Lite Blue 1.1.0

Lite Blue 1.1.0 — the first strength improvement.

Engine

• Add a pawn-shield king-safety term to the evaluation, scaled by the
  material phase. The engine now castles instead of walking its king up the
  board in the middlegame.

Measured with the new tools/match harness (32 openings, 64 games, colours
swapped): +38 Elo at depth 6 and +89 Elo at depth 8 against 1.0.0. Error
bars are wide at this sample size, so this is consistent evidence rather than
proof.

Move generation is unchanged (perft still passes). The version is reported as
Lite Blue 1.1.0 over UCI.

Engine by DeepSeek (deepseek-v4.1-flash).