Hey, so I'm looking over some HS hands lately, I found an intresting hand. How to understand this play by Linus? Maybe he don't have a 5bet range this deep, so he balancing this play with his AA,KK region?

jinmay (BU): $13,146.60 (263 bb)
LLinusLLove (SB): $25,730.61 (515 bb)
OBORRA (BB): $5,423.35 (108 bb)

Pre-Flop: ($105)
jinmay (BU) raises to $125, LLinusLLove (SB) 3-bets to $625, 1 fold, jinmay (BU) 4-bets to $1,850, LLinusLLove (SB) calls $1,225

Flop: ($3,780) 6♠ 4♥ 6♥ (2 players)
LLinusLLove (SB) checks, jinmay (BU) bets $831.16, LLinusLLove (SB) raises to $23,870.61 (all-in), jinmay (BU) calls $10,455.44 (all-in)

First Turn: ($26,353.20) 8♣ (2 players, 2 all-in)

First River: ($26,353.20) 2♥ (2 players, 2 all-in)

Second Turn: ($26,353.20) J♥ (2 players, 2 all-in)

Second River: ($26,353.20) T♥ (2 players, 2 all-in)

Total pot: $26,353.20 (Rake: $2)

First Showdown: Board: 6♠ 4♥ 6♥ 8♣ 2♥

LLinusLLove (SB) shows A♠ K♠ (a pair of Sixes)
(Equity - Pre-Flop: 72%, Flop: 53%, Turn: 66%, River: 0%)

jinmay (BU) shows K♥ 7♥ (a flush, King high)
(Equity - Pre-Flop: 28%, Flop: 47%, Turn: 34%, River: 100%)

jinmay (BU) wins $13,175.60

Second Showdown: Board: 6♠ 4♥ 6♥ J♥ T♥

LLinusLLove (SB) shows A♠ K♠ (a pair of Sixes)
(Equity - Pre-Flop: 72%, Flop: 53%, Turn: 0%, River: 0%)

jinmay (BU) shows K♥ 7♥ (a flush, King high)
(Equity - Pre-Flop: 28%, Flop: 47%, Turn: 100%, River: 100%)

jinmay (BU) wins $13,175.60