Kerslide
All 24 pieces: odds and placement
Kerslide deals 24 different pieces with fixed odds. Knowing which ones come often, and where they fit, makes every hand easier.
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Kerslide uses 24 pieces. Pieces never rotate in your hand: every rotation is its own piece, with its own chance of appearing. This guide shows all of them, how often each is dealt, and where each one is most useful.
How pieces are dealt
You hold three pieces at a time and can place them in any order. When all three are used, a new hand of three is dealt. Each piece is drawn at random, but not with equal odds: larger and more awkward shapes are weighted so the game stays fair. The weights are fixed and the same for every player.
There is one fairness guarantee: every new hand contains at least one piece that fits somewhere on the board. If a random hand would contain no playable piece, one of its pieces is swapped for one that fits. A game can still end when your remaining pieces no longer fit, but you are never dealt a hand that is dead on arrival.
All 24 pieces
1.5% per draw
3.0% per draw
3.0% per draw
4.5% per draw
4.5% per draw
6.0% per draw
6.0% per draw
6.0% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
3.0% per draw
3.0% per draw
3.0% per draw
3.0% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
4.5% per draw
Odds by family
| Family | Rotations | Blocks | Chance per draw |
|---|---|---|---|
| Single block | 1 | 1 | 1.5% |
| Two-block lines | 2 | 2 | 6.0% |
| Three-block lines | 2 | 3 | 9.0% |
| Four-block lines | 2 | 4 | 11.9% |
| 2×2 square | 1 | 4 | 6.0% |
| L shapes (4 blocks) | 4 | 4 | 17.9% |
| Big corners (5 blocks) | 4 | 5 | 11.9% |
| T shapes (4 blocks) | 4 | 4 | 17.9% |
| S and Z shapes (4 blocks) | 4 | 4 | 17.9% |
More than four out of five pieces (84%) have four or more blocks, so planning for long lines and L shapes pays off far more than planning for single blocks, which appear only about once every 67 draws.
Where each piece works best
Single block
The rarest piece and the most flexible. Save it for the one gap that finishes a line.
Two-block lines
Good fillers for narrow gaps at the end of a row or column.
Three-block lines
Common and easy to place. Ideal for finishing a line that is three short.
Four-block lines
Among the most common pieces. They need a straight run of four free cells, so keep long open lanes, especially along the top and left.
2×2 square
Needs a 2×2 hole. Pairs of half-built rows next to each other are the natural home for it.
L shapes (4 blocks)
Four rotations, each fairly common. They finish a line and start the neighbouring one in the same move.
Big corners (5 blocks)
The largest pieces, and the most dangerous on a crowded board. They can finish a row and a column at once, which also moves the board diagonally.
T shapes (4 blocks)
Fit into bumpy edges where a straight piece would not. Useful for repairing ragged lines.
S and Z shapes (4 blocks)
The awkward ones. Place them where a staircase edge already exists, or across two half-built lines.
Three habits that make every hand easier
- Keep a long lane open. Straight four-block pieces and the big corners are common. A free row or column along the top or left side is the safest home for them, and that is also where shifts create new space.
- Place the hardest piece first. If a hand has a big corner and two small pieces, find a spot for the corner while the board still has room, then use the small pieces to finish lines.
- Avoid single-cell holes. Only one piece in 67 fills a lone hole without help. Holes that are two or three cells long are much easier to close.
For how pieces turn into points, see scoring and combos.
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