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lithanderlithander
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Standard hashsize reduced to 50 MB, size can now be set via UCI option. Changed the target Framework to .Net5. Bumped version to 0.5 for the next public release.
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10 files changed

+51
-42
lines changed

10 files changed

+51
-42
lines changed

‎MinimalChess/MinimalChess.csproj‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,7 +1,7 @@
11
<Project Sdk="Microsoft.NET.Sdk">
22

33
<PropertyGroup>
4-
<TargetFramework>netcoreapp3.1</TargetFramework>
4+
<TargetFramework>net5.0</TargetFramework>
55
</PropertyGroup>
66

77
</Project>

‎MinimalChess/Transpositions.cs‎

Lines changed: 27 additions & 17 deletions
Original file line numberDiff line numberDiff line change
@@ -25,23 +25,38 @@ public struct HashEntry
2525
}
2626

2727
public static short PERSISTENT = 9999;
28-
28+
public const int DEFAULT_SIZE_MB = 50;
2929
const int ENTRY_SIZE = 16; //BYTES
30-
const int HASH_MEMORY = 256; //Megabytes
31-
const int TT_SIZE = (HASH_MEMORY * 1024 * 1024) / ENTRY_SIZE;
30+
static HashEntry[] _table;
31+
32+
static int Index(in ulong hash) => (int)(hash % (ulong)_table.Length);
33+
34+
static Transpositions()
35+
{
36+
Resize(DEFAULT_SIZE_MB);
37+
}
3238

33-
static HashEntry[] _table = new HashEntry[TT_SIZE];
39+
public static void Resize(int hashSizeMBytes)
40+
{
41+
int length = (hashSizeMBytes * 1024 * 1024) / ENTRY_SIZE;
42+
_table = new HashEntry[length];
43+
}
44+
45+
public static void Clear()
46+
{
47+
Array.Clear(_table, 0, _table.Length);
48+
}
3449

3550
public static void Store(ulong zobristHash, int depth, SearchWindow window, int score, Move bestMove)
3651
{
37-
int slot = (int)(zobristHash % TT_SIZE);
38-
ref HashEntry entry = ref _table[slot];
52+
int index = Index(zobristHash);
53+
ref HashEntry entry = ref _table[index];
3954
if (entry.Depth == PERSISTENT)
4055
return;
4156

4257
//don't overwrite a bestmove unless it's a new position OR the new bestMove is explored to a greater depth
4358
if (entry.Hash != zobristHash || (depth >= entry.Depth && bestMove != default))
44-
_table[slot].BestMove = bestMove;
59+
_table[index].BestMove = bestMove;
4560

4661
entry.Hash = zobristHash;
4762
entry.Depth = (short)Math.Max(0, depth);
@@ -66,18 +81,18 @@ public static void Store(ulong zobristHash, int depth, SearchWindow window, int
6681
internal static Move GetBestMove(Board position)
6782
{
6883
ulong zobristHash = position.ZobristHash;
69-
int slot = (int)(zobristHash % TT_SIZE);
70-
if (_table[slot].Hash == zobristHash)
71-
return _table[slot].BestMove;
84+
int index = Index(zobristHash);
85+
if (_table[index].Hash == zobristHash)
86+
return _table[index].BestMove;
7287
else
7388
return default;
7489
}
7590

7691
public static bool GetScore(Board position, int depth, SearchWindow window, out int score)
7792
{
7893
ulong zobristHash = position.ZobristHash;
79-
int slot = (int)(zobristHash % TT_SIZE);
80-
ref HashEntry entry = ref _table[slot];
94+
int index = Index(zobristHash);
95+
ref HashEntry entry = ref _table[index];
8196

8297
score = entry.Score;
8398
if (entry.Hash != zobristHash || entry.Depth < depth)
@@ -95,10 +110,5 @@ public static bool GetScore(Board position, int depth, SearchWindow window, out
95110

96111
return false;
97112
}
98-
99-
public static void Clear()
100-
{
101-
Array.Clear(_table, 0, TT_SIZE);
102-
}
103113
}
104114
}

‎MinimalChessBoard/MinimalChessBoard.csproj‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -2,11 +2,11 @@
22

33
<PropertyGroup>
44
<OutputType>Exe</OutputType>
5-
<TargetFramework>netcoreapp3.1</TargetFramework>
5+
<TargetFramework>net5.0</TargetFramework>
66
</PropertyGroup>
77

88
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
9-
<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
9+
<AllowUnsafeBlocks>false</AllowUnsafeBlocks>
1010
</PropertyGroup>
1111

1212
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

‎MinimalChessBoard/Program.cs‎

Lines changed: 6 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -14,11 +14,6 @@ static void Main()
1414
{
1515
CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
1616

17-
unsafe{
18-
Console.WriteLine($"Move: {sizeof(Move)} bytes");
19-
Console.WriteLine($"Transpositions.HashEntry: {sizeof(Transpositions.HashEntry)} bytes");
20-
}
21-
2217
bool running = true;
2318
Board board = new Board(Board.STARTING_POS_FEN);
2419
Move move = default;
@@ -46,7 +41,7 @@ static void Main()
4641
string command = tokens[0];
4742

4843
long t0 = Stopwatch.GetTimestamp();
49-
//try
44+
try
5045
{
5146
if (command == "reset")
5247
{
@@ -94,7 +89,7 @@ static void Main()
9489
int depth = tokens.Length > 1 ? int.Parse(tokens[1]) : 0;
9590
ListMoves(board, depth);
9691
}
97-
else if(command == "m")
92+
else if (command == "m")
9893
{
9994
PrintMobility(board);
10095
}
@@ -108,10 +103,10 @@ static void Main()
108103
if (dt > 0.01)
109104
Console.WriteLine($" Operation took {dt:0.####}s");
110105
}
111-
//catch (Exception error)
112-
//{
113-
// Console.WriteLine("ERROR: " + error.Message);
114-
//}
106+
catch (Exception error)
107+
{
108+
Console.WriteLine("ERROR: " + error.Message);
109+
}
115110
}
116111
}
117112

‎MinimalChessEngine/MinimalChessEngine.csproj‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -2,7 +2,7 @@
22

33
<PropertyGroup>
44
<OutputType>Exe</OutputType>
5-
<TargetFramework>netcoreapp3.1</TargetFramework>
5+
<TargetFramework>net5.0</TargetFramework>
66
</PropertyGroup>
77

88
<ItemGroup>

‎MinimalChessEngine/Program.cs‎

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@ namespace MinimalChessEngine
77
{
88
public static class Program
99
{
10-
const string NAME_VERSION = "MinimalChess 0.4.9";
10+
const string NAME_VERSION = "MinimalChess 0.5";
1111

1212
static Engine _engine = new Engine();
1313
static async Task Main()
@@ -36,6 +36,7 @@ private static void ParseUciCommand(string input)
3636
case "uci":
3737
Console.WriteLine($"id name {NAME_VERSION}");
3838
Console.WriteLine($"id author Thomas Jahn");
39+
Console.WriteLine($"option name Hash type spin default {Transpositions.DEFAULT_SIZE_MB} min 1 max 2047");//consider gcAllowVeryLargeObjects if larger TT is needed
3940
Console.WriteLine("uciok");
4041
break;
4142
case "isready":
@@ -67,7 +68,8 @@ private static void ParseUciCommand(string input)
6768

6869
private static void UciSetOption(string[] tokens)
6970
{
70-
//No options currently supported
71+
if (tokens[1] == "name" && tokens[2] == "Hash" && tokens[3] == "value" && int.TryParse(tokens[4], out int hashSizeMBytes))
72+
Transpositions.Resize(hashSizeMBytes);
7173
}
7274

7375
private static void UciPosition(string[] tokens)

‎MinimalChessEngine/Properties/PublishProfiles/Linux ARM.pubxml‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,8 +7,8 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
77
<PublishProtocol>FileSystem</PublishProtocol>
88
<Configuration>Release</Configuration>
99
<Platform>Any CPU</Platform>
10-
<TargetFramework>netcoreapp3.1</TargetFramework>
11-
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.4.1 Linux ARM</PublishDir>
10+
<TargetFramework>net5.0</TargetFramework>
11+
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.5 Linux ARM</PublishDir>
1212
<RuntimeIdentifier>linux-arm</RuntimeIdentifier>
1313
<SelfContained>true</SelfContained>
1414
<PublishSingleFile>False</PublishSingleFile>

‎MinimalChessEngine/Properties/PublishProfiles/Linux x64.pubxml‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,8 +7,8 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
77
<PublishProtocol>FileSystem</PublishProtocol>
88
<Configuration>Release</Configuration>
99
<Platform>Any CPU</Platform>
10-
<TargetFramework>netcoreapp3.1</TargetFramework>
11-
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.4.9 Linux</PublishDir>
10+
<TargetFramework>net5.0</TargetFramework>
11+
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.5 Linux</PublishDir>
1212
<RuntimeIdentifier>linux-x64</RuntimeIdentifier>
1313
<SelfContained>true</SelfContained>
1414
<PublishSingleFile>True</PublishSingleFile>

‎MinimalChessEngine/Properties/PublishProfiles/Mac x64.pubxml‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,12 +7,13 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
77
<PublishProtocol>FileSystem</PublishProtocol>
88
<Configuration>Release</Configuration>
99
<Platform>Any CPU</Platform>
10-
<TargetFramework>netcoreapp3.1</TargetFramework>
11-
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.4.1 Mac</PublishDir>
10+
<TargetFramework>net5.0</TargetFramework>
11+
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.5 Mac</PublishDir>
1212
<RuntimeIdentifier>osx-x64</RuntimeIdentifier>
1313
<SelfContained>true</SelfContained>
1414
<PublishSingleFile>True</PublishSingleFile>
1515
<PublishReadyToRun>False</PublishReadyToRun>
1616
<PublishTrimmed>True</PublishTrimmed>
17+
<IncludeAllContentForSelfExtract>true</IncludeAllContentForSelfExtract>
1718
</PropertyGroup>
1819
</Project>

‎MinimalChessEngine/Properties/PublishProfiles/Windows x64.pubxml‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -7,12 +7,13 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
77
<PublishProtocol>FileSystem</PublishProtocol>
88
<Configuration>Release</Configuration>
99
<Platform>Any CPU</Platform>
10-
<TargetFramework>netcoreapp3.1</TargetFramework>
11-
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.4.9 Windows</PublishDir>
10+
<TargetFramework>net5.0</TargetFramework>
11+
<PublishDir>D:\Projekte\Chess\Builds\MinimalChess 0.5 Windows</PublishDir>
1212
<RuntimeIdentifier>win-x64</RuntimeIdentifier>
1313
<SelfContained>true</SelfContained>
1414
<PublishSingleFile>True</PublishSingleFile>
1515
<PublishReadyToRun>False</PublishReadyToRun>
1616
<PublishTrimmed>True</PublishTrimmed>
17+
<IncludeAllContentForSelfExtract>true</IncludeAllContentForSelfExtract>
1718
</PropertyGroup>
1819
</Project>

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