Here is scenario in which KT makes the postseason with 10 additional wins (53 total).

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
          Hanwha	98	44	2	0.6901	0.0
             SSG	96	45	3	0.6809	1.5
           Lotte	94	46	4	0.6714	3.0
              LG	95	47	2	0.6690	3.0
              KT	53	86	5	0.3813	43.5	See explanation of tie-breakers below.
          Doosan	53	86	5	0.3813	43.5	See explanation of tie-breakers below.
              NC	52	85	7	0.3796	43.5
             KIA	53	87	4	0.3786	44.0
          Kiwoom	53	87	4	0.3786	44.0
         Samsung	53	87	4	0.3786	44.0

Explanation of Tie-breakers:
Doosan and KT tie for fifth place and play a post-season game; the winner goes on to the wild-card game.

To construct the scenario, we start with the current standings:
            Team	W	L	D	GL	PCT	GB
          Hanwha	49	33	2	60	0.598	0.0
              LG	46	37	2	59	0.554	3.5
           Lotte	46	37	3	58	0.554	3.5
             KIA	45	37	3	59	0.549	4.0
             SSG	42	39	3	60	0.519	6.5
              KT	43	40	3	58	0.518	6.5
         Samsung	43	41	1	59	0.512	7.0
              NC	37	40	5	62	0.481	9.5
          Doosan	34	48	3	59	0.415	15.0
          Kiwoom	26	59	3	56	0.306	24.5

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	7	0	3	0	0	6	3	0	19
Hanwha	7	-	8	6	8	3	1	4	8	4	49
KIA	0	0	-	0	3	0	0	2	3	0	8
Kiwoom	6	0	4	-	4	0	0	7	6	0	27
KT	0	0	0	0	-	0	0	1	9	0	10
LG	8	3	8	7	9	-	5	5	4	0	49
Lotte	7	5	7	7	4	3	-	7	6	2	48
NC	1	0	7	0	7	0	0	-	0	0	15
Samsung	0	0	3	1	0	0	0	6	-	0	10
SSG	9	3	6	7	8	4	3	7	7	-	54
-----------------------------------------------------------------------------------
Losses	38	11	50	28	46	10	9	45	46	6

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

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	-	4	9	7	7	4	4	8	8	2	53
Hanwha	12	-	13	15	13	7	5	11	13	9	98
KIA	7	3	-	6	10	4	6	6	6	5	53
Kiwoom	9	1	8	-	7	3	2	9	9	5	53
KT	7	3	5	9	-	4	4	4	14	3	53
LG	12	8	12	13	12	-	9	11	10	8	95
Lotte	12	11	10	14	10	6	-	11	13	7	94
NC	6	4	10	6	12	5	4	-	3	2	52
Samsung	7	3	10	6	2	6	3	12	-	4	53
SSG	14	7	10	11	13	8	9	13	11	-	96
-----------------------------------------------------------------------------------
Losses	86	44	87	87	86	47	46	85	87	45

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

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