Here is scenario in which KT makes the postseason with 23 additional wins (47 total).

Here are the final standings in the scenario:
            Team	W	L	D	PCT	GB
              LG	112	28	4	0.8000	0.0
          Hanwha	113	31	0	0.7847	1.0
           Lotte	110	31	3	0.7801	2.5
             SSG	90	50	4	0.6429	22.0
          Doosan	47	92	5	0.3381	64.5	See explanation of tie-breakers below.
              KT	47	92	5	0.3381	64.5	See explanation of tie-breakers below.
          Kiwoom	46	94	4	0.3286	66.0
              NC	46	94	4	0.3286	66.0
             KIA	46	95	3	0.3262	66.5
         Samsung	46	96	2	0.3239	67.0

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
              LG	32	17	1	94	0.653	0.0
          Hanwha	30	20	0	94	0.600	2.5
           Lotte	29	20	3	92	0.592	3.0
             KIA	24	24	0	96	0.500	7.5
              KT	24	24	3	93	0.500	7.5
              NC	22	22	2	98	0.500	7.5
             SSG	24	24	1	95	0.500	7.5
         Samsung	24	26	1	93	0.480	8.5
          Doosan	20	27	3	94	0.426	11.0
          Kiwoom	14	39	0	91	0.264	20.0

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	8	9	10	0	0	0	0	0	27
Hanwha	10	-	11	10	11	11	0	10	10	10	83
KIA	1	0	-	1	9	0	0	0	11	0	22
Kiwoom	1	0	8	-	4	0	0	8	11	0	32
KT	0	0	0	5	-	0	0	10	8	0	23
LG	10	0	11	10	11	-	11	11	10	6	80
Lotte	10	11	10	10	10	0	-	10	10	10	81
NC	12	0	12	0	0	0	0	-	0	0	24
Samsung	10	0	0	0	2	0	0	10	-	0	22
SSG	11	0	11	10	11	0	0	13	10	-	66
-----------------------------------------------------------------------------------
Losses	65	11	71	55	68	11	11	72	70	26

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

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	13	11	3	3	0	3	1	47
Hanwha	12	-	15	15	14	13	2	14	14	14	113
KIA	6	1	-	4	12	2	4	2	13	2	46
Kiwoom	2	1	11	-	6	1	0	10	11	4	46
KT	4	2	3	10	-	3	1	12	11	1	47
LG	13	3	14	15	13	-	14	14	15	11	112
Lotte	13	14	12	16	13	1	-	13	15	13	110
NC	14	2	14	4	4	2	3	-	2	1	46
Samsung	13	2	3	5	4	1	1	14	-	3	46
SSG	15	2	14	12	15	2	3	15	12	-	90
-----------------------------------------------------------------------------------
Losses	92	31	95	94	92	28	31	94	96	50

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

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