Starting position #383
Back-rank setup: NRKRNQBB
SP-383 · BastionScout — King shifted to c or f, with a knight committed to the corner from move one.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on c1, the rooks on b1 and d1, the queen on f1.
The king already stands on c1, so castling long moves only the rook, from b1 to d1.
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: a2.
The setup belongs to the BastionScout family; read right to left it becomes position 288.
The engine's main line opens with f4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 26 Morozov Balance Index: 26 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +34 centipawns for White (depth 46, 400 000 000 nodes).
- Rank 709 of 960 by balance — 1 is the most balanced start.
- Balance band M — moderate edge · dynamics along the play-out: volatile
- Evaluation along the engine's main line (60 half-moves): +34 → +44 → +155 → +212
Position facts
- Mirror twin: position #288
- The king starts on c, the rooks on b and d
- King and rook are neighbours — castling from adjacent squares feels unusual
- It becomes the daily position in 383 days
Puzzles from this position
- Attack on the uncastled king: knight to d6 — Chess960 specifics · 620
- Winning blow: queen to c3 (c4) — Chess960 specifics · 920
- Winning blow: queen to b7 (a8·3) — Chess960 specifics · 1200
- Attack on the uncastled king: queen to a6 (f1·7) — Chess960 specifics · 1250
- Winning blow: queen to d8 (f8·3) — Chess960 specifics · 1290
- Winning blow: king to b1 (c1·38) — Chess960 specifics · 1470
- Attack on the uncastled king: queen to h8 (h4·4) — Chess960 specifics · 1630
- Winning blow: bishop to d7 (c6·3) — Chess960 specifics · 1790
- Winning blow: knight to c5 (d3·18) — Chess960 specifics · 1870
- Attack on the uncastled king: bishop to b7 (h1·13) — Chess960 specifics · 2400
This position appears in course day 2
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Commentary
The king already stands on c1, so long castling moves the rook alone from b1. A bishop holds the corner on h1 with one diagonal to a8; the second bishop is on g1. A knight is in the corner on a1 with a single move, b3; the second knight is on e1. Among the pawns, a2 begins without a defender. The queen is on f1, and the line runs f4 f5 b3 Nb6 c4 d5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.