Shandalar - Program Bugs

This seems like the bug with suicidal attacks I reported.It seems that if the creature has both first or double strike and protection from the colour of the attacker/blocker AI will not block with such a creature (your case) or will attack the opponent no matter that opponent has such a creature.

[Korath]

It's very possible that this only affects Juggernaut and Erg Raiders (and not even cards functionally identical to them). They're special-cased in the combat AI. (Special-cased to do what, exactly, is unclear.) Cockatrice and Lure (but not Thicket Basilisk) are special-cased to do something else.

[Korath]

#598 related.

I have more info on this behaviour.I attacked with
Guul Draz Vampire ( Card Text:
As long as an opponent has 10 or less life, Guul Draz Vampire gets +2/+1 and has intimidate.)which had no intimidate as AI had 17 life but AI didn't block it with Mirran Crusader.Was AI too afraid of me casting Wake Dancer and gain the 2/2 token from Guul Draz Vampire dying?

More frustrating is the following scenario which still is in the same game as above few turns later.I make a suicide attack as AI will win next turn.AI fails to block 3 out of 5 attacking creatures with and blocks only 1 and looses the game.Only Guul Draz Vampire was unblockable =intimidate at the time AI at 5 life.

AI's 3 creatures that didn't block would have killed my 3 attackers if they blocked them.

[Korath]

I'm starting to think this is another manifestation of the Giant Growth targeting bug, #531, instead. I'm fairly sure that's caused by the AI at replay time getting out of sync with the choices it recorded while speculating; and I was seeing similar blocking blunders quite consistently after playing a card that desyncs the AI (as the target-a-card-in-a-graveyard cards did for a while, including, in extreme cases, the AI blocking non-existent cards off to the right of the actual attackers.