Starting position
docs/fixtures/opening-position.md. This page is copied from the repository at build time; edit the repository file, not this page.
QuaterniTS starts with 64 pieces on a 12 × 12 board: 16 pieces per army,
including two advanced central pawns per player. White moves first; turns
continue clockwise through Red, Black and Green. The coordinates below use
files a–l from left to right and ranks 1–12 from bottom to top.
Sources
Section titled “Sources”- Official illustrated quick rules: the pictured board governs the opening.
- Official tutorial, chapter 1: its pictured board and
basicPositiondata give the 64 square, colour and piece-type facts. - Official basic rules: turn order and game overview.
- Patent US20150352433A1: supporting background only; its conflicting corners and incomplete pawn listings do not override the pictured board.
The tutorial’s 64 basicPosition facts agree with the pictured corner
arrangement: White bottom-left (a1), Red top-left (a12), Black top-right
(l12), Green bottom-right (l1).
Pieces by army
Section titled “Pieces by army”White (bottom-left; king a1)
Section titled “White (bottom-left; king a1)”| Type | Squares |
|---|---|
| King | a1 |
| Queen | b2 |
| Rook | a4, d1 |
| Knight | b4, c4 |
| Bishop | d2, d3 |
| Pawn | a5, b5, c5, d4, e5, e1, e2, e3 |
Advanced central pawns: d4, e5.
Red (top-left; king a12)
Section titled “Red (top-left; king a12)”| Type | Squares |
|---|---|
| King | a12 |
| Queen | b11 |
| Rook | a9, d12 |
| Knight | d10, d11 |
| Bishop | b9, c9 |
| Pawn | a8, b8, c8, d9, e8, e10, e11, e12 |
Advanced central pawns: d9, e8.
Black (top-right; king l12)
Section titled “Black (top-right; king l12)”| Type | Squares |
|---|---|
| King | l12 |
| Queen | k11 |
| Rook | i12, l9 |
| Knight | j9, k9 |
| Bishop | i10, i11 |
| Pawn | h8, h10, h11, h12, i9, j8, k8, l8 |
Advanced central pawns: i9, h8.
Green (bottom-right; king l1)
Section titled “Green (bottom-right; king l1)”| Type | Squares |
|---|---|
| King | l1 |
| Queen | k2 |
| Rook | i1, l4 |
| Knight | i2, i3 |
| Bishop | j4, k4 |
| Pawn | h1, h2, h3, h5, i4, j5, k5, l5 |
Advanced central pawns: i4, h5.
Position checks
Section titled “Position checks”Each army has one king, one queen, two rooks, two knights, two bishops and eight pawns. Across four armies that is 64 occupied squares; the opening fixture and its tests assert every square, colour and piece type.
Source/exception table
Section titled “Source/exception table”The picture and tutorial data currently agree on all 64 squares. No exception is needed:
| Square | Discrepancy | Resolution | Source |
|---|---|---|---|
| none | — | — | — |
If a future discrepancy appears, the official illustrated board takes precedence. Advanced central pawn direction is chosen during play, not fixed by the opening position; see Pawns.