uci

A golang API to interact with UCI chess engines. (should be considered experimental for the time being) A description of how UCI works is available here.

Many chess engines support UCI (Universal Chess Interface). This library is designed for use with Stockfish, but should work with other UCI engines.

Godoc for UCI

minimum viable snippet

package main
import (
"fmt""log""gopkg.in/freeeve/uci.v1"
)
funcmain() {
eng, err:=uci.NewEngine("/path/to/stockfish")
iferr!=nil {
log.Fatal(err)
}
// set some engine optionseng.SetOptions(uci.Options{
Hash:128,
Ponder:false,
OwnBook:true,
MultiPV:4,
})
// set the starting positioneng.SetFEN("rnb4r/ppp1k1pp/3bp3/1N3p2/1P2n3/P3BN2/2P1PPPP/R3KB1R b KQ - 4 11")
// set some result filter optionsresultOpts:=uci.HighestDepthOnly|uci.IncludeUpperbounds|uci.IncludeLowerboundsresults:=eng.GoDepth(10, resultOpts)
// print it (String() goes to pretty JSON for now)fmt.Println(results)
}

produces this output:

{
"BestMove": "c8d7",
"Results": [
{
"Time": 136,
"Depth": 10,
"SelDepth": 16,
"Nodes": 183853,
"NodesPerSecond": 1351860,
"MultiPV": 1,
"Lowerbound": false,
"Upperbound": false,
"Score": 20,
"Mate": false,
"BestMoves": [
"c8d7",
"b5d6",
"c7d6",
"f3g5",
"b8c6",
"g5e4",
"f5e4",
"a1d1",
"h7h6",
"f2f4",
"a8f8"
]
},
{
"Time": 136,
"Depth": 10,
"SelDepth": 16,
"Nodes": 183853,
"NodesPerSecond": 1351860,
"MultiPV": 2,
"Lowerbound": false,
"Upperbound": false,
"Score": 2,
"Mate": false,
"BestMoves": [
"a7a5",
"b5d6",
"c7d6",
"b4b5",
"b8d7",
"f3d2",
"e4d2",
"e3d2",
"b7b6",
"a3a4"
]
},
{
"Time": 136,
"Depth": 10,
"SelDepth": 16,
"Nodes": 183853,
"NodesPerSecond": 1351860,
"MultiPV": 3,
"Lowerbound": false,
"Upperbound": false,
"Score": -4,
"Mate": false,
"BestMoves": [
"b8c6",
"c2c4",
"a7a6",
"b5d6",
"c7d6",
"f3g5",
"c8d7",
"c4c5",
"d6d5",
"g5e4",
"f5e4"
]
},
{
"Time": 136,
"Depth": 10,
"SelDepth": 16,
"Nodes": 183853,
"NodesPerSecond": 1351860,
"MultiPV": 4,
"Lowerbound": false,
"Upperbound": false,
"Score": -18,
"Mate": false,
"BestMoves": [
"e7f7",
"h2h4",
"a7a5",
"b5d6",
"c7d6",
"b4a5",
"b8d7",
"f3g5",
"e4g5",
"h4g5",
"a8a5",
"e3d2"
]
}
]
}