Study solves from HydraSolver and train against them. Hold'em, Short Deck, PLO, PLO5 and PLO6, from heads-up to 9-max.
Free, with nothing to install. Files are read locally, in your browser.Nothing you open is uploaded. Only the shop, the contact form and the version check use the network. After one visit HydraViewer works offline.
Need solves?
.hdv files or a folderChrome and Edge remember where each file is and ask to read it again
next visit. Other browsers keep a copy of files under 64 MB; a
bigger one needs importing again next visit. 
Create your own HDVs with HydraSolver.com
Need customised solves for personal use? Send us the details, we'll send you the solves.
Need solves for commercial use in study tools or AI training? Contact us for pricing information. E-mail: support@hydrasolver.com
What you can study
Open an .hdv file and see what every hand does at every decision, and what each action is worth. Then train against it.
Hold'em, Short Deck, and 4, 5 and 6-card Omaha (PLO, PLO5 and PLO6), hi-lo included. Two to nine players.
A whole preflop tree on one sheet, and a chart of every decision with each action’s EV. Save a chart as a PNG, or print a chart book.
Walk the tree street by street, see what the range holds on each board, and compare every flop in a pack.
Play hands out or drill one decision. Every answer is graded by the EV it loses, from Best to Blunder.
Start with two free HDVs. The HDV Shop sells Hold'em, Short Deck, PLO, PLO5 and PLO6 solves: preflop trees from heads-up to 9-max and 10bb to 500bb, PLO5 flops, PLO4 bomb pots, straddles, K Poker and Nit Game.
Solve your own spots on your desktop with HydraSolver. Export any street as .hdv and open it here.
Questions
HydraViewer is a free website for studying solved poker
strategies. Open a .hdv file to study the strategy
and train against it. HydraSolver is the desktop software that computes the solutions.
Yes. HydraViewer is free. You only pay if you buy packs from the HDV Shop.
No. Files you open stay on your computer.
Yes. After you have opened the site once, you can study files already on this device without a connection. Downloading packs from the shop still needs a connection.
HydraViewer lets you study solved strategies in the browser.
HydraSolver is the desktop software that builds and solves trees.
You can export a .hdv from HydraSolver and open it
here.
You can export a .hdv from HydraSolver, download a free pack, or buy a pack
from the HDV Shop. For custom solves, email support@hydrasolver.com.
You can see rake for each sim in the shop — click Details. Our preferred abstraction settings change depending on game-type. Multi-way sims are usually run with Standard resolution while Heads Up sims are usually run with High resolution.
It supports Hold'em, Short Deck, Omaha in four, five and six cards including hi-lo, two to nine players, and tournament solves with ICM and bounties.
No. Open hydraviewer.com and drop a file in.
Yes. You can pay by card or Bitcoin at checkout.
Yes. In Chrome or Edge, use Install in Settings or the browser's install button. On iPhone and iPad, tap Share, then Add to Home Screen. It opens in its own window and works offline.
Contact
A pack question, or something else? Send a note and we will reply to your email.