9 Koi by Triple Profits Games sets a compact three-reel game beside an ornamental koi pond. Ordinary wins use one payline across the middle of its 3×3 board, while Bonus Symbols can stay in place as other positions spin. That gives the central row two jobs: paying matching symbols and building toward the Jackpot Bonus Game.
Quick take: A single middle payline leads into a locked-symbol bonus where each new arrival restores the respin count.
Theme and Gameplay
The koi-and-pond setting gives the small board a clear identity, but the middle row is where ordinary play demands attention. Press SPIN, then look for matching symbols along that active line. Similar symbols elsewhere on the board do not make the same line result.
Persistent Bonus Symbols add something else to follow between spins. When one remains in place, watch the positions around it: three Bonus Symbols across the middle row activate the bonus. Their position matters as much as their presence.
Slot Features
The Jackpot Bonus Game starts with three respins and locks collected symbols in place. New symbols landing in empty positions restore the counter to three. Each arrival therefore adds to the developing board and gives it more time to fill. The round ends when the respins run out or all nine positions are occupied.
The Vault changes the value side of that chase. It collects eligible cash and jackpot-related values and applies a multiplier, while Mystery symbols reveal at the end before accumulated prizes are paid. Filling the entire board produces a separate Grand award. Direct bonus purchase also offers entry to the feature.
Feature focus: Watch both the empty spaces and the respin counter. A new symbol on the last available turn restores the full count, keeping the remaining positions in play.
RTP and Win Potential
The Vault applies a randomly selected multiplier from 1x to 9x to eligible collected values. Its effect depends on what it collects; the multiplier alone is not the prize. Filling the board awards the 500x Grand, the game's highest prize, instead of adding the other symbol values on top.
My Thoughts On This Slot
The middle-row trigger gives 9 Koi a useful connection between ordinary spins and the bonus. A held Bonus Symbol changes what you watch on the next spin, even though the basic line game remains simple. The feature then shifts attention from completing that row to filling the wider board.
That narrow base game may feel limited to someone who enjoys several paying routes on each spin. The more interesting decisions here are visual ones: spotting what has stayed, which spaces remain open and whether a new arrival has extended the bonus. It suits someone who enjoys a compact reel game with a clear collection sequence to follow.
Final Take: 9 Koi makes its middle row matter, then gives the full board a purpose in the respin chase.