I would also like clarification about the promotion rules. The way I interpreted the rule as you wrote it, promotion to queen would be mandatory if you didn't have one, otherwise mandatory promotion to wildebeest. Which bothered me, because in my current game with Greg Strong, in one quite possible line, I would prefer wildebeest to queen. Underpromotion is a great mechanic, so it would be nice to be able to promote to lesser pieces if desired.
I would also like clarification about the promotion rules. The way I interpreted the rule as you wrote it, promotion to queen would be mandatory if you didn't have one, otherwise mandatory promotion to wildebeest. Which bothered me, because in my current game with Greg Strong, in one quite possible line, I would prefer wildebeest to queen. Underpromotion is a great mechanic, so it would be nice to be able to promote to lesser pieces if desired.