For me it is/was pretty clear that you have to do a strength test first, and if you fail to do so, you can not actually enter the room. The reason for this was a long look at the "closed door and then straight after a portcullis explanation:

In order to move into the adjacent chamber, Hugo must open the door and lift the portcullis. The door is in Hugo’s current chamber, so he must open it before proceeding to the portcullis.
Hugo draws a card from the Door deck and encounters a “Hidden Trap” card. After the trap is resolved, Hugo’s turn ends without proceeding to the portcullis.
On Hugo’s next turn, he attempts to move into the adjacent chamber again. He must first draw another card from the Door deck. 
This time he draws a “Door Opens” card and can now try to lift the portcullis.
Hugo succeeds at testing his Strength and finally moves into the adjacent chamber.
If Hugo failed the Strength test for the portcullis and wanted to move into the chamber again next turn, he would have to start the process again by drawing a new Door card.

So for my point of view, (removing the closed door, since even if you succeed in opening it you still have to do a strength test to open it) you are in the room you started from (so you have only placed the new tile in front of your hero but you're not standing on it), and have to do a strength test; if you fail you are still in the same room, only if you succeed you will enter the new room and encounter it.

Shmoozer said:

This is all true, however remeber, encountering a portcullis is different from encountering a room. This is significiant when entering an unexplored space. As the rules state, you do not encounter the room until it is explored, (drawn and placed).  Once it is placed, you are in that room and the effects of said room take place.  the idea of the portcullis is to trap you in the room IF you encounter a monster in that room. The portcullis snaps shut when enter, preventing you from escape.  It stats in the card desrciption that you have to draw a Dungeon Card when  you draw the porcullis room tile. If you were not in that room, you could not draw the tile, and the instructions on the tile would be invalid as you never actually entered the room (assuming you failed the strength test)

Although its not specificaly mentioned in the rules, (although it states in the card explanation that you may not escape monsters while in a room with a portcullis), it would seem that if you enter the chamber through a passage where there is no portcullis, you must escape through the way you came. Hence you should be allowed to escape in that direction even if there is a portucllis in a different exit from the room.

SinisterCheshire said:

I have struggled to make sense of the rules for encountering a portcullis and take on board what has already been written in this post. However, I am not sure about the bold I have highlighted from the quote above and would appreciate comments on my interpretation below.

If you attempt to move into an unexplored space the rules state (p.8 col.1) "Heroes step over entry arrows to enter the chamber". This suggests that for a "Portcullis" chamber you don't enter the chamber until you have passed the portcullis (since the entry arrow is positioned after the portcullis). This would mean applying the rules for "Moving through a Portcullis" (p.8 col.2) before applying the portcullis chamber rules on p.31?

It would appear that the portcullis drops immediately after you have passed through it, since once you are in the portcullis chamber and decide to leave by that route "you must test strength. If you succeed, you lift the portcullis ..." (rules p.31)

If the chamber you enter has a portcullis, a hero cannot escape from a monster. This appears to apply to both single passage entry dead end chambers and multi passage entry chambers, even if only one passage contains a portcullis? (pp12 & 31 of rules)?

The rules aren't clear enough with different points.  This is one of them.

Personally, we play as the portcullis close behind you.

This is why:

Page 9 - Hugo's example.  Note that in the picture the tile he is moving into is already in place in the game.  Note that in the example of Lindel's movement (same page), the space where Lindel's moving into has no tile, and in the picture below, they now put the rotating room, so the rulebook uses a different design to show movement into an unexplored space.  In page 27 Tatianna moves into an explored space to show special movement to a bridge tile.  As she moves into a previously explored space, the tile is already in the picture.   So...  Hugo's example must refer to movement into an explored space.  The portcullis was already there and shut in a previous turn.  It needs the test.

Page 31 - Chamber description of the portcullis chamber.  You're moving into an unexplored space, so the tile is put into play and you move into.  The portcullis shut behind, you need the test to go back and exit.  It's a trapped dead end.  What is the point in this chamber if the portcullis is already down?  Unless you're forced to test even when you see it's a dead end...  in that case you need to test to enter and then to exit.  But I agree with Soylentgreen in that the portcullis chambers can be different in having 0-1-2-3 more exits, but the mechanic is still the same. 

Despite the possible interpretation that you're forced to test even when you see the dead end beyond the portcullis  (would it not be an important point enough to be put in the rules?? )...  I'm sure that pg 9 example denotes moving into an explored tile, and pg 31 example move into a just-being-explored tile, and the description tile does not say "you must test to enter the chamber",... the game does not have any chamber that impedes you from entering into in.  Maybe to go back next turn, but not entering into the one you just revealed, it should be an anomaly so important in the game that it would be clarified. 

argente said:

I'm too tired to read back - but that is part of what I tried to argue earlier.

When you encounter a new tile - you don't place the tile down and then decide if you want to go into it or not - you ARE in it - and you encounter it as to what is there.

A room with a portcullis or not - you are already in it when you encounter it. Therefore - to LEAVE you have to test to get out - but not to get in - snaps closed behind you once you are in.

     I've had some concerns about the entering an unexplored space that shows a portcullis where you enter as well. Seems like it would be wise to count the portcullis snapping shut behind you in this circumstance due to things I have experienced in the Treasure Chamber when Dragon Rage is drawn. If you retreated from Dragon Rage into an unexplored space and had to test strength vs. a portcullis, you'd be trapped. On one hand, i guess you could remain in the Treasure Chamber for next turn(with the dragon nipping at your heels). On the other hand, I guess you would have to go to another exit arch. To avoid this ambiguity/confusion. Seems like you need to enter the unexplored space, then the portcullis snaps shut behind you.

     Another situation that would be rare/odd. What if through odd circumstances, every Treasure Chamber exit had a portcullis/door already showing as explored and you got Dragon Rage? I'm curious as to the results and proper procedure for handling this situation. Any responses appreciated.

MrBallast said:

In this horribly unlucky situation, I'd expect dragon rage would over rule any portculli.  Extreme feats of strength when under duress and all.  If someone failed the check, and was still alive and in the Treasure Chamber, they would have the freedom to loot until their hearts content as the single Dragon Rage card in the Dragon Deck has been discarded. Part of the reasoning behind the Dragon Rage, not only to crisp the players, is to ensure that the Dragon Deck is reshuffled.

Another way it would be played I assume, and this is the meaner way to go, is all adventurers in the Treasure Chamber must test strength to lift the portcullis as normal. if they fail, they are trapped, and die.  Cause you can be sure the dragon isn't going to nod off to sleep when he/she's got crispy and tastey adventurers to eat. This way, all the adventurers leave the room and the deck is reshuffled.  Considering the perilous and evil nature of DungeonQuest, I'd assume this would be the proper rule. As its more likely to kill players, and doesnt "break" any game rules or cards.