[quiddity]

1C P 1M (3m) ?
1C P 1D (3m) ?

What are the "expert standard Precision" treatments for pass, double, and 4m cuebid in these sequences? And if opener passes and responder reopens with a double, what does that show?

Does anyone know of a good reference? Most of the precision books I've looked at have multiple chapters on asking bids and little or nothing about simple interference.

[Jlall]

1C p 1D (3x) you can bid just as if they had opened 3x, except with different ranges obviously. But still X is takeout, X and then bidding is flexibility not extra strength, new suit bid non forcing, etc. You can trap pass and expect partner to reopen with the right shape if they dont have a complete yarb etc.

1C p 1M (3x) maybe I am old fashioned but I use penalty doubles, and with my flexible hand types I start with a forcing pass.

[Apollo81]

I also use penalty doubles after 1♣ p 1M (anything)

[effervesce]

Game-forcing auctions normally have X as penalty; with other hands you can pass or bid.

[dake50]

After my 1m force,
Pass forces at 2-level -> we likely have some reasonable contract and
Pass forces at 4-level -> opener likely has enough DT to set.
But 3-level is "best guess" -> offensive hands bid, bad hands quits, DTs X.

Also use transfers here to assure a 2nd bid on slammy while still low.