Recognize drop moves as illegal move

An @-sign as second character now makes Fairy-Max recognize the input
as a move, so that the Illegal-move response is given rather than the
Unknown-command response. It is not really checked if the encoding of
the drop move accidentally coincide with that of a legal move.

diff --git a/fairymax.c b/fairymax.c
index 931099a..91fe48d 100644 (file)
--- a/fairymax.c
+++ b/fairymax.c
@@ -884,7 +884,7 @@ int main(int argc, char **argv)
                 GT = (Side == WHITE ? piecetype : blacktype)[line[4]&31];\r
                 if(GT) PromPiece = (Side == WHITE ? 7 : 7+pm) - GT, GT |= 32 + Side;\r
                 {char *c=line; K=c[0]-16*c[1]+799;L=c[2]-16*c[3]+799; }\r
-                if (m)\r
+                if (m & line[1] != '@')\r
                         /* doesn't have move syntax */\r
                        printf("Error (unknown command): %s\n", command);\r
                 else { int i=-1;\r