Where the challenge is: systems — knowing how it works.
One achievement, three platforms, three different rarity numbers
Tournament Master
Each platform measures its own player population.Why that matters
Each platform calculates rarity from its own player population. These percentages are shown side by side but are not a controlled comparison. Percentages are shown exactly as each platform publishes them — Pyroblast does not recalculate them or mix player populations together.
How hard is Chess Ultra?
Where the challenge is: systems — knowing how it works. You get through it by working out what the game is actually doing and coming back with a better build or a better plan, not by faster hands.
Finishing it
Chess Ultra has an ending, but nothing in its achievement list marks it clearly enough to trust — so there's no finish rate to show.
Rarest achievements
Published rarity by platform.
Steam
Tournament ChampionWin a 32 player tournament0.5%
Tournament MasterWin 20 tournaments0.5%
Tournament ProWin 5 tournaments0.5%
Boden's Mate0.6%
Epaulette MateDeliver checkmate where the King is blocked on both sides by his own Rooks0.6%
Xbox
Tournament MasterWin 20 tournaments0.2%
Tournament ChampionWin a 32 player tournament0.2%
Tournament ProWin 5 tournaments0.2%
Boden's MateDeliver checkmate by two crisscrossing Bishops, with the King's escape blocked by friendly pieces0.3%
Problem SolvedComplete all the chess challenges0.4%
Played Chess Ultra? See how many of these you've got.
- Which ones you've earned — and which you're missing
- Your rarest unlock, and where it ranks
- Your whole history for this game, on one timeline
- Steam, PlayStation, Xbox and Battle.net in one place
Free. Takes about a minute.
About Chess Ultra
Introducing Chess Ultra; the most breathtaking chess game ever made. Experience stunning 4K visuals, seamless online multiplayer, Grandmaster approved AI and full VR compatibility.
How rarity is calculated
Each platform calculates rarity from its own player population. These percentages are shown side by side but are not a controlled comparison.
- Steam — Valve's published global unlock percentage across Steam owners of the game.
- Xbox — Microsoft's published rarity percentage across Xbox players.
Percentages are shown exactly as each platform publishes them. Pyroblast does not recalculate them and does not mix player populations together. Data updated .