which was the 2.2x duel written
down as a number. It failed on a rake that was entirely correct. It derives the
arithmetic from the tier now: the rule is that the house takes its cut of the
profit and never touches the stake, and that holds at any multiple.
Claude-Session: https://claude.ai/code/session_013M5nD7PgUboJXoDcYHzpuJ
aca523e511