- Forsyth-Edwards-Notation full integration (import + export)
Note
Malformed FEN strings will crash the program. (Fixed in c489405)
A fen string should follow the format:
[Position] [Turn] (Castling Availability) (En-passant square) {Half-Move Clock} {Full-Move Clock}
- Customizable sides (Player types: Computer, Random Moves, Player)
- Stockfish 16 integration including full UCI parser and evaluation module
Evaluation module
- The upper of the 2 evaluation bars is the win-chance, where 0 is at the far left and 1 is at the far right. An evaluation of 0.5 is equal.
- The lower is the NNUE evaluation, where the centre is 0 (equal)
| Evaluation Type | Description | Example |
|---|---|---|
| Evaluation | Normal game evaluation | +0.47 |
| Depth to mate (DTM) | The game can only be won by checkmate. | M3 |
| Depth to conversion (DTC) | The game can be won by checkmate, capturing material or promoting a pawn. For example, in KQKR, conversion occurs when White captures the Black rook. | DTC=5 |
| Depth to zeroing (DTZ) | The game can be won by checkmate, capturing material or moving a pawn. For example, in KRPKR, zeroing occurs when White moves his pawn closer to the eighth rank. | DTZ=12 |
- Functional GUI interface
- Dynamic menu bar with configurable options
- Implements checkmate, stalemate, draw by 50-move-rule, draw by three-fold repetition, and draw by insufficient material
Insufficient Material Rules
| Player 1 | Player 2 |
|---|---|
| King | King |
| King | King + Knight |
| King | King + Bishop |
| King + Light-Squared bishop | King + Dark-Squared bishop |
- Graphical evaluation window with NNUE + Classical evaluation, and win percentage calculations
Equation and example graph
The non-linear equation allows the engine to determine a good move based on the current positional evaluation. For example, a good move in a bad position will not be brilliant, despite it increasing their winning chances, as they are still losing.
The function
- Will rewrite ambiguous moves in proper algebraic notation
- Castle and En-passant features
- Asynchronous Evaluation Graphing
- Implements 7-piece Syzygy table bases (14 terabyte database)
Testing and results
| Position | Outcome | Info |
|---|---|---|
| 8/5P2/8/8/p5r1/1p6/3R4/k1K5 w - - 0 1 | 1-0 | White zeroes in 1, White mates in 34 |
| 4k3/8/8/8/8/8/8/4KBN1 w - - 0 1 | 1-0 | White mates in 54 |
| 8/8/7B/K7/8/7p/4Bkp1/6Rb w - - 0 1 | 1/2-1/2 | Insufficient Material |
| 5q2/n2P1k2/2b5/8/8/3N4/4BK2/6Q1 w - - 0 1 | 1-0 | Black zeroes in 6, White zeroes in 4, White mates in 19 |
| 8/1p6/1P1p4/1K1p2B1/P2P4/6pp/1P6/5k2 w - - 0 1 | 1/2-1/2 | Stalemate |
| 8/8/5k2/8/p7/8/1PK5/8 w - - 0 1 | 1-0 | White mates in 48 |
| 4k2r/8/8/7P/7P/6KP/7P/7R w k - 0 1 | 1/2-1/2 | Insufficient Material |
| 7k/r6P/6K1/7R/8/8/P7/8 w - - 0 1 | 1/2-1/2 | Stalemate |
| r2qk3/8/8/8/8/8/8/3QK2R w Kq - 0 1 | 1-0 | White mates in 32 |
| 8/pQp2p1k/7p/6pK/6P1/6P1/8/5q2 b - - 0 1 | 0-1 | Black mates in 1 |
| 1q6/p1p2Q2/8/3p4/4p3/3qk3/8/B5K1 w - - 0 1 | 1-0 | White mates in 1 |
| 6k1/P3Q3/6K1/8/8/8/5pq1/7q w - - 0 1 | 0-1 | Black zeroes in 2, White mates in 2 |
| 1k6/8/pp6/6B1/3P4/2P5/r3r2P/1KR4R b - - 0 1 | 0-1 | Black mates in 1 |
| 8/8/1rk5/KR6/8/8/1P6/8 w - - 0 1 | 1-0 | White mates in 23 |
| 8/8/8/8/2N5/6p1/k1K3N1/8 w - - 0 1 | 1-0 | White mates in 33 |
| 8/8/8/2kpp3/8/8/1K1NN3/8 w - - 0 1 | 1-0 | White zeroes in 122, White mates in 156 |
| 6k1/8/1r2n3/2b5/K7/8/8/1N5Q w - - 0 1 | 1/2-1/2 | White zeroes in 717 |
| 8/3r4/8/6n1/3K1k2/1b6/7N/7Q w - - 0 1 | 1/2-1/2 | White zeroes in 1033 |
| 8/8/8/8/6k1/6P1/r4PK1/1R6 w - - 0 1 | 1-0 | White zeroes in 9, Black zeroes in 16, White mates in 12 |
| 5qk1/6p1/6P1/8/PP6/KP6/8/QRRRRRRR b - - 0 1 | 1/2-1/2 | Stalemate |
| 1N6/1RK5/5n2/8/8/8/5n2/6k1 w - - 0 1 | 1/2-1/2 | Black zeroes in 483, White zeroes in 479 |
| 8/4N3/8/8/3pN3/1p6/p2R4/k5K1 w - - 0 1 | 1-0 | Black zeroes in 6, White mates in 30 |
Note
Arguments with spaces should be encased in quotes:
'-FEN=rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1'
| Argument | Default values | Data Type |
|---|---|---|
-Board.Size=VALUE |
600 | Integer |
-FEN=VALUE |
rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 | String |
-PlayAs=VALUE |
true | Boolean |
-Game.Opponent=VALUE |
COMPUTER | COMPUTER, PLAYER, RANDOM |
-Game.Self=VALUE |
PLAYER | COMPUTER, PLAYER, RANDOM |
-Engine.Time=VALUE |
3000 | Integer |
-Engine.PV=VALUE |
1 | Integer |
-Engine.Cores=VALUE |
Based on your CPU |
Integer |
| --nogui | Disables console GUI |
|
| --noerr | Disables error GUI |
|
| --generate-bat | Opens the executable generator |
Tip
The default cores will be set to your physical processor count.
For optimal performance, consider using the following:
-Engine.Cores={LOGICAL_PROCESSOR_COUNT}
For more info, see hyper threading
To start the batch file generator, only use the --generate-bat JVM argument:
Microsoft Windows [Version xx.x.xxxxx.xxxx]
(c) Microsoft Corporation. All rights reserved.
C:\Users\vlink102>java -jar ChessV3-vx.x.x.jar --generate-batWarning
The batch file will run the same parameters every time.
This also means that if the JDK path or .jar file are either deleted or moved, the batch script will no longer function.
To generate another, simply re-run the generator.
Note
The generator will not allow the user to set the Engine.Cores parameter higher than the logical cores of the computer.
Several other restrictions are also in place to prevent accidental inputs.
& "{PATH_TO_JRE}\java.exe" -jar "{PATH_TO_JAR}\ChessV3-{VERSION}.jar" --generate-bat