
Many players mistakenly believe that the attacker can win a battle by simply rolling a higher number, forgetting that ties and multiple dice comparisons are central to the mechanic.
According to the Risk Official Rulebook, the attacker compares their highest die against the defender's highest die, and ties always go to the defender.
Risk Official Rules 2022, [page not specified]
These rules correspond to the UK edition of Risk.
Official Rule Breakdown
To decide a battle, the attacker and defender compare their highest dice. If the attacker's die is higher, the defender removes one army from the territory under attack. If the defender's die is higher or if there is a tie, the attacker loses one army from the territory they are attacking from. If both players roll more than one die, the process is repeated by comparing the next-highest dice. At no time may a player lose more armies than the number of dice they roll, and the attacker can never lose more than two armies on a single roll.
Step-by-Step
- Step 1: The attacker announces the number of dice they intend to roll and the target territory.
- Step 2: The defender indicates the number of dice they will roll.
- Step 3: Both players roll their dice simultaneously.
- Step 4: Compare the highest die of the attacker against the highest die of the defender.
- Step 5: If the attacker's die is higher, the defender loses one army; if the defender's die is higher or equal, the attacker loses one army.
- Step 6: If both players rolled multiple dice, compare the second-highest dice and repeat the process.
Example Play Situation
Alice attacks Bob in Brazil. Alice rolls three dice (6, 4, 2) and Bob rolls two dice (5, 3). Alice's highest die (6) is higher than Bob's highest die (5), so Bob loses one army. They then compare their next-highest dice: Alice's 4 is higher than Bob's 3, so Bob loses a second army.

House Rules
[HOUSE RULE] Some experienced players use the 'Commanders' variant where, once per turn while attacking, a player may change one of their rolled dice to a '6'.
Common Misconceptions
- Thinking the attacker wins on a tie
- Believing the attacker can lose more than 2 armies in one roll
- Assuming the defender can roll 3 dice
Quick Reference
| You Can | You Cannot |
|---|---|
| You can attack any adjacent territory | You cannot roll more than three dice as an attacker |
| You can continue attacking as long as you have at least two armies on your territory | You cannot leave a territory unoccupied |
| You can use a Risk card to re-roll one die if you have the matching territory | You cannot use a Risk card to re-roll while defending |
Frequently Asked Questions
- What is the official rule for attacking in Risk?
- Compare highest dice; attacker wins if their die is higher, otherwise defender wins ties.
- Can I roll three dice if I only have two armies?
- No, you must have at least one more army than the number of dice you roll.
- What happens if the attacker and defender roll the same number?
- The defender wins the tie and the attacker must remove one army from their territory.
- How many armies can I lose in a single roll?
- You can never lose more than the number of dice you roll, with a maximum of 2 armies per roll.




























