ATs vs 99 equity
Preflop, ATs beats 99 with exact equity 47.15% vs 52.85%: ATs wins 46.95%, 99 wins 52.65%, ties 0.40%. Computed by exhaustively enumerating all 10,273,824 deals.
| ATs Win | 46.95% |
|---|---|
| 99 Win | 52.65% |
| Tie | 0.40% |
| ATs Equity (win + tie/2) | 47.15% |
| 99 Equity (win + tie/2) | 52.85% |
| Boards enumerated | 10,273,824 |
| Suit combinations | 6 |
| Losing frequency | ATs loses 1 in 1.9 |
Note: class-average values. Specific suit combinations (e.g. shared suits) shift the numbers by a few tenths of a percent.
FAQ
Who wins more often, ATs or 99?
99 is ahead: ATs has 47.15% equity vs 52.85% (exact enumeration).
How often do ATs vs 99 tie?
Ties occur 0.40% of the time (40,605 of 10,273,824 outcomes).
Are these numbers simulated?
No. All 10,273,824 board combinations are exhaustively enumerated — mathematically exact and reproducible.
Related
Figures from app/data/matchup-matrix (exhaustive engine scripts/gen-matchup-matrix.mjs, cross-validated against lib/poker-equity.ts)
Cite this page: Pailiku, “ATs vs 99 equity”, pailiku.com/matchups/ats-vs-99 (2026).