One explanation I have read online is that its inspiration was navy battles and therefore you can use the captured pieces. Wikipedia states a possible connection to mercenaries and switching loyalties. Both seem reasonable enough.
I always assumed that the dropping of pieces was an influence of Go which wouldn’t explain the switching loyalties. Still your explanations don’t explain the change in position so it could be a combination of many influences or none of the above, who knows
One explanation I have read online is that its inspiration was navy battles and therefore you can use the captured pieces. Wikipedia states a possible connection to mercenaries and switching loyalties. Both seem reasonable enough.
I always assumed that the dropping of pieces was an influence of Go which wouldn’t explain the switching loyalties. Still your explanations don’t explain the change in position so it could be a combination of many influences or none of the above, who knows