Solve Privately. On Your Machine.
5-card and 6-card PLO, Big O, Hold’em and Short Deck. Stand Up (Nit) Game, Squid and Double Board Bomb Pots. MTTs with ICM, Bounty Tournaments and 4-way postflop spots. Built for speed and accuracy.
Not ready for a solver? Start in your browser with HydraViewer packs when you want to study without installing one.
Solve & Study — a 6-card PLO flop mid-solve: every hand class under Check, Bet 33% and Bet 75% with its frequency, EV in big blinds and combo count.
The same node as a hand chart — rows by hand class, columns by suit shape, so the betting mass shows before you read a single row.
Dark theme, the same run. Every workspace is drawn for both, and the theme is one click in the top bar.
Export the solved street: a HydraViewer bundle, PPT-style ranges, or JSON — with per-hand EVs when you want them.
The Trainer deals hands from a solved sim and grades the action you pick on EV lost, not on how often the solver picks it.
Session history — where the EV went, by street and by spot type, with every hand you played and what it cost.
The Help Center is in the app, beside the workspace you are in: topics, guided tours and search.
The Tree Wizard writes a whole tree from a few answers — game, stakes, table, sizes — with an example hand that follows every change.
Squid and Stand Up (Nit) Game settle inside the EV rather than on top of it, and so do double board bomb pots.
Rake is solved, not subtracted afterwards: a percentage and a cap in big blinds, or custom rules per street.
Tournament chips priced in money: ICM off a real payout ladder — WSOP Main Event, GGMillion$ final table — with PKO, KO and Mystery Bounty.
Batch Sims runs a board list unattended, with stop rules per sim and the files written as each one finishes.
What it solves
Built for the Next Generation
Build a tree, browse a solve, train a strategy, all from one engine that automatically adapts to the poker game you're studying. Add a card, a player, a bounty or a second board. Learn how variations like Stand Up (Nit) Game or Squid Game change your ranges.
- Pot Limit Omaha
- 6-card PLO
- 5-card PLO
- Big O
- PLO 8
- Limit Hold’em
- Limit Omaha
- Omaha 8 or Better
- NL Hold’em
- Short Deck
- ICM
- Bounty Hunter
- Mystery Bounty
- Bomb Pot
- Double Board
- Squid Game
Value change in tournament chips
Switch from chip EV to ICM and the whole game changes: payouts, players left, stacks and future game all feed the algorithm, so a double-up is valued in real money, not chip count.
PKO and Mystery Bounties are not just solved for the bounty itself. Payout structure, envelopes remaining and chips-per-dollar are all inputs HydraSolver uses to calculate the optimal strategy.
Crush your private games
Antes, straddles, double board bomb pots. Stand Up (Nit) Game, or Squid Game. Solve every variation, including minimum VPIP strategies.
Each one is modeled where the pot settles, inside the solver. Not bolted on afterwards. Rake is configurable and saved with the run.
Lock a strategy, then attack it
Pin the frequencies you want at any node and leave the rest free. HydraSolver solves around your locks, so you can study what beats a population tendency — not just equilibrium.
In the app
Integrated Help Center
We guide you through building a sim, running it and exporting strategies. HydraSolver's built-in Help Center covers getting started, tournaments, side games and reading strategies.
Tree builder
Positions, stacks, antes and bet sizings, street by street. Write
sizing rules once (RFI, 3BETISO,
FLOP.CBET.3BP, sizes like 3x+1bb), save
them as presets and apply them to the whole tree. Undo and redo as
you go. The integrated Tree Wizard makes things easier.
Postflop solves from a preflop solve
Stop on any node of a solved preflop tree and build a flop, turn or river solve from it. The ranges come with the node — no export, no retype. Queue a texture batch and let it run the boards.
Solve on your terms
Stop on exploitability, drift or convergence — per solve, so each board in a batch finishes on its own. Pause, resume and re-solve any time. Pick your thread count, or run single-worker when two solves have to match exactly.
Read the strategy properly
Frequencies and EV per hand. Toggle hand list and hand chart the
same way you would in HydraViewer. Filter with real syntax
($ds, AA, suits and connectivity),
group or expand combos, sort any column, switch chips and big
blinds. Blockers are built in — you don’t have to infer them.
Trainer
Deal the spot and get graded hand by hand by EV loss. Accuracy, streak, EV lost and where it went. Practice shows what to fix, not just that you were wrong. Sessions export.
Take it with you
Save as .hdr and reopen or resume later. Export one
street as .hdv and open it in
HydraViewer in a browser, or as PPT
.txt (one file per action) or per-bucket
.json. Ranges as PPT, Pio, CSV,
.p4rg, or a template you define.
What it needs
System requirements
Three numbers matter: how much RAM you have, how much free disk, and which OS you run. RAM decides what you can solve — more players, deeper stacks and more hole cards each cost memory. Cores only decide how fast it finishes.
Desktop OS
Windows 11 or Server 2022+, 64-bit
HydraSolver is a Windows desktop application. It installs to Program Files (one administrator prompt). Need a remote box instead? See server rental.
RAM (memory)
32 GB minimum
128 GB+ recommended
Disk space
500 GB free to install and run
- App + abstraction maps ~450 GB
- Working room while solving ~50 GB
- Saved solves (yours to keep) extra
Rough RAM by tree
These figures are approximate — coarser settings use less, finer settings use more. Hit Size in Build for the real number on your tree before you start.
| Your RAM | Comfortable | Stretching it |
|---|---|---|
| 32 GB | 3-way NL / PLO | Heads Up Postflop |
| 128 GB | Bomb Pots | 4-max PLO5 / PLO6 Preflop |
| 512 GB+ | 6-max PLO5 / PLO6 Preflop | Deeper Stacks / Multiple Bet Sizing’s |
The Detail setting trades memory for accuracy, so the same tree costs more RAM on High and less on Standard. Need more than your desktop has? Rent a server →
License
Buy HydraSolver
HydraSolver
$899
Dual · 2 machines — $1,299
Store is in Stripe test mode — no card is really charged, and buying is switched off on the public site.
How do I run solves?
HydraSolver ships with an integrated Help Center. You'll learn everything from the basics (getting started, building trees) to node-locking ICM solves like a GTO crusher.
Looking for something that opens in a browser instead?
HydraViewer
Not ready for the full solver?
Start in your browser, today
HydraViewer is where ranges exported from HydraSolver get read. Nothing to install, nothing to solve. Open it and the strategy is on the screen.
It is also the sensible way in if a full solver is more than you
need right now. Browse .hdv packs on
HydraViewer, load one in the browser, and study without a license or a
solve of your own.
- Opens ranges you export from HydraSolver.
- Runs in the browser, on a laptop or a phone.
- Packs load in the browser — no install to read them.
Which one do I want?
| HydraViewer .hdv |
Read a solved spot in the browser. No install, no license, nothing to configure. Start here. |
|---|---|
| HydraSolver .hdr / .hds |
The finished solve itself, opened in HydraSolver. Every node, every EV, resumable. Needs a license. |
| HydraSolver your own solves |
Build and solve whatever spot you want, on your own sizings. Needs a license. |
Server rental
Rent the machine to run it on
Big trees want cores and memory more than anything else. Configure what you need, leave an address, and we will come back with a price. No account, no card, nothing reserved until you say so.
Questions
Common questions
HydraSolver vs HydraViewer — which do I want?
HydraSolver is the desktop software that builds and solves
trees. HydraViewer lets you study solved strategies in the
browser. You can export a .hdv from HydraSolver and
open it there.
What do the licenses cover?
Full private use of HydraSolver, all game maps and updates for 1 year. A Single License activates 1 machine; you can change computers up to 3 times per month. A Dual license allows you to open / run solves on 2 machines at the same time.
Do I need HydraSolver to open an HDS Shop solve?
Yes. .hds files open in HydraSolver, so you need a
license. To study in the browser without one, get a
.hdv pack for
HydraViewer.
Is there a free trial?
No. You can get started with Free HDVs in HydraViewer — the web-based strategy viewer and trainer for HydraSolver exports.
What happens when the year runs out?
The solver becomes read-only. You can still open, browse, train, and export your existing solves. You cannot start a new solve until you renew.
Can I move it to a different computer?
Yes, on either license. Release the activation from Settings → License on the old machine, then activate the new one with the same license id. A Single license holds one activation at a time and a Dual holds two, so a Dual can simply run on both. Releases are for real moves: three per 30 days on a Single, four on a Dual. An activation that sits idle for 120 days frees itself, and support can clear a seat if a machine dies before you release it.
If I purchase a Dual license, is there any expiry on activating the 2nd one?
The Dual license comes bundled as one license, same start (day of purchase) and end date.
What hardware do I need?
Windows 11 (or Server 2022 and newer), 64-bit. You need 32 GB of RAM at a minimum, and 128 GB or more is recommended. Plan on about 500 GB of free disk to install and run, plus room for saved solves. See System requirements for what fits at each RAM size.
Do I have to rent a server?
No. HydraSolver runs on a normal desktop. Renting a server is optional if you need more RAM or cores.
How do I download the app?
After you buy a license, the download is available immediately. You will receive an email with your license ID. Paste it inside the HydraSolver software — Settings → License — then hit Refresh to activate.
How do I learn the app?
HydraSolver has a Help Center with searchable guides for building solves, reading strategies, and training.
Can I pay with Bitcoin?
Yes. You can pay by card or Bitcoin at checkout.
Contact
Get in touch
Questions about a license, a solve, or a server? Send a note and we will reply to your email.
Buy a license,
then rent a server if your desktop isn't enough — we will set up HydraSolver on a Remote Desktop, ready for you to connect