How Stroke Reels work: randomness and return

Each proof generates 15 independent choices between ink and paper, each with a 50% probability. The board is generated once when a proof starts; the staggered reveal of five reels animates that result. Previous wins, losses and button timing do not change the distribution of the next proof. This does not certify an external casino’s randomness.

When playing Kartac from Ireland, it is important to distinguish between our independent demo and the real-money experience offered by the operator. While this site uses virtual coins for free play, you must verify the actual terms with the brand directly.

First, confirm the currency. Most Irish operators display prices in euros (EUR), but you should check the game settings or help page to be sure. Second, review the payment methods. In Ireland, players commonly use debit cards and bank transfers, but Kartac may support other options. You need to check the deposit page to see which methods are currently available to you.

Finally, ensure the operator is regulated by the Gambling Regulatory Authority of Ireland. This body oversees the market and ensures fair play. For practical safety, always check the operator's terms and conditions for responsible gambling tools and verify their licensing status before depositing real money.

• Check if the operator displays prices in EUR.
• Verify that debit cards and bank transfers are supported.
• Confirm regulation by the Gambling Regulatory Authority of Ireland.

Exact enumeration of all 32 possible rows gives an expected return of 96% of virtual stakes in each mode. For 100 coins staked, the expected average return is 96 and expected loss is 4. This is an expectation across many proofs, not a promised result for one play or a short session. A larger stake does not improve return.

Paper separates contiguous ink groups. Ink–paper–ink–paper–ink contains three strokes; five adjacent ink cells contain one. A row pays only when its stroke count matches the selected mode. Fifteen of 32 possible rows qualify for either one or two strokes, and one qualifies for three. Each of the three rows uses one third of the total stake and its return is added to the others.

A total stake of 30 allocates 10 coins to each row. In three-stroke mode, ink–paper–ink–paper–ink returns 30.72 times its row stake, or 307.2 coins. If the other two rows do not qualify, that is the proof’s entire gross return, not its net profit. The game credits whole coins and carries the fractional remainder into later payouts. Its table explains all modes.

This independent demo has three rows and five reels. Each of its 15 cells shows ink or paper with a 50% probability. Before making a proof, choose one, two or three separate ink strokes per row. Adjacent ink cells form one stroke; paper separates them. The first and last cells are not adjacent.

Each row uses one third of the stake. Only a row with the selected number of strokes pays. Its return is based on the square of its ink-cell count and an exact calibration of all 32 possible rows. Long-run return is 96% in every mode, not a promise for an individual proof. The in-game table shows row-return multipliers including that row’s stake.

You start with 1000 virtual coins with no cash value. The balance and fractional coins persist in this browser. A free refill sets a low balance to 1000 coins. No registration, deposit or prizes are involved, and the demo does not reproduce an external operator’s software. Auto runs at most ten proofs and can be stopped.

Choose a stake of 10, 20, 50, 100 or 200 coins and one, two or three strokes. Stake and mode controls lock during a proof so the preselected rules apply. Auto runs at most ten proofs. Stop cancels future scheduled proofs while the current proof settles. The same demo rules apply on mobile and desktop.