(posted these long ago on CSW, dusting them off for archival purposes)
A method I've employed successfully to play with hidden units and still surprise yourself is:
- if the Japanese are allowed X hidden units, choose the units you'd like to start hidden and give them X identical additional units.
- before play, fish out 2X minefield tokens - X real numbers and X decoys (if you don't have enough decoys, use decoys & 1's or decoys and 2's...)
- shuffle the minefield tokens face down, and without looking at their numbered sides place them under your chosen JPN units (& their "clones"), these are now all treated as "hidden units"
- play rules-as-written with respect to revealing hidden units, and once revealed (or once attacking/attacked) check the counter underneath - if it's a decoy that unit is removed from play and was never really there, if it's not then carry on.
Strengths of this Method
- Most of the element of surprise is preserved, because as the non-hidden player you don't know if you're manuevering against real enemies or shadows in the bushes.
- Setup is easy and requires no bookkeeping.
- The same scenario will not play out the same way twice because the "ghost unit" allocations are random.
- At start the non-hidden player must face 2X enemy forces, which ably simulates the tension of facing off against an unknown enemy.
Weaknesses of this Method
- As the hidden player you may find your defensive position was just ghosts, and the enemy is allowed to waltz into a sensitive area unopposed.
- There is no mechanism for re-hiding. Though in my experience this happens very rarely so I do not consider it a serious flaw.
- Having to move and manage 2X the OOB for the hidden player can be a burden in large scenarios.
Final Thoughts
In the end, hidden unit scenarios are always best played with... really hidden units! However, should you happen to live alone on a sailboat, or in a hermitage, or just have really offensive body odor... well, these rules might be useful.
I have used them with satisfying results, and I encourage you to try.
All feedback politely considered!