others cannot be indicated at all, but they could still occur in the\r
initial setup (where you specify them by number, not letter).\r
\r
+Pieces with negative values are considered royal. If one side has more than\r
+one royal piece of the same type, he loses if the _last_ one is captured,\r
+with the special rule that he is not allowed to leave more than one of\r
+them under attack. This means the 'spare' royal pieces can be sacrificed,\r
+and the exchange value assumed for them will be the absolute value of what\r
+you define for them.\r
+\r
NOTE: piece value 181 for piece 7 is reserved for Makruk, and enables\r
promotion on the 6th rank. Do not use it in other variants.\r
\r