Starting position #375
Back-rank setup: NRBKRNQB
SP-375 · ThroneScout — Centre-file king, rim knight: 204 of the 960 positions share this pattern.
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 e1, the queen on g1.
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.
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 ThroneScout family; read right to left it becomes position 290.
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 20 Morozov Balance Index: 20 of 100 — class D — largest edge.
- Engine evaluation of the starting position: +37 centipawns for White (depth 45, 400 000 000 nodes).
- Rank 772 of 960 by balance — 1 is the most balanced start.
- Balance band M — moderate edge · dynamics along the play-out: equalizing
- Evaluation along the engine's main line (60 half-moves): +51 → +38 → +24 → 0
Position facts
- Mirror twin: position #290
- The king starts on d, the rooks on b and e
- King and rook are neighbours — castling from adjacent squares feels unusual
- It becomes the daily position in 434 days
Puzzles from this position
- Attack on the uncastled king: queen to b8 (a7·7) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to f5 (g4·20) — Chess960 specifics · 920
- Winning blow: pawn to a8 (a7·3) — Chess960 specifics · 970
- Winning blow: bishop to c6 (h1·2) — Chess960 specifics · 1010
- Winning blow: queen to c3 (g3·2) — Chess960 specifics · 1200
- Winning blow: pawn to a5 (a4·2) — Chess960 specifics · 1250
- Mate in 2: queen to c7 (d7·2) — Chess960 specifics · 1320
- Winning blow: queen to c6 (c1·3) — Chess960 specifics · 1510
- Winning blow: knight to d7 (e5·19) — Chess960 specifics · 1700
- Chess960 tactic on f4 (c7) — Chess960 specifics · 2350
This position appears in course day 135
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Commentary
The king begins on d1 and castling is ordinary in both directions, with the rooks on b1 and e1. A bishop holds the corner on h1 with one diagonal to a8; the second bishop is on c1. A knight is in the corner on a1 with a single move, b3; the second knight is on f1. Among the pawns, a2 begins without a defender. The queen is on g1, and the line runs f4 Nb6 d3 f5 a4 d6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.