Thanks for spotting the error.
Revised Solution:
Bob’s deck consists of:
SP, Scheme, Festival x4, Secret Chamber x3, NV x6, KC x2, masq x3, outpost
Bob plays SP and draws his entire deck. He plays it as follows:
Scheme (to top deck SP at the end of this turn) ->
Festival x4 (to buy the last province on the last turn & allow play of terminals) ->
Outpost ->
SC (discard KC, golem, SC, masq, masq) ->
NV x5 (place KC, golem, SC, masq, masq onto mat) ->
SC (discard KC & NV) ->
Golem (hits KC & NV) ->
KC -> masq (burn 3 cards) ->
NV (draw from mat) ->
SC (discard KC & masq)
Golem (hits KC & masq) ->
KC -> masq (burn 3 cards) ->
masq (burn a card).
Clean up – return SP to deck top
Repeat turn during outpost turn.
There are a large number of cards that can be used to either discard or to top deck. There are enough ways to make actions float around, that Bob could get rid of the festivals by playing a NV or using an extra KC on the scheme to balance actions. Likewise instead of Secret Chamber Bob could use anything that discards or top decks without drawing like: vault, horse traders, young witch, hamlet, mandarin, etc.. You can always add cantrips to balance out the number of cards to discard/top deck & then place on the NV mat.
WW:Yeah, in theory, you could give the other two opponent's decks sufficiently large that they could pile out the coppers & curses before the game ends. You are completely right. I didn't want to specify that precisely in the opening post because I didn't want to make it too obvious that this was a masq-pin puzzle. I was hoping to see some creative thinking, which I did.
Open question: So I've seen several was to increase the number of dead masqs you can play in a turn. KC and TR can allow for 3 and 2 dead masq plays a go, golem can do 2 by itself and up to 4 with a KC/masq/masq setup like here, discard -> NV -> discard -> golem can allow for nested play and outpost can double everything you can come up with provided you have a sufficiently reliable deck (e.g. SP/scheme, KC/Wharf, double haven/double draw, etc.) ... is there any other way to play multiple dead masqs a turn?