Deckhand
PricingSign in

Playtest

Duel a deck in the browser: yours, a popular one, or any deck we hold.

How do you want to playtest?

The matchup

This deck
Choose a deck to playtestOne of your decks, a popular one, or any deck we hold

Your decks

Sign in to playtest the decks you keep.

Popular TCG decks

The archetypes with the most TCG decks in our corpus since 2026-05-01, one recent deck each. Suggestions only — nothing is chosen for you.

Opponent
Choose an opponentOne of your decks, a popular one, or any deck we hold

Your decks

Sign in to play against the decks you keep.

Popular TCG decks

The archetypes with the most TCG decks in our corpus since 2026-05-01, one recent deck each. Suggestions only — nothing is chosen for you.

GoldfishA copy of the deck you choose that never acts. There is no opponent to choose.
Who goes first?

Who goes first alternates duel by duel. The results measure the bot as much as the deck: both sides are played by the same heuristics.

The rules follow the deck you chooseCredits

Rules engine: YGOPro core (MIT), via koishipro-core.js 1.5.5. Card behaviour: YGOPro card scripts @ b83db1cc3f (GPL-2.0). Deckhand fixes 10 of them in every duel: utility.lua, which every card script shares, The Dragon that Devours the Dogma, Black Dragon Ninja, Branded Beast, procedure.lua, which every card script shares, Elemental HERO Tempest, Portable Battery Pack, Tri-Brigade Revolt, Tri-Brigade Arms Bucephalus II and Remove Brainwashing (GPL-2.0, derived from them: the fixes).