Dice duels: crypto dice PvP and jackpot pots

A dice duel game puts a second player where the house would normally sit. CSGORoll, for example, lists Dice-Duels as "1v1 dice battles, where the highest roll wins" alongside its case battles. It publishes no fee for the mode and holds no gambling licence, so it is not listed on this site.

Be careful with names. Standard crypto dice is a single-player game against the house, and some of it carries duel branding: Duel's "Duel Dice" is a house-banked Duel Original, with a base edge of 0.1% that Duel refunds as rakeback within a daily allowance. CaseBattles.gg also lists a game called Duels among its house games, with a 5% house edge.

A dice duel is pure chance. Each roll is fixed by the seeds before it is shown, so no dice duel winning strategy, stake pattern or timing changes the odds. The fee does the damage: at a 5% pot fee, the rate several sites charge on coinflip and jackpots, 100 duels at $10 each cost about $50 on average. Rolling dice for money is gambling, so the same licensing questions apply as for a crypto coinflip, which is the same 50/50 contest with a coin instead of dice.

In jackpot gambling, any number of players pay into one pot before a timer runs out, and one entry wins the lot minus a fee. Your chance equals your share of the pot. As of October 2026:

• PVPspinArena: every cent is one ticket, and 5% of the pot is kept at settlement.
• Solpump: rounds last 60 seconds, your chance is your SOL divided by the total pot, deposits run from 0.001 to 100 SOL, and the winner gets 95%.
• CoinWager: its own example puts 1 SOL into a 100 SOL pot for a 1% chance, with a 5% edge taken from the pot.

Because the fee comes off the whole pot, it includes your own stake. A player who puts in half of a $100 pot and wins collects $95, only $45 more than they paid. The same stake-weighted draw appears as Jackpot mode in case battles, where your chance matches your share of the value unboxed.

Read the bonus and withdrawal rules too. On PVPspinArena, bonus money lost to another player "stays bonus", and you must wager at least half of what you deposited before withdrawing, with a $20 minimum. Solpump's terms cap daily winnings at EUR 100,000.

Provably fair dice uses a commit-reveal scheme, so the site has to fix the result before it knows your bet and can be caught if it changes it later. It has three inputs:

• Server seed: a secret random string chosen by the site. Before any bet the site publishes its SHA-256 hash, which is the commitment.
• Client seed: a string you can set yourself. The site cannot predict it, so it cannot pick outcomes in advance.
• Nonce: a counter that goes up by one with each bet, so the same pair of seeds gives a new result every round.

CoinWager publishes its formula: HMAC-SHA256 with the server seed as key and "clientSeed:nonce:0" as the message; the first 8 hex digits of the output are read as a number and divided by 4,294,967,296 (2 to the power 32); multiplied by 100, that gives a roll from 0 to 100. Its published demo values reproduce exactly with standard SHA-256 and HMAC-SHA256 tools:

How PvP sites adapt it

With two players there is no single client seed both sides trust, so PvP sites replace it with a public seed that nobody, the site included, knows until every play is committed. For its PvP case battles, CSGORoll commits a server seed for each player on joining, takes the hash of an EOS blockchain block that has not yet been mined as the public seed, and uses the PvP play ID as the nonce. CSGOEmpire's coinflip uses a private seed, the round ID and an EOS block mined after the challenger joins, and publishes a verification script (CSGOEmpire).

A verified roll settles one thing: the result was fixed before the bet. The fee, the operator's licence, who holds your balance and whether the other seat is a bot are separate checks, and they matter more on the unlicensed sites where most of these games run.

• The other player is the house. CSGOEmpire lets a site bot join coinflips, and in Suigar's PvP lobby on 27 October 2026 an account named suigar.sui was in every recent duel listed.
• No licence, no complaints route. PVPspinArena names no company or licence, and CoinWager publishes no terms. If a withdrawal stalls, there is no regulator to go to.
• Custody and contracts. PVPspinArena holds your money as a USD balance, while wallet-based dapps carry smart-contract risk: Suigar's terms list "bugs, contract vulnerabilities" among its risks.
• Speed. Rounds settle in seconds, so losses build quickly. GamCare (UK), Gambling Therapy (international) and the NCPG helpline on 1-800-GAMBLER (US) offer free help.

How we decide which of these sites to list is set out in how we review.