Starting position #227
Back-rank setup: BNRQKNRB
SP-227 · ThroneGuard — King home on d or e, knights kept off the a- and h-files — the family of the standard starting array.
Move the pieces right on the board — full Chess960 rules, castle by dropping the king on the rook.
Position features
The king starts on e1, the rooks on c1 and g1, the queen on d1.
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 a1: it has a single diagonal, which the b-pawn unlocks, running out to h8.
One second-rank pawn starts with no defender at all: a2.
The setup belongs to the ThroneGuard family; read right to left it becomes position 627.
The engine's main line opens with g3.
Every sentence here is computed from the setup itself and can be checked on the board.
Balance
MBI 47 Morozov Balance Index: 47 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +27 centipawns for White (depth 47, 400 000 000 nodes).
- Rank 519 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): +22 → +19 → 0
Position facts
- Mirror twin: position #627
- The king starts on e, the rooks on c and g
- It becomes the daily position in 285 days
Puzzles from this position
- Attack on the uncastled king: rook to a1 — Chess960 specifics · 780
- Winning blow: bishop to a5 — Chess960 specifics · 780
- Winning blow: rook to a1 (d1) — Chess960 specifics · 780
- Attack on the uncastled king: rook to c6 (c1·2) — Chess960 specifics · 780
- Winning blow: rook to e7 (c7) — Chess960 specifics · 920
- Attack on the uncastled king: queen to b5 (a4·4) — Chess960 specifics · 1010
- Winning blow: queen to c1 (d1·3) — Chess960 specifics · 1200
- Attack on the uncastled king: pawn to f6 (f5) — Chess960 specifics · 1610
- Mate in 2: rook to f7 (f2·2) — Chess960 specifics · 1670
- Mate in 3: pawn to d6 (d5·4) — Chess960 specifics · 2170
This position appears in course day 25
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Commentary
Both corners hold a bishop, a1 towards h8 and h1 towards a8, each with a single diagonal. Castling is ordinary in both directions from e1, with the queen on d1. On the second rank, a2 starts with no defender at all and f2 has only the king. The knights are on b1 and f1, the rooks on c1 and g1. The engine's line opens g3 g6, then Nc3 c5 e4 Ne6.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.