Played two more games today (#11 and #12) and somehow, the secret win condition: encircle is how the win was achieved both times. Encircle involves surrounding a troop on all sides.
We were able to uncover the need for a minor revision to specify that there be a minimum of 5 exposed adjacent squares in order for encircle to be valid. One of the wins only required 3 squares based on the position on the board (with dead spaces also surrounding the encircled player).
Any game that uncovers something is useful. It’s also good to hear that no one is bored with this game despite the fact we keep making people play it. 🙂