- Some work on the AI for new keywords.

- NPE prevention in AI code.

forge-ai/src/main/java/forge/ai/ComputerUtil.java

@@ -20,6 +20,7 @@ package forge.ai;
 import com.google.common.base.Predicate;
 import com.google.common.base.Predicates;
 import com.google.common.collect.*;
+import forge.ai.ability.ChooseGenericEffectAi;
 import forge.ai.ability.ProtectAi;
 import forge.ai.ability.TokenAi;
 import forge.card.CardType;
@@ -986,6 +987,11 @@ public class ComputerUtil {
         	return true;
         }
 
+        if (card.hasKeyword(Keyword.RIOT) && ChooseGenericEffectAi.preferHasteForRiot(sa, ai)) {
+            // Planning to choose Haste for Riot, so do this in Main 1
+            return true;
+        }
+
         // if we have non-persistent mana in our pool, would be good to try to use it and not waste it
         if (ai.getManaPool().willManaBeLostAtEndOfPhase()) {
             boolean canUseToPayCost = false;

forge-ai/src/main/java/forge/ai/ComputerUtilCombat.java

@@ -1455,7 +1455,7 @@ public class ComputerUtilCombat {
                     continue;
                 }
 
-                if (ability.hasParam("Adapt") && blocker.getCounters(CounterType.P1P1) > 0) {
+                if (ability.hasParam("Adapt") && blocker != null && blocker.getCounters(CounterType.P1P1) > 0) {
                     continue;
                 }
 

forge-ai/src/main/java/forge/ai/ability/ChooseGenericEffectAi.java

@@ -350,7 +350,15 @@ public class ChooseGenericEffectAi extends SpellAbilityAi {
             }
         } else if ("Riot".equals(logic)) {
             SpellAbility counterSA = spells.get(0), hasteSA = spells.get(1);
+            return preferHasteForRiot(sa, player) ? hasteSA : counterSA;
+        }
+        return spells.get(0);   // return first choice if no logic found
+    }
 
+    public static boolean preferHasteForRiot(SpellAbility sa, Player player) {
+        // returning true means preferring Haste, returning false means preferring a +1/+1 counter
+        final Card host = sa.getHostCard();
+        final Game game = host.getGame();
         final Card copy = CardUtil.getLKICopy(host);
         copy.setLastKnownZone(player.getZone(ZoneType.Battlefield));
 
@@ -362,22 +370,22 @@ public class ChooseGenericEffectAi extends SpellAbilityAi {
 
         // can't gain counters, use Haste
         if (!copy.canReceiveCounters(CounterType.P1P1)) {
-                return hasteSA;
+            return true;
         }
 
         // already has Haste, use counter
         if (copy.hasKeyword(Keyword.HASTE)) {
-                return counterSA;
+            return false;
         }
 
         // not AI turn
         if (!game.getPhaseHandler().isPlayerTurn(player)) {
-                return counterSA;
+            return false;
         }
 
         // not before Combat
         if (!game.getPhaseHandler().getPhase().isBefore(PhaseType.COMBAT_DECLARE_ATTACKERS)) {
-                return counterSA;
+            return false;
         }
 
         // TODO check other opponents too if able
@@ -385,13 +393,11 @@ public class ChooseGenericEffectAi extends SpellAbilityAi {
         if (opp != null) {
             // TODO add predict Combat Damage?
             if (opp.getLife() < copy.getNetPower()) {
-                    return hasteSA;
+                return true;
             }
         }
 
         // haste might not be good enough?
-            return counterSA;
-        }
-        return spells.get(0);   // return first choice if no logic found
+        return false;
     }
 }