Starting position #587
Back-rank setup: QRNKBRNB
SP-587 · ThroneGuard — King home on d or e, knights kept off the a- and h-files — the family of the standard starting array.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on d1, the rooks on b1 and f1, the queen on a1.
The kingside rook already stands on f1, so castling short moves only the king, from d1 to g1.
A bishop starts in the corner on h1: it has a single diagonal, which the g-pawn unlocks, running out to a8.
One second-rank pawn starts with no defender at all: h2.
The setup belongs to the ThroneGuard family; read right to left it becomes position 273.
The engine's main line opens with b4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 11 Morozov Balance Index: 11 of 100 — class D — largest edge.
- Engine evaluation of the starting position: +42 centipawns for White (depth 43, 400 000 000 nodes).
- Rank 855 of 960 by balance — 1 is the most balanced start.
- Balance band L — large edge · dynamics along the play-out: equalizing
- Evaluation along the engine's main line (60 half-moves): +18 → +38 → +8 → 0
Position facts
- Mirror twin: position #273
- The king starts on d, the rooks on b and f
- It becomes the daily position in 1103 days
Puzzles from this position
- Attack on the uncastled king: pawn to g6 (f5·4) — Chess960 specifics · 780
- Attack on the uncastled king: queen to d6 (d4) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to d3 (c2·6) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to f6 (g5·11) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to b5 (a4·25) — Chess960 specifics · 780
- Winning blow: rook to g7 (f7·3) — Chess960 specifics · 1010
- Winning blow: queen to a8 (a3·5) — Chess960 specifics · 1200
- Winning blow: queen to e7 (g5·4) — Chess960 specifics · 1280
- Winning blow: rook to e2 (e1·13) — Chess960 specifics · 1470
- Winning blow: rook to e7 (f7·10) — Chess960 specifics · 2100
This position appears in course day 19
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Commentary
The rook already occupies f1, so short castling moves the king alone from d1. A bishop holds the corner on h1 with one diagonal to a8; the second bishop is on e1. Among the pawns, h2 has no defender, and c2 leans on the king alone. The queen begins in the far corner on a1, the knights on c1 and g1, the second rook on b1. White's edge here is a wide one, +42 centipawns: b4 d6 a4 Bc6 Nf3 Nf6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.