Since you’re here...

We hope you will consider supporting us today. We need your support to continue to exist, because good entries are more and more work time. Every reader contribution, however big or small, is so valuable. Support "Chess Engines Diary" even a small amount– and it only takes a minute. Thank you.
============================== My email: jotes@go2.pl



VietCoffee 1.0.8 JA - new version chess engine

on

VietCoffee a chess engine written in Go, tuned to play aggressively. Zero dependencies, stdlib only. VietCoffee speaks the UCI protocol for use with chess GUIs, and includes a built-in Lichess Bot API client for playing live games on lichess.org. Github: https://github.com/williamvietnguyen/vietnamesecoffee/releases
Author: William Nguyen

Maximum Aggression Tuning

Every king-attack-related eval parameter has been cranked up. The engine will sacrifice material far more aggressively to get at the king.

Changes

  • Tropism weights — knights/queens 3→5, bishops/rooks 2→4 per step closer to enemy king
  • Outer zone bonuses — knights +5→+10, bishops/rooks +8→+15, queens +12→+20
  • King attack weight table — ~1.5x across the board (e.g. 3 attackers: 240→360, 4 attackers: 540→750)
  • Imbalance divisor — 200→120 (much steeper quadratic scaling when one side has a king attack edge)
  • X-ray bonuses — bishop 25→40, queen diagonal 30→45, queen rank/file 20→30
  • Uncastled king penalty — 30→50 mg
  • Pawn shield penalty — 10→15 per missing shield pawn
  • Pawn storm — 20→30 per rank, opposite-side castling multiplier 1.5x→2x
  • Rook near king — open file +25→+35, semi-open +15→+25, doubled +25→+35
  • Own pawn discount — 90→80 (even cheaper to sacrifice pawns for open lines)

Jim Ablett compiles:

Comments

Post a Comment