--- title: "J7s Combos: Count, Blockers, Board Pairs" url: "https://georgelipoker.com/combos/j7s.md" canonical_url: "https://georgelipoker.com/combos/j7s" last_updated: "2026-10-21" type: "reference" summary: "J7s is 4 combos of the 1,326 starting hands (0.30%). See how a known card or a board pair changes the count, plus its rank and equity." related: ["https://georgelipoker.com/combos.md", "https://georgelipoker.com/combos/k4o.md", "https://georgelipoker.com/combos/q4s.md"] --- # J7s Combos: Count, Blockers, Board Pairs J7s is 4 combos of the 1,326 starting hands (0.30%). See how a known card or a board pair changes the count, plus its rank and equity. J7s can be dealt in 4 combos. That is 0.30% of the 1,326 two-card hands, and its 52.33% equity against a random hand ranks it number 75 out of 169. - Combos: 4 - Share of 1,326: 0.30% - Rank of 169: 75 - Equity vs random: 52.33% - This hand and stronger: 40.72% ## J7s: the 4 combos Fix the suit, and the jack and seven of that suit are the only choice; four suits make 4 combos. These are the 4 specific hands that count as J7s. Each tile is one two-card holding, and no two tiles are the same hand. The 4 combos of J7s: Js 7s, Jh 7h, Jd 7d, Jc 7c. ## How cards you can see change the count This is the blocker table for J7s. One visible card of a given rank removes the combos that need it, and the rest stay possible. J7s combos left after one known card of each rank: | Known card | J7s combos left | | --- | --- | | Ace | 4 | | King | 4 | | Queen | 4 | | Jack | 3 | | Ten | 4 | | Nine | 4 | | Eight | 4 | | Seven | 3 | | Six | 4 | | Five | 4 | | Four | 4 | | Three | 4 | | Two | 4 | With a jack or a seven in view, 3 of the 4 combos of J7s remain, which removes 25%. Any card of a different rank leaves all 4 combos in play. ## When the board is paired Boards with a pair remove two cards of one rank at once. The rows give the J7s combos left for each paired rank. J7s combos left after a pair of each rank on the board: | Board pair | J7s combos left | | --- | --- | | Aces | 4 | | Kings | 4 | | Queens | 4 | | Jacks | 2 | | Tens | 4 | | Nines | 4 | | Eights | 4 | | Sevens | 2 | | Sixes | 4 | | Fives | 4 | | Fours | 4 | | Threes | 4 | | Twos | 4 | Only a board pair of jacks or sevens matters here: 2 combos of J7s remain, against 4 for any other pair. ## A worked example Suppose you look down at a jack and a two. Any opponent hand comes from 1,225 possibilities. J7s makes up 3 of them, which is 0.24% (1 in 408); if you held neither card's rank in common with J7s, it would be 4 of them, 0.33%. ## How strong is J7s? Order all 169 classes by equity against a random hand and J7s lands at number 75, in the middle of the ranking, with 52.33%. A tie is worth half a win in that figure. Down to and including J7s, the ranking holds 540 combos, or 40.72% of deals; 536 of them belong to hands above it. ## J7s against ranges of hands Five ranges, five equities for J7s. Counting only the combos your cards leave possible, it has 26.69% against the top 5 percent (60 combos), 32.53% against the top 10 percent (130 combos), 34.85% against the top 20 percent (264 combos), 37.06% against the top 30 percent (386 combos) and 39.85% against the top 50 percent (658 combos). J7s equity against the strongest hands: | Opponent range | Combos in range | J7s equity | | --- | --- | --- | | Top 5 percent | 60 | 26.69% | | Top 10 percent | 130 | 32.53% | | Top 20 percent | 264 | 34.85% | | Top 30 percent | 386 | 37.06% | | Top 50 percent | 658 | 39.85% | J7s is behind all five of these ranges, even the top 50 percent, so it is the underdog on average against each of them. Blockers work on ranges as well as hands. Against the 130 combos of the top 10 percent, J7s leaves an average of 119.00. That is 11.00 combos fewer than the 130 an opponent has before you look. ## Hands next to J7s Look at J7s against the hands that rank next to it. J7s has 44.95% equity against K4o, the hand ranked number 74: it wins 44.60% of boards, ties 0.70% and loses 54.70%. It is the underdog in that matchup. J7s has 42.01% equity against Q4s, the hand ranked number 76: it wins 41.53% of boards, ties 0.96% and loses 57.50%. It is the underdog in that matchup. J7o is what the same two ranks look like when they are offsuit: 12 combos at number 92, 49.68% equity. J7o is 3 times as many combos but 2.64 points weaker against a random hand. Related to J7s: - [K4o combos](https://georgelipoker.com/combos/k4o.md) - [Q4s combos](https://georgelipoker.com/combos/q4s.md) - [J7o combos](https://georgelipoker.com/combos/j7o.md) - [Top 45 percent range](https://georgelipoker.com/combos/range/45.md) - [All starting hands](https://georgelipoker.com/combos.md) - [Hand ranking calculator](https://georgelipoker.com/tools/hand-ranking-calculator.md) - [Poker equity calculator](https://georgelipoker.com/tools/equity-calculator.md) ## Questions about J7s combos **How many combos of J7s are there?** 4 combos, which is 0.30% of the 1,326 two-card starting hands, so you are dealt J7s about 1 time in 331.5. **How many J7s combos are left if I hold a jack?** 3 combos of J7s remain out of 4. With a two as your other card, an opponent has it about 1 time in 408. **Is J7s stronger than J7o?** Yes, by 2.64 points: J7s has 52.33% equity against a random hand and ranks number 75, while J7o has 49.68% and ranks number 92. J7o has 12 combos to J7s's 4. ## How this was computed Combos are counted by listing all 1,326 two-card hands in a 52-card deck and sorting each into its class. The known-card rows remove every combo that uses a card of that rank; the board-pair rows remove those that use either of two such cards. Rank and equity read our table of all 169 by 169 preflop matchups, each counted over every one of the 1,712,304 boards. Ties count as half a win, and a range is weighted by its live combos. Source: GeorgeLiPoker's own count of the 52-card deck and its preflop matchup table. ## Related - [Poker Combos: Count Every Starting Hand](https://georgelipoker.com/combos.md) - [K4o Combos: Count, Blockers, Board Pairs](https://georgelipoker.com/combos/k4o.md) - [Q4s Combos: Count, Blockers, Board Pairs](https://georgelipoker.com/combos/q4s.md)