edit

card.cpp

@@ -1800,11 +1800,14 @@ int32 card::is_equipable(card* pcard) {
 			return TRUE;
 	return FALSE;
 }
+// check EFFECT_UNSUMMONABLE_CARD
 int32 card::is_summonable() {
 	if(!(data.type & TYPE_MONSTER))
 		return FALSE;
 	return !is_affected_by_effect(EFFECT_UNSUMMONABLE_CARD);
 }
+// check if this can be summoned/sp_summoned by procedure peffect
+// check the condition of peffect
 int32 card::is_summonable(effect* peffect) {
 	effect* oreason = pduel->game_field->core.reason_effect;
 	uint8 op = pduel->game_field->core.reason_player;
@@ -1989,6 +1992,8 @@ int32 card::is_can_be_flip_summoned(uint8 playerid) {
 	pduel->game_field->restore_lp_cost();
 	return TRUE;
 }
+// check if this can be sp_summoned by EFFECT_SPSUMMON_PROC
+// call filter_spsummon_procedure()
 int32 card::is_special_summonable(uint8 playerid, uint32 summon_type) {
 	if(!(data.type & TYPE_MONSTER))
 		return FALSE;

effect.h

@@ -401,6 +401,7 @@ inline effect_flag operator|(effect_flag flag1, effect_flag flag2)
 #define EFFECT_UNSUMMONABLE_CARD		336
 #define EFFECT_DISABLE_CHAIN_FIELD		337
 #define EFFECT_DISCARD_COST_CHANGE		338
+#define EFFECT_HAND_SYNCHRO				339
 
 #define EVENT_STARTUP		1000
 #define EVENT_FLIP			1001

field.cpp

@@ -2035,6 +2035,7 @@ int32 field::is_player_can_sset(uint8 playerid, card * pcard) {
 	}
 	return TRUE;
 }
+// check player-effect EFFECT_CANNOT_SPECIAL_SUMMON without target
 int32 field::is_player_can_spsummon(uint8 playerid) {
 	effect_set eset;
 	filter_player_effect(playerid, EFFECT_CANNOT_SPECIAL_SUMMON, &eset);