Read the rule before answering
The city must be a current national capital directly on the main river in this question’s September 2026 reference set. A capital in a Danube-basin country is not sufficient by itself.
Six untimed questions, starting with this one.
Check an answer here
Check this question’s accepted set without submitting to a game or opening the full answer list.
Only your submitted spelling will be checked. Other answers stay hidden.
Read the lesson — reveals answers & strategy
Understand the boundary
Vienna, Bratislava, Budapest and Belgrade make up the four-answer set. The ICPDR names these four capitals in its description of the river. A basin includes tributaries and surrounding drainage areas; that broader geographical relationship does not make every capital in the basin a city on the main Danube.
Verify the facts: ICPDR · Danube River ↗
Choose an answer for your goal
Bratislava earns 90 fixed points, Belgrade 75, Budapest 40 and Vienna 25. Wien is a listed alias for Vienna; Beograd is a listed alias for Belgrade. Use those forms only after verifying them. They preserve the same canonical answer and score, and they do not avoid a matching-answer collision in Battle.
Worked examples — reveals answers
- Bratislava · Accepted
- A national capital directly on the Danube, worth 90 fixed points.
- Beograd · Accepted
- The listed local-name alias resolves to Belgrade and its 75 points.
- Wien · Accepted
- The listed alias for Vienna, preserving the same 25-point answer.
- Bucharest · Outside this set
- Being Romania’s capital does not place the city directly on the main Danube.
Practice the distinction
Pair each accepted city with its country, then recall a backup city without reopening the list. Check Wien and Vienna and compare the result. Next test Bucharest: identifying a capital of a Danube country is a different task from identifying a capital on the river.
Try it in the checker ↑Check the evidence
Sources checked 2026-10-29 UTC with Codex assistance. Facts establish eligibility; the points belong to our independent practice edition.
Give me a hint — no answer revealed
Start with the full category, then apply the exact boundary: Current capital cities directly on the main river, in the September 2026 reference set. You only need one qualifying answer. A longer name is not automatically rarer.
Reveal a verified practice pick
This pick belongs to the selected question’s answer set. Points are a fixed knowledge rating.
Reveal a fast high-scoring answer
Shortest accepted input at 65+ points
BeogradBelgrade · 75 points · 7 characters
Belgrade is a national capital on the Danube River.
Highest fixed score
Bratislava90 points · Shortest accepted spelling: Bratislava
These are editorial points, separate from real player choice counts.
Reveal all 4 practice answers
Filter by a name or listed alias. Scores are fixed knowledge ratings.
4 accepted answers
No answers match these filters. Try another spelling or a lower minimum score.
What players actually choose
– UTC · 0 recorded daily rounds. Source: Krillion io daily submissions. Skips and timeouts are included in the denominator; practice and Battle are excluded.
A comparison needs at least 20 recorded rounds for this question. No rarity estimate is inferred from an empty or small sample.
Question quality signals
These measurements cover completed daily rounds recorded with timing and rejection details. Older rounds without those fields are excluded. At least 20 measured rounds are required per question.
This question has fewer than 20 measured rounds.
Review thresholds: below 20% accepted, at least 40% timed out, or at least 30% of rounds with an unlisted input. These flags suggest checking the wording and answer coverage; they do not prove an answer is wrong or change points automatically. Abandoned rounds and practice attempts are not included.
How these statistics work
- What is counted
- Source: Krillion io daily submissions. Skips and timeouts count as rounds; practice and Battle are excluded.
- When comparisons appear
- A question needs at least 20 recorded rounds. An answer also needs at least 5 recorded choices within that question.
- What the data can tell you
- These anonymous browser records are not verified unique people or a representative survey. The player rarity index does not change game points or predict the original Krillion game. Raw submissions stay private.
Rule examples & common mix-ups — may reveal answers
- Enter a capital city rather than its country. Use the country group and reference date stated in this question.
These notes explain the question boundary; they are not a ranking of player mistakes.
Why these answers qualify
Each entry belongs to the bounded set defined by the prompt. The named source supports the underlying facts; our editorial scoring is a separate layer.
Source: ICPDR · Danube River ↗
Reference version: 2026-09-19. See our answer policy for how we handle aliases and omissions.