Starting position #337
Back-rank setup: BNRBKQRN
SP-337 · ThroneScout — A central king (d or e), but with a knight posted out on the a- or h-file.
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 f1.
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.
The second rank carries 2 pawns with no defender at all: a2, h2.
The setup belongs to the ThroneScout family; read right to left it becomes position 331.
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 47 Morozov Balance Index: 47 of 100 — class C — noticeable edge.
- Engine evaluation of the starting position: +27 centipawns for White (depth 51, 400 000 000 nodes).
- Rank 511 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 (48 half-moves): +33 → +19 → 0
Position facts
- Mirror twin: position #331
- The king starts on e, the rooks on c and g
- It becomes the daily position in 784 days
Puzzles from this position
- Attack on the uncastled king: knight to a3 — Chess960 specifics · 780
- Attack on the uncastled king: rook to f5 (f1·3) — Chess960 specifics · 780
- Winning blow: knight to f6 (d5) — Chess960 specifics · 920
- Winning blow: bishop to h5 (f3) — Chess960 specifics · 920
- Attack on the uncastled king: rook to c1 (d1·4) — Chess960 specifics · 970
- Winning blow: knight to d6 (b5·7) — Chess960 specifics · 1150
- Winning blow: knight to c3 (b1·3) — Chess960 specifics · 1340
- Mate in 3: rook to f5 — Chess960 specifics · 1630
- Mate in 3: bishop to a3 (b2) — Chess960 specifics · 1760
- Chess960 tactic on d6 (d5) — Chess960 specifics · 2120
This position appears in course day 39
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Commentary
Castling is ordinary in both directions from e1, with the queen on f1 next to her king. A knight sits in the corner on h1 with g3 as its only move, the second on b1. A bishop is closed into the corner on a1 with a single diagonal to h8; the second bishop is on d1. The pawns on a2 and h2 both begin with no defender at all. The search ran to depth 51 here: f4 f5 e3 e6 g4 fxg4, and +27 centipawns at the end of it.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.