Starting position #187
Back-rank setup: NRNKBRQB
SP-187 · 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 d1, the rooks on b1 and f1, the queen on g1.
The kingside rook already stands on f1, so castling short moves only the king, from d1 to g1.
A bishop starts in the corner on h1: it has a single diagonal, which the g-pawn unlocks, running out to a8.
Every pawn on the second rank is defended from the very first move.
The setup belongs to the ThroneScout family; read right to left it becomes position 769.
The engine's main line opens with g4.
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 46, 400 000 000 nodes).
- Rank 521 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 (60 half-moves): +29 → +41 → +23 → 0
Position facts
- Mirror twin: position #769
- The king starts on d, the rooks on b and f
- It becomes the daily position in 902 days
Puzzles from this position
- Attack on the uncastled king: pawn to c3 (b2·2) — Chess960 specifics · 780
- Attack on the uncastled king: pawn to e5 (f4·67) — Chess960 specifics · 780
- Winning blow: queen to c4 (g4) — Chess960 specifics · 920
- Winning blow: queen to c2 (g2) — Chess960 specifics · 970
- Winning blow: queen to b3 (h3) — Chess960 specifics · 1200
- Winning blow: queen to f8 (b4) — Chess960 specifics · 1200
- Mate in 2: queen to e8 (e3·2) — Chess960 specifics · 1220
- Winning blow: rook to b7 (b1·11) — Chess960 specifics · 1430
- Mate in 3: rook to f6 (f8) — Chess960 specifics · 1630
- Mate in 3: rook to f8 (g8) — Chess960 specifics · 1990
This position appears in course day 23
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Commentary
The rook already occupies f1, so short castling moves the king alone from d1. A knight begins in the corner on a1 with b3 as its only move; a bishop holds the corner on h1 with one diagonal to a8. Every pawn on the second rank starts with a defender. The queen is on g1, the second bishop on e1, the rooks on b1 and f1. The published line opens g4 g5, then Nab3 Nab6 Nd3 f5.
Written from the measured facts above and checked against the board before publishing. All 960 positions have one.