Skill is the card you drop. Chance is the card you have not seen.
A risk matrix can name information, discard risk, drop cost and a session stop. It cannot name an edge percentage.

Four columns this desk will actually fill
Information: which ranks and suits have already been discarded. Discard risk: whether the card you throw completes a neighbour's obvious run. Drop cost: first-turn versus middle versus invalid show. Session stop: the clock you wrote before the first deal.
Those four columns are the whole matrix. There is no fifth column for "edge". There is no sixth column for a promised payout. If a writer fills those, the sentence is marketing, not a skill note.
Rule-true facts: a pure sequence cannot hold a joker; an invalid show is usually the dearest line; a first-turn drop is usually cheaper than a middle drop. Editorial judgement: whether your current six cards still have a pure-sequence path. Keep those labels visible.

Turn-by-turn tree, written as prose
Turn one. If the first six cards cannot form or approach a pure sequence, take the printed first-turn drop. Staying is a chance bet on the closed pile.
Turn two to four. If a pure sequence exists, throw the highest unmatched face card that does not look like a gift to an open pickup. If it would complete a three-card run you have seen a neighbour collect, throw a lower safe pip instead.
Later turns. Hold a sequence rather than break it to chase a set. Breaking a pure sequence to "improve" is how invalid shows are born. After N failed approaches to a second group, stop and drop if the printed middle cost is still cheaper than a likely full count.
Last turns. If a declare is legal, declare. Fishing for a prettier leftover is chance. The tree ends at the limiter, not at a win.
Drop after a bad first draw
A bad first draw is six cards with no suited pair of neighbours and no rank triple. The skill line is the printed first-turn drop. The chance line is hoping the seventh card invents a run.
Players stay because leaving feels like waste. Waste is already on the table. A middle drop later will cost more. That is the mechanism, not a pep talk.
Hold a sequence. Do not break it to chase a set.
A held 6-7-8 of hearts is the legal floor of the hand. Breaking it to free a 6 for a set of sixes removes the only pure sequence. The set cannot rescue an invalid show.
If you must break something, break a dirty group that already uses a joker, not the pure run.

Stop after repeated invalid-show risk
If two approaches to a declare failed because a sequence was missing, the third approach is usually pride. Write a stop after a named number of failed approaches. This desk uses three as an editorial example, not as a crowncasino rule.
What remains chance after skill is spent
The closed pile. The other seats' hidden holdings. The next wild. Shuffle order. None of those become skill because you stared longer.
A riffle still is a reminder that order is made by the mix, not by a forecast. The first-hand walk stays the legal path. The limiter stays the stop.

What is rule-true versus editorial judgement
Rule-true: grouping laws, drop cost order, invalid-show definition. Editorial: when to stop after failed approaches, which unmatched face card is "high", whether Pool is the wrong sitting tonight. The second list can be wrong. The first list should be checked against house text.
Sibling notes for format, review and limits
Format objects live on Tables. Lists and timers live on Reviews. The limiter lives on Responsible play.
Pride is how a third failed declare happens
The tree in the standing note stops after a named number of failed approaches. Three is an editorial example, not a crowncasino rule. Pride is the sentence that says one more closed card will invent a pure sequence that six cards refused. That sentence is chance dressed as grit.
A useful check: if you cannot name the unmatched cards out loud without looking, you are no longer tracking information. You are hoping. Hope is not a column in the matrix.
Discard tells remain skill even late. Throwing an open 9 of hearts when a neighbour has already picked 7 and 8 of hearts is a gift. Throw a safe low pip from a broken suit instead. If no safe pip exists, the printed middle drop may still be cheaper than teaching the table how to finish a run.
Skill choices change when the object is Pool
In Pool the drop is a survival choice against a printed target. Staying with a broken hand can push you over 101 or 201. Leaving early can be cheaper than an invalid show. Neither choice wins the pool. Both choices can keep you from crossing the line tonight.
In Deals the same broken hand is one row in a total. A bad first deal can still be repaired if later deals are clean. That is not a reason to break a pure sequence. It is a reason not to treat one deal as the whole sitting.
In Points the sitting can end after one hand. The skill line is sharper. First-turn drop or play the groups you have. The matrix does not grow a luck column for any of the three objects.
A discard you can defend in one sentence
If you cannot defend a discard in one sentence, it is probably a gift. "It does not finish a run I have seen" is a defence. "It felt high" is not.
Pride is the third failed declare. Write the number of failed approaches on the same paper as the session clock. When the number hits, drop or stop. The matrix has no column for stubborn.
Pool changes the meaning of a drop. Survival against a printed target is not the same as a Points one-hand bill. Do not copy a Points drop into a 201 pool without naming the target.
When information runs out
Late in a Deals sitting you may know most discards and still not know the closed pile. That remainder is chance. Spending a pure sequence to chase a set in that remainder is how invalid shows are born. Hold the floor. Throw a card you can defend. Stop when the paper clock says stop.
Skill-boundary questions
Do you publish an expected-value figure?
No. Chance outcomes stay unnamed as percentages.
What is the first skill choice?
Whether the first six cards still have a pure-sequence path.
When is a drop the skill line?
When the printed first-turn cost is cheaper than a likely full count.
Should I break a pure sequence?
No. It is the legal floor of the hand.
What is editorial versus rule-true?
Stop-after-three is editorial. No-joker-in-pure-sequence is rule-true.
Does skill remove chance?
No. The closed pile remains unseen.
Where is the pickup walk?
On /how-to-play/.
What is the next action?
Read this boundary, then return to Tables or the limiter.
Read the skill-boundary chapter
If the matrix is clear, return to Compare formats or PLAY NOW after the lock. If it is not, stay on this tree.