Starting position #907
Back-rank setup: RKQRBNNB
SP-907 · RampartGuard — The king starts out on a wing file, b or g, with neither knight in a corner.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on b1, the rooks on a1 and d1, the queen on c1.
From b1 the king makes the longest journey Chess960 allows when castling short: five squares to g1.
A bishop starts in the corner on h1: it has a single diagonal, which the g-pawn unlocks, running out to a8.
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 49.
The engine's main line opens with a4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 31 Morozov Balance Index: 31 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +32 centipawns for White (depth 44, 400 000 000 nodes).
- Rank 656 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 (41 half-moves): +35 → +26 → 0
Position facts
- Mirror twin: position #49
- The king starts on b, the rooks on a and d
- King and rook are neighbours — castling from adjacent squares feels unusual
- It becomes the daily position in 878 days
Puzzles from this position
- Attack on the uncastled king: knight to b7 (c5·12) — Chess960 specifics · 780
- Attack on the uncastled king: rook to f8 (f3) — Chess960 specifics · 780
- Winning blow: rook to h1 (d1·2) — Chess960 specifics · 920
- Attack on the uncastled king: rook to d1 (a1) — Chess960 specifics · 1060
- Winning blow: rook to d8 (d1·12) — Chess960 specifics · 1200
- Winning blow: pawn to e7 (d6·9) — Chess960 specifics · 1200
- Winning blow: rook to d8 (d1·22) — Chess960 specifics · 1280
- Winning blow: queen to d1 (c1·4) — Chess960 specifics · 1470
- Mate in 3: pawn to b6 (a5) — Chess960 specifics · 1630
- Mate in 3: queen to c7 (c2) — Chess960 specifics · 1860
This position appears in course day 53
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Commentary
The king begins on b1, and short castling takes him five squares across the board to g1. A rook occupies d1, the square a classical setup keeps for the queen, and the second rook stands in the corner on a1. A bishop holds the corner on h1 with one diagonal to a8; the second bishop is on e1. Every pawn on the second rank begins with a defender — this setup concedes nothing on move one. The queen stands on c1, right beside the king, and the knights are on f1 and g1. White's edge is +32 centipawns, and the line answers in mirror: a4 a5 d4 d5 Ne3 Ne6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.