Maailmantutkija

This document lists all the distribution generator functions that need to be implemented in grids-distributions.js based on the updated grids-rules.js.

Already Implemented (from previous version)

• withBlackCount(count)
• anySymmetry()
• fullySymmetric()
• fitsIn3x3()
• fitsIn4x4()
• onePerRowAndColumn()
• almostOnePerRowColumn()
• max3Neighbors()

Rule 1: At Most 6 Cells

All needed generators already implemented (withBlackCount).

Rule 2: Symmetric (Vertical OR Horizontal)

Positive:

• anySymmetry() ✓ (already implemented)
• fullySymmetric() ✓ (already implemented)

Round-Specific Negative:

• almostSymmetric() - symmetric except for 1-2 cells
• leftRightEqual() - left 3 columns equal to right 3 columns (not mirrored)
• topBottomEqual() - top 3 rows equal to bottom 3 rows (not mirrored)
• copy3X3() - some 3×3 region copied to another location
• leftRightMirror() - only left/right mirror (not vertical axis)
• topBottomMirror() - only top/bottom mirror (not horizontal axis)
• 180degreeRotInv() - 180-degree rotational invariance (not vertical/horizontal symmetry)

Rule 3: Connected (One Blob)

Positive:

• connectedLongSquiggle() - long meandering connected path
• connectedManyBlacks(count) - large connected blob with specified count
• twoBlobsConViaPath() - two blobs connected by thin path
• tree() - tree-like structure (branching, no cycles)
• thinkBlob() - compact thick connected blob

Round-Specific Negative:

• twoLargeComponents() - two separate large blobs (8-12 cells each)
• threeMediumComponents() - three separate medium blobs (5-8 cells each)
• fourSquiggles() - four separate squiggle shapes
• fiveSquiggles() - five separate small squiggles
• many2-4() - many small components of size 2-4

Rule 4: Border Only

Positive:

• borderUniRand() - uniform random on border cells
• threeEdgesRand() - random placement on 3 edges
• twoEdgesRand() - random placement on 2 edges
• corner2x2sRand() - random cells in corner 2×2 regions

Round-Specific Negative:

• noDeadCenter() - everywhere except center 2×2
• on3VerticalStripes() - only on columns 0-1, 2-3, 4-5
• on2HorizontalStripes() - only on rows 0-2 and 3-5
• noCenter2Columns() - not on center 2 columns
• noCenter2Rows() - not on center 2 rows
• corner2x2s() - only in corner 2×2 regions
• noBorders() - only interior (no border cells)

Rule 5: No Isolated

Positive:

• many2-4s() - many components of size 2-4, no isolated
• twoLargeComponents() - (reuse from rule 3)
• threeMediumComponents() - (reuse from rule 3)
• fourSquiqqles() - four separate squiggles (note: typo variant)
• many3s() - many components of size exactly 3
• longSquiqqle() - single long meandering path (note: typo variant)

Round-Specific Negative:

• many1-4s() - mix of sizes 1-4 including isolated
• many1-2s() - mix of sizes 1-2 including isolated
• many1-3s() - mix of sizes 1-3 including isolated
• fourSquiqqlesOne1() - four squiggles plus one isolated cell
• isolatedDots(count) - specified number of isolated single cells

Rule 6: All in One Half

Positive:

• allInOneHalf() - all blacks in one half (top/bottom/left/right)
• allInOneThird() - all in one third (e.g., rows 0-1)
• allInOneCol() - all in single column
• allInOneRow() - all in single row
• allInOneHalfMiddleRemoved() - in one half but not on middle row/col of that half
• allInOneHalfEdgeRemoved() - in one half but not on edge
• allInCorner3x3() - all in one corner 3×3
• allInEdge2x3s() - all in edge 2×3 regions
• allInOneHalfBordersOnly() - in one half, only on borders

Round-Specific Negative:

• noCenter2RorC() - not in center 2 rows or center 2 columns
• noEdge2RorC() - not in edge 2 rows or edge 2 columns
• allInTwoThirds() - fits in two thirds
• allInCorner2x2s() - distributed in corner 2×2 regions
• allInThreeRorC() - all in any 3 rows or any 3 columns
• allInMiddle2RorC() - all in middle 2 rows or middle 2 columns
• allInMiddle4x4() - all in center 4×4

Rule 7: One Per Row/Column

Positive:

• onePerRowAndColumn() ✓ (already implemented)

Round-Specific Negative:

• almostOnePerRowColumn() ✓ (already implemented)
• onePerRowColumnOneMissing() - one per row/col but one row/col empty
• onePerRowColumnOneExtra() - one per row/col but one row/col has 2

Rule 8: Fits in 4×4

Positive:

• fitsIn4x4() ✓ (already implemented)
• fitsIn3x3() ✓ (already implemented)
• fitsIn3x4() - fits in 3×4 window
• fitsIn2x4() - fits in 2×4 window
• fitsIn2x3() - fits in 2×3 window
• twoCompsIn4x4() - two components both in same 4×4
• pentominoIn4x4() - pentomino shape (5 cells) with extras in 4×4
• randomTetris() - tetris-like shapes in 4×4
• sextominoIn4x4() - 6-cell polyomino with extras in 4×4

Round-Specific Negative:

• fitsIn2x5() - fits in 2×5 window (not 4×4)
• fitsIn3x5() - fits in 3×5 window
• fitsIn4x5() - fits in 4×5 window
• sextominoNot4x4() - 6-cell shape that doesn’t fit in 4×4
• septominoNot4x4() - 7-cell shape that doesn’t fit in 4×4
• fitsInTwo2x2s() - fits in two disjoint 2×2 regions
• fitsInTwo2x3s() - fits in two disjoint 2×3 regions
• fitsInTwo2x4s() - fits in two disjoint 2×4 regions
• fitsIn2x6() - fits in 2×6 window (full row/column strip)

Rule 9: Has 2×2 Square

Positive:

• has2x2Plus10-15() - 2×2 square plus 10-15 extra cells
• has2x2Plus15-20() - 2×2 square plus 15-20 extra cells
• has2x2Plus20-25() - 2×2 square plus 20-25 extra cells
• has3x3Square() - 3×3 filled square (implies 2×2)
• has4x4Square() - 4×4 filled square
• multiple2x2s() - multiple 2×2 squares
• has2x3RectPlus() - 2×3 rectangle plus extras
• has3x2RectPlus() - 3×2 rectangle plus extras
• hasTshape() - T-shaped pattern (implies 2×2)

Round-Specific Negative:

• has2x1Plus() - 2×1 domino shapes with extras (no 2×2)
• has1x2Plus() - 1×2 domino shapes with extras (no 2×2)
• hasLshape() - L-shaped patterns (3 cells)
• hasPlusShape() - plus/cross shapes (5 cells, no 2×2)
• hasDiagonal3() - diagonal patterns of length 3
• hasDiagonal4() - diagonal patterns of length 4
• denseCheckerboard() - dense checkerboard pattern
• denseStripedPattern() - dense striped pattern
• denseSpiralPattern() - dense spiral pattern
• denseZigzag() - dense zigzag pattern

Rule 10: Has Cell with 4 Neighbors

Positive:

• plusShapePlus10-15() - plus shape (5 cells) plus 10-15 extras
• plusShapePlus15-20() - plus shape plus 15-20 extras
• plusShapePlus20-25() - plus shape plus 20-25 extras
• multiplePlusShapes() - multiple plus shapes
• has3x3Square() - (reuse from rule 9)
• has4x4Square() - (reuse from rule 9)
• crossShapePlus() - cross/X shape with center having 4 neighbors
• denseBlob4Neighbors() - dense blob with multiple cells having 4 neighbors
• largeBlobMany4Neighbors() - large blob with many cells having 4 neighbors

Round-Specific Negative:

• max3Neighbors() ✓ (already implemented)
• denseMax3Neighbors() - dense pattern where max is 3 neighbors
• longSnake() - long meandering path (max 2 neighbors)
• treeMax3() - tree structure (max 3 neighbors)
• checkerboardDense() - dense checkerboard (max 2 neighbors)
• spiralNoCenter() - spiral pattern without filled center
• borderThickNoCenter() - thick border but hollow center
• multipleDisjointBlobs() - multiple separate blobs
• lShapesMany() - many L-shaped patterns
• tShapesMany() - many T-shaped patterns (3 neighbors at junction)

Summary Statistics

• Total unique distribution types: 113
• Already implemented: ~8
• Need to implement: ~105

Implementation Notes

Many distributions can share helper functions:

• Random placement within regions
• Component generation (squiggles, blobs, trees)
• Symmetry operations
• Polyomino generation
• Neighbor counting utilities
• Boundary detection

Suggested implementation order:

1. Helper utilities (random placement, neighbor counting)
2. Simple spatial constraints (allInOneHalf, fitsInNxM)
3. Component generators (connected blobs, squiggles, trees)
4. Shape generators (polyominoes, L/T shapes, plus shapes)
5. Pattern generators (checkerboard, spiral, striped)
6. Complex combinations (component + density variations)