Here is scenario in which KT makes the postseason with 0 additional wins (80 total).

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
         Samsung	81	58	5	0.5827	0.0
              KT	80	58	6	0.5797	0.5
             KIA	80	61	3	0.5674	2.0
              LG	78	64	2	0.5493	4.5
          Doosan	75	62	7	0.5474	5.0
           Lotte	65	75	4	0.4643	16.5
              NC	65	75	4	0.4643	16.5
          Hanwha	64	74	6	0.4638	16.5
             SSG	58	79	7	0.4234	22.0
          Kiwoom	49	89	6	0.3551	31.5

To construct the scenario, we start with the current standings:
            Team	W	L	D	GL	PCT	GB
              KT	80	48	4	12	0.625	0.0
         Samsung	78	52	3	11	0.600	3.0
              LG	75	56	1	12	0.573	6.5
             KIA	71	58	2	13	0.550	9.5
          Doosan	67	62	5	10	0.519	13.5
              NC	60	69	2	13	0.465	20.5
           Lotte	59	71	2	12	0.454	22.0
             SSG	58	71	5	10	0.450	22.5
          Hanwha	54	74	4	12	0.422	26.0
          Kiwoom	45	86	4	9	0.344	36.5

The next two tables show, respectively, how many of their remaining games each team wins and ties against each of the other teams in the scenario:

					Scenario Additional Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	0	0	0	0	1	1	3	3	0	8
Hanwha	0	-	0	3	0	0	1	2	3	1	10
KIA	0	0	-	0	3	5	0	0	0	1	9
Kiwoom	0	0	0	-	2	0	2	0	0	0	4
KT	0	0	0	0	-	0	0	0	0	0	0
LG	0	0	0	0	0	-	0	1	0	2	3
Lotte	0	0	2	0	2	2	-	0	0	0	6
NC	0	0	1	0	0	0	0	-	0	4	5
Samsung	0	0	0	0	3	0	0	0	-	0	3
SSG	0	0	0	0	0	0	0	0	0	-	0
-----------------------------------------------------------------------------------
Losses	0	0	3	3	10	8	4	6	6	8

					Scenario Additional Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	0	0	0	2	1	1	0	1	0	2
Hanwha	0	-	0	2	0	0	0	1	1	0	2
KIA	0	0	-	0	0	0	1	0	1	1	1
Kiwoom	0	2	0	-	1	0	0	1	0	0	2
KT	2	0	0	1	-	0	1	0	0	0	2
LG	1	0	0	0	0	-	0	0	0	1	1
Lotte	1	0	1	0	1	0	-	0	0	0	2
NC	0	1	0	1	0	0	0	-	0	2	2
Samsung	1	1	1	0	0	0	0	0	-	1	2
SSG	0	0	1	0	0	1	0	2	1	-	2
-----------------------------------------------------------------------------------
Total	2	2	1	2	2	1	2	2	2	2

The next two tables show, respectively, how many total games each team wins and ties against each of the other teams in the scenario:

					Scenario Total Wins Against
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Wins
Doosan	-	7	9	11	4	5	10	12	9	8	75
Hanwha	9	-	6	7	3	8	11	5	6	10	64
KIA	7	10	-	12	9	9	9	4	9	11	80
Kiwoom	4	7	4	-	5	6	4	7	4	8	49
KT	10	12	7	10	-	10	8	11	4	8	80
LG	10	8	7	10	6	-	8	10	8	11	78
Lotte	5	5	6	12	7	8	-	8	8	7	65
NC	4	10	12	8	5	6	9	-	4	7	65
Samsung	6	9	6	11	12	8	8	12	-	9	81
SSG	8	6	4	8	7	4	8	7	6	-	58
-----------------------------------------------------------------------------------
Losses	62	74	61	89	58	64	75	75	58	79

					Scenario Total Draws (Ties) With
Team	Doosan	Hanwha	KIA	Kiwoom	KT	LG	Lotte	NC	Samsung	SSG	Total
Doosan	-	1	0	1	2	1	1	0	1	0	7
Hanwha	1	-	0	2	1	0	0	1	1	0	6
KIA	0	0	-	0	0	0	1	0	1	1	3
Kiwoom	1	2	0	-	1	0	0	1	1	0	6
KT	2	1	0	1	-	0	1	0	0	1	6
LG	1	0	0	0	0	-	0	0	0	1	2
Lotte	1	0	1	0	1	0	-	0	0	1	4
NC	0	1	0	1	0	0	0	-	0	2	4
Samsung	1	1	1	1	0	0	0	0	-	1	5
SSG	0	0	1	0	1	1	1	2	1	-	7
-----------------------------------------------------------------------------------
Total	7	6	3	6	6	2	4	4	5	7

# KT Wiz magic number
# KT's magic number
# Wiz magic number
# KBO Playoff Race