Starting position #586
Back-rank setup: QRNKBBRN
SP-586 · ThroneScout — A knight starts on the edge (a/h) and the king sits centrally on d or e; the mirror twin stays in this family too.
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 g1, the queen on a1.
Castling ends where it always does: king to g1 and rook to f1 on the short side, king to c1 and rook to d1 on the long one.
The bishops stand on e1 and f1; their long diagonals reach a5 and a6 once the d- and e-pawns step aside.
One second-rank pawn starts with no defender at all: h2.
The setup belongs to the ThroneScout family; read right to left it becomes position 277.
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 40 Morozov Balance Index: 40 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +29 centipawns for White (depth 40, 400 000 000 nodes).
- Rank 570 of 960 by balance — 1 is the most balanced start.
- Balance band M — moderate edge · dynamics along the play-out: stable
- Evaluation along the engine's main line (60 half-moves): +37 → +1 → 0
Position facts
- Mirror twin: position #277
- The king starts on d, the rooks on b and g
- It becomes the daily position in 800 days
Puzzles from this position
- Attack on the uncastled king: queen to e6 (f6) — Chess960 specifics · 920
- Attack on the uncastled king: bishop to f2 (e1·3) — Chess960 specifics · 970
- Winning blow: queen to f7 (f3·2) — Chess960 specifics · 1010
- Winning blow: bishop to c4 (b5·2) — Chess960 specifics · 1200
- Winning blow: king to e3 (e2·3) — Chess960 specifics · 1280
- Winning blow: rook to b5 (a5·3) — Chess960 specifics · 1610
- Mate in 3: queen to e6 (c8) — Chess960 specifics · 1760
- Attack on the uncastled king: queen to c7 (a5·6) — Chess960 specifics · 1860
- Mate in 3: bishop to b5 (f1·3) — Chess960 specifics · 1980
- Winning blow: rook to b7 (b1·14) — Chess960 specifics · 2060
This position appears in course day 276
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Commentary
The king begins on d1 and castling is ordinary in both directions, with the rooks on b1 and g1. The bishops sit together on e1 and f1, the knights on c1 and h1 — the cornered one has g3 as its only move. Among the pawns, h2 has no defender, and c2 leans on the king alone. The queen begins in the far corner on a1. The main line of the run opens b4 Ng6, then g3 e5 f4 f6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.