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    public boolean calcBlueSkillSuccess(L2Character activeChar, L2Character target, L2Skill skill)
    {
        int atk = 0;
        int def = 0;
        int modifier = 0;
        switch (skill.getSkillType()) {
            case STUN:
                atk = activeChar.getPAtk(activeChar);
                def = target.getPDef(target);
                modifier = target.getWIT();
                break;
            case ROOT:
                atk = activeChar.getMAtk(activeChar, skill);
                def = target.getMDef(target, skill);
                modifier = target.getDEX();
                break;
            case PARALYZE:
                atk = activeChar.getPAtk(activeChar);
                def = target.getPDef(target);
                modifier = target.getWIT();
                break;
            case SLEEP:
                atk = activeChar.getMAtk(activeChar, skill);
                def = target.getMDef(target, skill);
                modifier = target.getWIT();
                break;
            default:
                atk = activeChar.getPAtk(activeChar);
                def = target.getPDef(target);
                modifier = target.getCON();
                break;
        }

        def = _rnd.nextInt(modifier) * (def / modifier);

        double rateMin = _rnd.nextInt(100);                // Minimum success rate required
        double rate = ((double)(atk - def) / (double)(atk + def)) * 100.0;   // Actual success rate

        if (rate > 100) rate = 100;                     // We shouldn't have more than 100% success rate
        if (rate < 1) rate = 1;                         // We shouldn't have less than 1% success rate

        String msg = skill.getName() + " success rate: " + (int)rate + "/" + (int)rateMin;
        if (activeChar instanceof L2PcInstance)
            ((L2PcInstance)activeChar).sendMessage(msg);

        if (target instanceof L2PcInstance)
            ((L2PcInstance)target).sendMessage(msg);

        return (rateMin <= rate);
    }