45 × 45 Together

Select any two tiles or partial groups. If they belong to the same hidden category, they merge and your room earns one point. If not, the room gets one mistake; there is no penalty or mistake limit.

Keep joining matching groups until each has 45 clues. Only then is its category revealed. Complete all 45 groups (1,980 merges) to win. Looking things up is welcome; reading the answers in the source spoils the puzzle.

One fixed 45 × 45 table is shared by everyone. A merged group stays at the second tile’s location; the first tile leaves an empty space. Scroll or swipe in both directions, or tap the bottom-right overview to explore. Pinch with two fingers on a touchscreen or trackpad to zoom around the spot between your fingers; the + and − buttons zoom around the middle of your view, from 20% to 145%. At the furthest zoom levels, tiles become colored markers; zoom in to read their clues. There is no clue search or filtering.

Your selection travels with you: use “Selected” to return to it. On the overview, your window is outlined in ink; colored windows show where friends are looking. Their cursors appear on the table when nearby. Tap an explorer to visit their view, or a connection in the log to jump to its destination. Directions update as you move.

Explorers get temporary anonymous labels; board positions, cursors and the last eight successful connections are shared only in this room. Presence updates several times per second while moving and about once a second at rest. Explorers disappear after leaving or 15 seconds without an update. If friends move at the same time, a stale move is rejected without a penalty.