Starting position #390
Back-rank setup: QRBNNBKR
SP-390 · RampartGuard — King on the wing (b/g) with both knights on inner files.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on g1, the rooks on b1 and h1, the queen on a1.
The king already stands on its castled square, so castling short moves only the rook, from h1 to f1.
The bishops stand on c1 and f1; their long diagonals reach h6 and a6 once the d- and e-pawns step aside.
Every pawn on the second rank is defended from the very first move.
The setup belongs to the RampartGuard family; read right to left it becomes position 758.
The engine's main line opens with h4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 34 Morozov Balance Index: 34 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +31 centipawns for White (depth 45, 400 000 000 nodes).
- Rank 640 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 (55 half-moves): +32 → +21 → 0
Position facts
- Mirror twin: position #758
- The king starts on g, the rooks on b and h
- King and rook are neighbours — castling from adjacent squares feels unusual
- It becomes the daily position in 347 days
Puzzles from this position
- Attack on the uncastled king: pawn to a4 (b3·2) — Chess960 specifics · 780
- Winning blow: knight to g5 (f3·2) — Chess960 specifics · 920
- Winning blow: pawn to d3 (d2·3) — Chess960 specifics · 970
- Winning blow: queen to g7 (d4) — Chess960 specifics · 1010
- Attack on the uncastled king: rook to a3 (b3·2) — Chess960 specifics · 1110
- Winning blow: knight to e5 (f7·4) — Chess960 specifics · 1200
- Winning blow: pawn to c5 (b4·13) — Chess960 specifics · 1280
- Winning blow: rook to e1 (b1) — Chess960 specifics · 1390
- Winning blow: rook to f6 (f1·13) — Chess960 specifics · 1650
- Winning blow: knight to e6 (d4·26) — Chess960 specifics · 2060
This position appears in course day 68
In your browser or in the Android app. Nothing to install · Free, no ads
Commentary
The king begins on g1, already on the square short castling would give him, so that castling moves the rook alone. Every pawn on the second rank begins with a defender — this setup concedes nothing on move one. The queen starts in the far corner on a1, the bishops on c1 and f1. The knights are on d1 and e1, the rooks on b1 and h1. The engine opens on the flank: h4 c5 b4 b6 Nf3 h5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.