Palenque

Palenque Board Game
Palenque by Alan D. Ernstein (https://boardgamegeek.com/boardgamedesigner/293/alan-d-ernstein), produced by Z-Man Games. (2011)

Pacal, king of the Maya city Palenque, is trying to control all of the Yucatan's resources. As kings of other cities, his opponents have their own ideas. By using your influence to control resources in Kingdoms across the Yucatan, you can establish yourself as the greatest king of the Maya. Build Temples. Alter borders. Control resources.

During the game, players represent the kings who oppose Pacal and use the ten different resource cards and spend action points to expand their empires, dominate the 14 Yucatan kingdoms through their control markers, exchange the opponents control markers, reserve control markers and/or build Temples, scoring every time a Score Card is played by any player.

The player who has amassed the greatest amount of control over the Yucatan Peninsula in each of the scoring rounds is the winner.

BGG
Palenque - Board Game - BoardGameGeek - https://boardgamegeek.com/boardgame/88950/palenque

Limited Walls
Alan Ernstein: "The walls are not a limited item. We never ran out of walls in our playtesting with 70, so it never came up. If you have used walls at the edge of the board, they are unnecessary. If you have simply moved enough walls around that you have run out, I would suggest finding a suitable substitute. I don't know what else to tell you." 

Alan Ernstein: "The wall supply is considered unlimited." 

Temple Placement
Alan Ernstein: "a Temple may be placed adjacent to another Temple." 

Alan Ernstein: "The Temple may be placed anywhere on the board as long as it meets the other 1st marker criteria--that it matches the Icon of the card and it is not next to a wall or edge of the board." 

2 AP Cost Marker Placements
Alan Ernstein: "There are two marker placements that cost 2AP. One is when you place your 1st marker on any empty space that matches your card. The other is when you place your 2nd marker adjacent to the marker you just placed on the board. It is only possible to place two markers in a turn, and the 2nd marker must always be placed next to the 1st marker you placed in the turn and costs 2AP." 

Creating New Kingdoms
Alan Ernstein: "You can create a new Kingdom by moving walls so that an existing Kingdom is split in half. It is not that easy to do with the limitation that each Kingdom must have at least two spaces in it." 

Alan Ernstein: "The wording of the rule actually addresses the adding of one space to the growing kingdom. Therefore, in your example, you have a 1 x 10 kingdom (call it Tikal) adjacent to another kingdom (call it Seibal). When you expand Seibal by moving a space from the center of Tikal (dividing Tikal into a 1 x 5 and a 1 x 4 set of kingdoms) you have increased Seibal by one space and created two kingdoms out of the one formerly called Tikal." 

Reserved Control Markers
From the rules: "If you have a control marker set aside, you may return it to your pool, then immediately use that AP to place that control marker on the board"

Q: "So, if I have a reserved marker on my reference card, will I put it for 1 AP to the board without any conditions?"

A: Alan Ernstein: "Yes. You may return the marker to your pool and use the 1AP for whatever you want. The detail is in the rule so that players know that the marker just returned to the pool is immediately available for use." 

Scenarios of use:

1 I use 2AP to place my 1st marker on a space away from my other markers (I have 1AP remaining); I return a reserved marker to my pool to add 1AP (now I have 2AP); I place a 2nd marker next to the one I just placed (cost 2AP).

2 I use 1AP to place my 1st marker next to an existing marker (I have 2AP remaining); I use 2AP to place my 2nd marker next to the one I just placed (I have 0AP remaining); I return a reserved marker to my pool and add 1AP; I spend 1AP to move any space into an adjacent Kingdom.

Reference Cards Vs Rulebook
"The reference cards have a misprint. They show a cost of 1AP to place your first marker without a non-adjacent marker of the same color. [this should be 2AP]"

Alan Ernstein: "there should be two different costs for the placement of a marker. 1ap allows you to place a marker on an empty space that matches the resource of the card played AND is adjacent to one of your existing markers. 2ap allows you to place a marker on any empty space of the board that matches the resource card you just played." 

MSRP
Some list for $54.99 and some list for $29.99. A good sale can get it under $20.