Starting position #900
Back-rank setup: RBBKQRNN
SP-900 · ThroneScout — King on a central file (d/e) with a knight starting on the rim (a/h).
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 a1 and f1, the queen on e1.
The kingside rook already stands on f1, so castling short moves only the king, from d1 to g1.
The bishops stand on b1 and c1; their long diagonals reach h7 and h6 once the c- and d-pawns step aside.
The second rank carries 2 pawns with no defender at all: g2, h2.
The setup belongs to the ThroneScout family; read right to left it becomes position 62.
The engine's main line opens with c4.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 80 Morozov Balance Index: 80 of 100 — class A — most balanced.
- Engine evaluation of the starting position: +17 centipawns for White (depth 42, 400 000 000 nodes).
- Rank 181 of 960 by balance — 1 is the most balanced start.
- Balance band S — slight edge · dynamics along the play-out: stable
- Evaluation along the engine's main line (60 half-moves): +41 → +14 → 0
Position facts
- Mirror twin: position #62
- The king starts on d, the rooks on a and f
- It becomes the daily position in 327 days
Puzzles from this position
- Attack on the uncastled king: bishop to f4 (c1·4) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to f5 (e4·28) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to d6 (e5·12) — Chess960 specifics · 780
- Attack on the uncastled king: queen to b6 (c5·3) — Chess960 specifics · 920
- Attack on the uncastled king: pawn to e6 (f5·22) — Chess960 specifics · 920
- Winning blow: bishop to c4 (d3·3) — Chess960 specifics · 1110
- Attack on the uncastled king: knight to d4 (f3·13) — Chess960 specifics · 1200
- Winning blow: queen to c8 (b7) — Chess960 specifics · 1280
- Mate in 2: rook to f8 (f5) — Chess960 specifics · 1630
- Winning blow: queen to g3 (e1·7) — Chess960 specifics · 2400
This position appears in course day 91
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Commentary
The rook already occupies f1, so short castling moves the king alone from d1; the queen starts on e1, just beside him. The bishops stand side by side on b1 and c1, one on each colour. Two pawns begin without a defender, g2 and h2. The knights are on g1 and h1 — the cornered one has g3 as its only move, and the second rook is on a1. White's edge is a narrow +17 centipawns: c4 c5 Ng3 Ng6 d3 f5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.