X-Git-Url: http://winboard.nl/cgi-bin?a=blobdiff_plain;f=backend.c;h=f733800ab28842b4340fa6a731c6e4671add5ae1;hb=240221c6158003a163aecb1efbe207bae058683d;hp=3f6229da29fab8839781c7a70822004c2e7b732d;hpb=37ba6fd87b2253e7ae140be53b49933cd5bc951e;p=xboard.git

diff --git a/backend.c b/backend.c
index 3f6229d..f733800 100644
--- a/backend.c
+++ b/backend.c
@@ -13553,6 +13553,11 @@ TwoMachinesEvent P((void))
 
     if (appData.noChessProgram) return;
 
+    if(second.protocolVersion >= 2 && !strstr(second.variants, VariantName(gameInfo.variant))) {
+	DisplayError("second engine does not play this", 0);
+	return;
+    }
+
     switch (gameMode) {
       case TwoMachinesPlay:
 	return;