- Wakizashi0.0050 ETH
- Katana0.0250 ETH
- Ōdachi0.1000 ETH
Duel other players for the pot they are sitting on. Win and it climbs — by less every time. Then take it, or hold the hill and find out whether the next challenger is worse than you.
Three steps, then a decision.
Stake in
Pick an arena and pay its fixed stake. If the hill is empty you take it uncontested at 1.00×. If someone is holding it, you fight them for it.
Duel
Best of three. Both players commit a hidden move, then reveal. Strike beats feint, parry beats strike, feint beats parry. No dice, no oracle — the contract resolves what you both actually played.
Cash out or push
Win and the loser’s stake feeds your pot. You get sixty seconds alone with it: take the money, or hold the hill and find out whether the next challenger is worse than you.
Three moves. No dominant one.
Pick a move to see how it resolves. Ties are re-fought and don’t count toward the three.
Strike beats feint, loses to parry, and ties itself.
Every win pays less than the last.
Each defence credits 10% less than the one before it. A tenth straight win adds under 39% of a stake. That is why the pot converges instead of running away — and why holding gets harder to justify the longer you do it.
| Streak | Pot (ETH) | Multiplier | This win added |
|---|---|---|---|
| 1 | 0.0000 | 0.00× | — |
| 2 | 0.0000 | 0.00× | 0.0000 |
| 3 | 0.0000 | 0.00× | 0.0000 |
| 5 | 0.0000 | 0.00× | 0.0000 |
| 8 | 0.0000 | 0.00× | 0.0000 |
| 12 | 0.0000 | 0.00× | 0.0000 |
| 16 | 0.0000 | 0.00× | 0.0000 |
| 20 | 0.0000 | 0.00× | 0.0000 |
The curve tops out near 9.38×. Nobody gets to infinity, and pretending otherwise would be the interesting part of the game removed.
Three arenas. Pick your exposure.
The marks to beat.
The things worth asking first.
Another player. There is no house on the other side of your bet. One player holds a hill along with whatever pot has built up on it, and you pay that arena's stake to fight them for it, best of three. Win and the pot is yours to keep or defend. Lose and your stake goes into the pot you just tried to take.
None at all. Strike beats feint, parry beats strike, feint beats parry. Both players submit a hashed move, then reveal it, and the contract settles whatever the two of you actually played. There is no dice roll, no oracle, and no server deciding anything. Your hash is tied to your address and to that specific clash, so nobody can copy your move or reuse an old one.
No. You submit a hash rather than a move, and neither side can reveal until both have committed. The salt hiding your move is 32 bytes of randomness generated in your browser, so guessing it is not realistic. One thing worth knowing: that salt is stored in this browser. Clear your site data mid-duel and you will not be able to reveal, and an unrevealed move forfeits the duel.
The protocol takes 3%, always from whichever side loses value. It never touches your stake when you claim an empty hill, and never touches a pot you are simply holding. That is why a new Champion always reads exactly 1.00×. You also pay network gas, which is small on Robinhood Chain.
Each defence credits 10% less than the one before it. A tenth straight win adds under 39% of a stake. The pot settles toward a ceiling instead of running away, and that is deliberate. Holding needs to get harder to justify the longer you do it, otherwise cashing out would never be a real decision.
Missing a commit or a reveal deadline forfeits the whole duel, not just that clash, so disappearing is never cheaper than playing a bad hand. If neither player shows up the duel voids, the challenger is refunded minus a small fee, and the Champion keeps the hill. If you are holding a hill and go quiet for five minutes, anyone can cash you out, and you receive your full pot. Nobody loses money for stepping away.
Read your address, and ask you to sign transactions that you approve one at a time in your own wallet. Katana never requests a token approval or a spending allowance, never asks you to sign a message just to log in, and cannot move funds for you. The only transaction that spends anything is the one where you pay a stake, and the amount is shown before you sign.
In the arena contract, and it leaves through exactly one door: you withdraw it to your own address. Winnings are credited to a balance you own rather than pushed out to you, so a failed transfer cannot strand a settlement. The owner key can pause new duels but cannot touch pots or balances, and cash-outs and withdrawals keep working even while paused.