KK vs 66 Odds: Pocket Kings vs Pocket Sixes
Last updated: May 27, 2026
Pocket Kings (KK) wins 82.4% of the time against Pocket Sixes (66) preflop. 66 wins 15.8% with ties at 1.8%. KK vs 66 (82.4%) is one of the purest and highest-equity domination matchups in poker — equal to AA vs KK. 66 has virtually no winning path except flopping a set of sixes, king-high boards are KK's near-impenetrable fortress, and in 3-bet pots, 66 faces SPR conditions that make set-mining mathematically unprofitable.
The Exact Number: 82.4% vs 15.8%
KK's 66.6-point advantage over 66 is one of the largest in pair-vs-pair poker — matched only by AA vs KK (also 82.4%). The 1.8% tie rate is slightly elevated compared to TT vs 66 (1.7%) because kings appear in more broadway straight combinations (A-K-Q-J-T, K-Q-J-T-9) than tens do, increasing the frequency of board runouts where both hands make identical straights through shared broadway cards.
KK Wins
82.4%
66 Wins
15.8%
Tie
1.8%
66's 15.8% equity is the lowest of any lower pair's equity against KK in the reference table — lower than KK vs 77 (16.2%), KK vs 88 (16.2%), and KK vs 99 (16.3%). The progressive decrease reflects 66's minimal straight draw coverage of boards that also involve kings.
Does the Suit Matter?
Suit combinations affect KK vs 66 by approximately 0.4 percentage points. 66's flush draw when sharing a suit with a king provides minor theoretical equity, but this equity is difficult to realize in practice — 66's flush draw boards often don't also give 66 any secondary equity, and KK on a king-high flush board frequently has a nut flush draw of its own. The 1.8% tie rate is constant across all suit configurations.
Preflop equity by suit combination
Post-Flop: King-High Boards as KK's Fortress
Post-flop in KK vs 66, the board texture determines everything — but far more one-sidedly than in TT vs 99 or TT vs 88. On K-x-x boards (excluding K-6-x set-over-set), KK has 95.7% equity. On 6-x-x boards, 66 has 88.5%. Outside these two primary scenarios, KK is an overwhelming overpair favourite on virtually every other board texture — because 66 has no meaningful straight draw connectivity to boards involving kings.
Equity given specific flops and runouts
Why KK vs 66 Is Pure Domination
The defining characteristic of KK vs 66 as a "pure domination" is the complete absence of shared danger zones. In TT vs 99, both pairs exist in the medium range and boards like 7-8-9-T create scenarios where 99's secondary equity (straight draws near both pairs' ranks) genuinely threatens TT. In KK vs 66, no such board exists. Kings exist at the top of the card spectrum; sixes exist in the lower-medium range. Their board-danger zones are completely disjoint:
66 equity sources vs KK
- Flop a set of sixes (11.8%) × win from there (88.5%)~10.4%
- Low connected board draws (4-5-6, 5-6-7, 3-4-6)~2.1%
- Runner-runner quads or boats~0.8%
- Board-play ties and miscellaneous runouts~2.5%
- Total 66 equity15.8%
Note that 66's total secondary equity (non-set paths) against KK is only ~5.4% — compared to ~6.1% for 66 against TT. The 0.7 pp difference is because kings are less likely to appear on low connected boards simultaneously, meaning even when 66 has a straight draw combination, KK's overpair is slightly harder to beat via board-play than TT's overpair would be.
The Definitive Pair-vs-Pair Matchup Reference Table
Every pocket pair domination matchup in one place. These numbers represent the standard baseline (no suit overlap) computed from full equity simulations.
KK vs 66 (82.4%) ties AA vs KK as the joint-highest pair-vs-pair equity in the spectrum. Notable: KK vs JJ (79.3%) is the lowest KK equity — because JJ is adjacent to KK and creates broadway straight complications. As the lower pair moves further from KK in rank (99, 88, 77, 66), KK's equity generally increases until reaching the maximum at 66.
Definitions
Frequently Asked Questions
What are the exact KK vs 66 preflop odds?
Pocket Kings (KK) win 82.4% of the time against Pocket Sixes (66) preflop. 66 wins 15.8% and ties account for 1.8%. KK vs 66 (82.4%) is one of the highest equity figures in all pair-vs-pair matchups — equal to AA vs KK. The reason: 66 has almost no secondary equity against KK. 66's straight draw boards (3-4-5-6-7, 4-5-6-7-8) are all low boards where KK's overpair is nearly irrelevant to 66's draw completion, and KK's set outs are two powerful cards that completely dominate the board. 66 flops a set approximately 11.8% of the time — that 11.8% is essentially 66's entire winning mechanism.
Why is KK vs 66 one of the purest domination matchups in poker?
KK vs 66 achieves 82.4% equity for KK — matching AA vs KK as the joint-highest pair-vs-pair equity figure — for a structural reason: kings and sixes exist at opposite ends of the medium-pair spectrum. Kings are the second-highest card; sixes are a low medium pair. The boards that threaten KK (ace-high boards, where an ace overcard appears) don't help 66. The boards that give 66 secondary equity (low connected boards like 4-5-6-7) don't meaningfully threaten KK's overpair. There is essentially no board texture that helps 66 while simultaneously pressuring KK in the same way that 9-high boards simultaneously help 99 (via sets) and pressure TT (via straight combinations near both pairs' ranks). KK and 66 simply don't share a danger zone.
How does KK perform on king-high boards against 66?
KK is essentially unbeatable on king-high (K-x-x) boards against 66. On K-x-x boards, KK has flopped top set — three kings — with 95.7% equity. 66 is nearly dead: its only surviving paths are flopping a set of sixes simultaneously (K-6-x boards, the set-over-set cooler giving KK 85.8%), runner-runner quads, or runner-runner full house constructions. On a K-x-x board with no six, 66 has less than 4.3% equity. Strategically, on K-x-x boards with no six, KK should bet for maximum value — there is no hand 66 can have that seriously threatens KK at this point. Even if 66 check-raises, it's doing so with a set of sixes (K-6-x), where KK still wins 85.8%.
Should 66 fold preflop against KK in a 3-bet pot?
Yes — 66 should typically fold against KK in a 3-bet pot, with the possible exception of very deep stacks (150BB+). Set-mining math requires approximately 7:1 implied odds to be profitable: for every bet 66 calls preflop, it must expect to win at least 7 times that amount when it hits its set. In a 3-bet pot, the SPR (stack-to-pot ratio) at the flop is typically 2:1 to 4:1. With a 3:1 SPR, 66 cannot win 7x the preflop call — there simply isn't enough stack remaining relative to the pot. The correct 66 preflop strategy against a known KK holding: fold in 3-bet pots, call in single-raised pots with 100BB+ effective stacks where implied odds are sufficient to justify set-mining.
What is 66's only realistic winning path against KK?
66's realistic winning paths against KK, in order of probability: (1) Flopping a set of sixes (11.8% × 88.5% equity after = ~10.4% equity contribution). This is 66's overwhelming primary path. (2) Low connected boards (4-5-6, 5-6-7, 3-4-6) where 66 flops a set on a board with straight draw potential — adding approximately 2.1% equity via secondary draw combinations. (3) Runner-runner quads or full house constructions (~0.8%). (4) Miscellaneous board-play situations (~2.5%). The practical conclusion: 66's strategy against KK is binary — make a set and win a large pot, or lose. There is no intermediate 'play equity' path that produces meaningful wins.
How does KK vs 66 compare to KK vs 99 and KK vs 77?
KK vs 66 (82.4%) is the highest equity KK achieves against any single lower pair — equal to AA vs KK. By comparison: KK vs 99 is 82.1%, KK vs 88 is 82.0%, KK vs 77 is 82.1%. The non-monotonic pattern (KK vs 66 is higher than KK vs 77, which is equal to KK vs 99) reflects subtle differences in how each lower pair's straight draws interact with king-high boards and the broader flop distribution. 66's straight draws are the most isolated from king range — boards relevant to 66's draws (low connected boards) are the farthest removed from boards that complicate KK's overpair position, giving KK vs 66 the highest equity.
How does KK vs 66 fit into the full pair-vs-pair equity spectrum?
KK vs 66 (82.4%) sits at the top of the pair-vs-pair equity spectrum alongside AA vs KK (82.4%). The full spectrum shows that pair-vs-pair matchups cluster between 79.3% (KK vs JJ) and 82.4% (AA vs KK / KK vs 66), with the highest equity cases occurring when the pairs are maximally separated in rank or when one pair's straight draws are most isolated from the other's danger boards. KK vs 66 achieves the maximum because 66's draw boards are completely disconnected from any board texture that threatens KK's dominant overpair position.
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