diff --git a/src/main/kotlin/no/rodland/advent_2023/Day18.kt b/src/main/kotlin/no/rodland/advent_2023/Day18.kt
new file mode 100644
index 00000000..7453c7fc
--- /dev/null
+++ b/src/main/kotlin/no/rodland/advent_2023/Day18.kt
@@ -0,0 +1,27 @@
+package no.rodland.advent_2023
+
+import no.rodland.advent.Day
+
+// template generated: 18/12/2023
+// Fredrik Rødland 2023
+
+class Day18(val input: List<String>) : Day<Long, Long, List<String>> {
+
+    private val parsed = input.parse()
+
+    override fun partOne(): Long {
+        return 2
+    }
+
+    override fun partTwo(): Long {
+        return 2
+    }
+
+    override fun List<String>.parse(): List<String> {
+        return map { line ->
+            line
+        }
+    }
+
+    override val day = "18".toInt()
+}
diff --git a/src/test/kotlin/no/rodland/advent_2023/Day18Test.kt b/src/test/kotlin/no/rodland/advent_2023/Day18Test.kt
new file mode 100644
index 00000000..3bacbd02
--- /dev/null
+++ b/src/test/kotlin/no/rodland/advent_2023/Day18Test.kt
@@ -0,0 +1,82 @@
+package no.rodland.advent_2023
+
+import no.rodland.advent.*
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.Test
+import readFile
+
+//
+//  run: download_aoc_input.sh to download input
+//
+
+@Suppress("ClassName")
+@DisableSlow
+internal class Day18Test {
+    private val data18 = "2023/input_18.txt".readFile()
+    private val test18 = "2023/input_18_test.txt".readFile()
+
+    private val resultTestOne = 2L
+    private val resultTestTwo = 2L
+    private val resultOne = 2L
+    private val resultTwo = 2L
+
+    val test = defaultTestSuiteParseOnInit(
+        Day18(data18),
+        Day18(test18),
+        resultTestOne,
+        resultOne,
+        resultTestTwo,
+        resultTwo,
+        { Day18(data18) },
+        { Day18(test18) },
+    )
+
+    @Nested
+    inner class Init {
+        @Test
+        fun `18,-,example,1`() {
+            report(AOCTest({ "123".toInt() }, Unit, 123, 5, "18".toInt(), Part.TWO, false, "example"))
+        }
+
+        @Test
+        fun `18,-,example,2`() {
+            report(test.initTest.copy())
+        }
+
+        @Test
+        fun `18,-,test,init`() {
+            report(test.initTest)
+        }
+
+        @Test
+        fun `18,-,live,init`() {
+            report(test.initLive)
+        }
+    }
+
+    @Nested
+    inner class `Part 1` {
+        @Test
+        fun `18,1,test`() {
+            report(test.testPart1)
+        }
+
+        @Test
+        fun `18,1,live,1`() {
+            report(test.livePart1)
+        }
+    }
+
+    @Nested
+    inner class `Part 2` {
+        @Test
+        fun `18,2,test`() {
+            report(test.testPart2)
+        }
+
+        @Test
+        fun `18,2,live,1`() {
+            report(test.livePart2)
+        }
+    }
+}
diff --git a/src/test/resources/2023/input_18.txt b/src/test/resources/2023/input_18.txt
index e69de29b..2044ef7f 100644
--- a/src/test/resources/2023/input_18.txt
+++ b/src/test/resources/2023/input_18.txt
@@ -0,0 +1,638 @@
+R 6 (#4d17d2)
+U 5 (#af8603)
+L 4 (#1ae700)
+U 10 (#653071)
+R 4 (#14fa90)
+U 7 (#35c823)
+L 6 (#c3ab30)
+U 5 (#35c821)
+R 2 (#2a44c0)
+U 9 (#653073)
+R 5 (#4ec500)
+U 4 (#599563)
+R 7 (#70e612)
+U 6 (#5c15a3)
+R 3 (#021392)
+U 8 (#3548c1)
+L 3 (#e79ac2)
+U 8 (#3548c3)
+L 9 (#120222)
+D 8 (#201843)
+L 5 (#4d17d0)
+U 7 (#38dc03)
+L 3 (#972af2)
+U 5 (#62ca13)
+L 3 (#59ed62)
+U 4 (#0ce593)
+L 6 (#02b670)
+U 7 (#6ce383)
+L 8 (#782cd2)
+U 7 (#775203)
+R 8 (#782cd0)
+U 4 (#26fff3)
+R 3 (#02b672)
+U 7 (#344fa3)
+R 9 (#0bb672)
+U 6 (#c6d893)
+R 5 (#6002a2)
+D 7 (#197413)
+R 6 (#3fec92)
+D 5 (#bd6723)
+R 3 (#1d2472)
+U 12 (#a97743)
+R 3 (#42ee52)
+U 5 (#24b683)
+R 7 (#40e860)
+D 3 (#7d48c3)
+R 2 (#911270)
+D 5 (#7d48c1)
+R 11 (#39bd90)
+D 6 (#01a883)
+L 6 (#8b6400)
+D 9 (#0612a3)
+R 6 (#244b90)
+D 3 (#0612a1)
+R 2 (#9e8620)
+D 4 (#1d6ff3)
+R 3 (#627850)
+D 6 (#884a43)
+R 7 (#2f3bd2)
+D 4 (#8130f1)
+L 3 (#5f7702)
+D 3 (#95a0f3)
+L 7 (#5763b2)
+D 6 (#95a0f1)
+L 4 (#54b952)
+D 8 (#8130f3)
+L 5 (#7057f2)
+D 6 (#c59b73)
+R 3 (#058642)
+D 7 (#cc6363)
+R 5 (#22f310)
+D 7 (#6902b3)
+L 5 (#ce2540)
+D 5 (#0cae43)
+R 5 (#638300)
+U 2 (#a29981)
+R 4 (#06a0f0)
+U 9 (#650061)
+R 3 (#4ffdd0)
+U 8 (#78eab1)
+R 4 (#9b00b0)
+D 5 (#78eab3)
+R 6 (#277320)
+U 2 (#650063)
+R 6 (#2a5070)
+U 5 (#11b471)
+R 7 (#372410)
+U 10 (#4a1141)
+R 6 (#010020)
+U 7 (#63e021)
+R 10 (#702450)
+U 7 (#0823f1)
+R 3 (#310c10)
+D 14 (#0823f3)
+R 4 (#57cab0)
+U 9 (#58cf41)
+R 5 (#6dd760)
+U 6 (#4c3171)
+R 5 (#a16b72)
+D 5 (#5866c1)
+R 7 (#2abf22)
+D 3 (#3f05f1)
+L 4 (#6b85a2)
+D 11 (#73d6a1)
+R 4 (#23aac2)
+D 4 (#7e4ce1)
+R 5 (#9326d2)
+D 10 (#3771c3)
+R 4 (#459d72)
+U 9 (#3771c1)
+R 7 (#5b1752)
+U 6 (#227be1)
+L 10 (#690342)
+U 2 (#a912e1)
+R 10 (#584650)
+U 7 (#6bba31)
+L 9 (#84e0a0)
+U 5 (#5d9fb1)
+R 9 (#6bbd30)
+U 4 (#90c101)
+R 3 (#53fab0)
+U 3 (#47d041)
+R 4 (#8cfc00)
+U 10 (#2c32d1)
+R 7 (#ce5ef0)
+U 5 (#428fc1)
+R 9 (#ad7d40)
+U 4 (#46ee11)
+R 3 (#2aa4e0)
+U 5 (#6e8611)
+L 12 (#926bf0)
+U 3 (#7a96b3)
+R 5 (#40f7b2)
+U 6 (#8bde03)
+L 5 (#c7bf92)
+U 8 (#4dd953)
+R 4 (#544cd2)
+U 3 (#5d83c3)
+L 4 (#501082)
+U 7 (#5233d3)
+R 5 (#aea302)
+U 3 (#95bb53)
+L 10 (#646eb0)
+D 3 (#a708f3)
+L 8 (#43b150)
+D 6 (#3db811)
+L 2 (#6188b0)
+D 11 (#b31b51)
+R 5 (#009f10)
+D 3 (#764a21)
+R 5 (#6847e0)
+D 3 (#a899c3)
+L 2 (#408f80)
+D 9 (#be83c3)
+L 9 (#50e960)
+U 9 (#869503)
+L 7 (#5425b0)
+U 10 (#7a6843)
+L 5 (#038960)
+U 11 (#6b2233)
+L 6 (#e4a4d0)
+U 5 (#660ad3)
+L 4 (#4ac160)
+U 6 (#1312b3)
+L 4 (#7acf10)
+U 5 (#510723)
+L 7 (#087e10)
+U 3 (#85e513)
+L 4 (#834d22)
+U 4 (#031653)
+R 9 (#4ac162)
+U 2 (#d1cd63)
+R 2 (#737d80)
+U 8 (#50aa23)
+R 5 (#389bf0)
+D 4 (#662db1)
+R 6 (#54e9c0)
+U 6 (#290a51)
+R 6 (#7ebc70)
+U 6 (#2abbe1)
+L 6 (#48a390)
+U 5 (#2abbe3)
+R 5 (#4db730)
+U 3 (#9f5031)
+R 5 (#20b330)
+D 9 (#db37b3)
+R 6 (#6ff200)
+D 4 (#502c73)
+L 6 (#70b300)
+D 7 (#6c06e1)
+R 7 (#1000c2)
+D 2 (#9e6131)
+R 5 (#1000c0)
+U 2 (#20fc11)
+R 6 (#4fc970)
+U 11 (#836601)
+R 5 (#10c0a0)
+D 5 (#4cdfa1)
+R 3 (#9e7a52)
+D 8 (#1efc91)
+R 5 (#230502)
+D 10 (#997e91)
+R 3 (#606502)
+D 7 (#b87b23)
+R 9 (#70b382)
+D 7 (#e143c1)
+L 5 (#3c8752)
+D 5 (#08ff21)
+L 7 (#8bbaf0)
+D 5 (#52b461)
+R 12 (#6b3420)
+D 5 (#70ce63)
+L 9 (#38a330)
+D 3 (#93f4a3)
+R 2 (#752e20)
+D 10 (#802b21)
+R 5 (#306f80)
+D 5 (#563c21)
+R 8 (#306f82)
+D 3 (#2e5bc1)
+R 5 (#6bae00)
+D 3 (#95f2b1)
+L 13 (#286e20)
+D 4 (#1c17f3)
+R 4 (#2085b0)
+D 3 (#3a8d81)
+R 8 (#743280)
+D 5 (#3a8d83)
+L 5 (#769c70)
+D 3 (#1c17f1)
+L 8 (#0c45b0)
+D 3 (#43f2f1)
+L 4 (#43c9b0)
+D 6 (#06ca11)
+R 3 (#824a92)
+D 8 (#275081)
+R 8 (#c52910)
+D 9 (#677741)
+R 6 (#2263f0)
+D 2 (#30fc71)
+R 4 (#e78d02)
+D 5 (#2a6b21)
+R 11 (#824a90)
+D 6 (#1167b1)
+R 9 (#2d5730)
+D 8 (#63a741)
+R 6 (#79ca32)
+D 4 (#d3a311)
+R 8 (#6b0082)
+D 7 (#1e18a1)
+L 8 (#630ee2)
+D 6 (#271b51)
+R 3 (#20b8e2)
+D 6 (#502693)
+R 3 (#5e2982)
+D 6 (#519c73)
+R 5 (#426b22)
+D 2 (#6316a3)
+R 3 (#a094a0)
+D 9 (#13fd63)
+R 3 (#159c72)
+D 12 (#4a19f3)
+R 6 (#2ea222)
+D 3 (#4ff3e3)
+R 8 (#792c20)
+D 3 (#3d9173)
+R 4 (#792c22)
+D 7 (#5c1193)
+R 6 (#604e82)
+D 6 (#5b3771)
+R 3 (#4e0902)
+D 6 (#685f81)
+L 11 (#4e0900)
+D 5 (#25fff1)
+R 11 (#63e382)
+D 4 (#3d4d93)
+R 5 (#2f6682)
+D 3 (#3d4d91)
+R 8 (#d3cd42)
+D 3 (#4a19f1)
+R 5 (#4d60f2)
+D 3 (#4cab81)
+R 9 (#5a3bb0)
+D 5 (#9d4081)
+R 4 (#8bf760)
+D 4 (#312861)
+R 3 (#191a80)
+U 10 (#81a9d1)
+R 3 (#642c20)
+U 9 (#7c6fe1)
+R 7 (#6ba570)
+U 8 (#4f5c41)
+R 3 (#c90d22)
+U 5 (#45b391)
+L 4 (#c2fd52)
+U 5 (#0e4c01)
+L 6 (#4a2a62)
+U 8 (#c58881)
+R 5 (#4a0f92)
+U 4 (#0f46c1)
+R 13 (#a61822)
+D 3 (#0cd461)
+R 3 (#05aa52)
+D 5 (#02b481)
+R 6 (#3ac852)
+D 2 (#753603)
+R 7 (#0fbaa2)
+D 4 (#51ee63)
+R 14 (#8c3d12)
+D 3 (#8dca01)
+R 4 (#0fc982)
+D 6 (#395a61)
+R 4 (#57e672)
+U 6 (#02b483)
+R 12 (#423cf2)
+D 6 (#3447f1)
+R 5 (#892220)
+D 4 (#999421)
+L 3 (#676720)
+D 6 (#999423)
+L 7 (#5abd20)
+D 3 (#b449e1)
+L 2 (#6a69f0)
+D 6 (#1c7861)
+R 7 (#3898b0)
+D 6 (#79e643)
+L 7 (#a65d70)
+D 7 (#92d4c3)
+L 7 (#1f0ff0)
+U 6 (#748851)
+L 3 (#525540)
+D 7 (#471711)
+L 2 (#30c320)
+D 5 (#471713)
+L 4 (#7def00)
+U 2 (#598b61)
+L 4 (#75c6d2)
+U 10 (#085d03)
+L 3 (#55e0d2)
+U 6 (#085d01)
+R 5 (#355fc2)
+U 4 (#3ea751)
+R 11 (#2ce9f0)
+U 3 (#1c7863)
+L 7 (#51cd30)
+U 3 (#976e41)
+L 10 (#4f9750)
+D 5 (#1bfbb1)
+L 3 (#58a5c0)
+D 8 (#1beb31)
+L 10 (#5251d0)
+D 6 (#2c5001)
+L 3 (#63a530)
+D 7 (#5e69d1)
+L 7 (#1da410)
+D 6 (#815311)
+L 3 (#59eb40)
+D 7 (#b45de3)
+L 2 (#494d90)
+D 9 (#b45de1)
+L 8 (#646ee0)
+U 7 (#8093c1)
+L 4 (#7b5e60)
+U 5 (#2c2371)
+L 7 (#81f5a0)
+D 6 (#2e57a1)
+L 9 (#c8e0a0)
+D 6 (#0869d1)
+L 6 (#57dc30)
+U 9 (#b23011)
+L 3 (#82d280)
+D 4 (#9c7a61)
+L 9 (#436352)
+U 4 (#01ff51)
+L 5 (#870b32)
+D 5 (#48a8f1)
+L 4 (#1fb772)
+U 9 (#1d4661)
+L 5 (#4e52c0)
+U 9 (#a9a371)
+L 4 (#586fe0)
+U 3 (#0b9431)
+L 3 (#277592)
+D 4 (#14b641)
+L 4 (#3a0dc0)
+D 4 (#4455a1)
+R 5 (#5469b0)
+D 9 (#a84ea1)
+L 5 (#8e7772)
+D 4 (#335031)
+L 3 (#130b82)
+U 5 (#bc0881)
+L 8 (#717632)
+U 4 (#063d31)
+R 5 (#107a82)
+U 3 (#2a1d41)
+L 5 (#afce92)
+U 6 (#2a1d43)
+L 3 (#5defe2)
+U 5 (#063d33)
+R 8 (#2cd1d2)
+U 4 (#9c0681)
+L 5 (#1e4382)
+U 4 (#36ccb1)
+L 8 (#e207d2)
+D 3 (#36ccb3)
+L 5 (#5dc9c2)
+D 7 (#8ea673)
+R 5 (#137612)
+D 7 (#2a7283)
+L 8 (#6900b0)
+U 10 (#2f0cd3)
+L 6 (#7eac90)
+D 3 (#7ddfb3)
+L 4 (#6148d0)
+D 6 (#bf9c13)
+L 5 (#18df50)
+D 4 (#1355a3)
+R 5 (#60fd80)
+D 8 (#6d26c3)
+L 5 (#9d0910)
+D 2 (#6d26c1)
+L 4 (#0b62f0)
+U 6 (#1e4cb1)
+L 12 (#076920)
+U 4 (#b4a501)
+L 8 (#73a1b0)
+U 7 (#35ca73)
+R 5 (#4ac3d0)
+U 4 (#5fb103)
+R 2 (#4ac3d2)
+U 8 (#7eb2a3)
+R 4 (#606002)
+D 7 (#835373)
+R 2 (#2c6042)
+D 5 (#217003)
+R 7 (#5694d2)
+U 6 (#4362e3)
+L 4 (#8f6f82)
+U 9 (#3ea893)
+R 4 (#074f80)
+U 3 (#7f3203)
+R 8 (#1eee40)
+U 3 (#17dba3)
+R 5 (#958930)
+D 6 (#17dba1)
+R 5 (#41cfe0)
+U 3 (#2cff03)
+R 6 (#4ff132)
+U 6 (#5edd73)
+L 2 (#2fdd32)
+U 5 (#4f6a83)
+L 6 (#7dc872)
+U 5 (#4a4d43)
+L 9 (#d27932)
+U 3 (#4a8801)
+L 5 (#9e0cd2)
+U 3 (#a57a91)
+L 4 (#a6e7e0)
+U 4 (#adbef1)
+L 2 (#a6e7e2)
+U 10 (#476741)
+L 7 (#249cf0)
+U 4 (#9abc41)
+L 3 (#249cf2)
+U 3 (#4bb011)
+L 9 (#02ff22)
+U 7 (#6d4ea3)
+L 8 (#5ee6e2)
+U 6 (#61eb43)
+L 4 (#5ee6e0)
+U 7 (#607293)
+L 3 (#a6dd82)
+U 3 (#7acf31)
+L 8 (#579bb2)
+D 4 (#6f1ec1)
+L 7 (#579bb0)
+D 3 (#3a3891)
+L 4 (#49cfe2)
+D 5 (#1b2e01)
+L 5 (#696b92)
+U 12 (#733c23)
+L 4 (#1fef72)
+D 12 (#6485c3)
+L 4 (#08ff32)
+D 6 (#6792a3)
+R 8 (#929a72)
+D 3 (#22f4e1)
+R 6 (#32d2b2)
+D 4 (#a977b1)
+L 3 (#9b3ea2)
+D 6 (#ad3b21)
+L 5 (#716be2)
+D 9 (#9b4a11)
+R 8 (#01d322)
+D 3 (#1f6901)
+L 5 (#8defc2)
+D 6 (#453b51)
+L 9 (#3bf332)
+D 9 (#c4b591)
+R 4 (#62f012)
+D 5 (#6e3221)
+R 7 (#271ae2)
+D 4 (#5a8111)
+R 9 (#8e21a2)
+D 4 (#c26333)
+L 10 (#77d0d0)
+D 5 (#5d1b63)
+L 6 (#77d0d2)
+D 5 (#695443)
+L 7 (#009572)
+D 4 (#1a9de3)
+L 7 (#016772)
+D 2 (#5a0151)
+L 6 (#b606a2)
+D 4 (#5a0153)
+L 7 (#537112)
+D 3 (#0259c3)
+L 7 (#040d52)
+D 6 (#5a0893)
+L 5 (#a70252)
+D 9 (#5a5053)
+L 3 (#423eb2)
+D 4 (#555853)
+L 8 (#6560d0)
+D 3 (#235cc1)
+L 9 (#7ebac0)
+D 3 (#235cc3)
+L 2 (#052570)
+D 6 (#3999b3)
+L 5 (#717242)
+D 3 (#218633)
+L 5 (#3d2bc0)
+D 3 (#1eac81)
+L 7 (#d703a0)
+U 6 (#1eac83)
+L 3 (#6c2f50)
+U 3 (#500333)
+L 2 (#009570)
+U 4 (#caaf63)
+L 4 (#67b322)
+U 12 (#3fb3e3)
+L 3 (#91ae82)
+U 4 (#41e513)
+L 5 (#230d72)
+U 5 (#72a203)
+L 7 (#781422)
+D 5 (#0f87c1)
+L 3 (#ccb092)
+U 3 (#02c7c1)
+L 5 (#507412)
+U 2 (#0a7d21)
+L 4 (#6d22b0)
+U 12 (#5b8b11)
+L 3 (#0e39c2)
+U 3 (#4847e1)
+R 4 (#63e4b0)
+U 3 (#46cd91)
+R 9 (#63e4b2)
+U 3 (#59c031)
+R 4 (#0e39c0)
+D 6 (#07f351)
+R 3 (#6d22b2)
+U 9 (#0c6021)
+L 3 (#1ce1c2)
+U 11 (#303b83)
+L 6 (#453a82)
+D 3 (#0db0b1)
+L 4 (#6f51d2)
+D 8 (#2a9e11)
+L 4 (#256792)
+U 2 (#b9fc51)
+L 3 (#554e12)
+U 6 (#1a6743)
+R 2 (#425450)
+U 6 (#802a53)
+R 6 (#425452)
+U 5 (#57b983)
+R 6 (#24dab2)
+D 5 (#a861e3)
+R 5 (#03a640)
+U 5 (#0cf633)
+R 4 (#12e8b0)
+U 3 (#670cd3)
+R 7 (#9404a0)
+U 3 (#6b1da3)
+L 8 (#124400)
+U 4 (#490281)
+L 9 (#565b30)
+U 4 (#9605b1)
+L 3 (#340010)
+U 4 (#001871)
+L 4 (#0ce9d0)
+U 6 (#9ce363)
+L 7 (#954302)
+D 8 (#5e50d3)
+L 6 (#1bdbb0)
+D 4 (#bfa473)
+L 3 (#9282e0)
+D 6 (#adcac3)
+L 5 (#101580)
+U 3 (#3829f3)
+L 6 (#856420)
+U 6 (#13ee53)
+L 9 (#4f1fc0)
+U 4 (#beec51)
+R 8 (#27fce0)
+U 2 (#3af6b1)
+R 7 (#8c68b0)
+U 6 (#625da3)
+L 6 (#8094f2)
+U 5 (#00afc3)
+R 5 (#46b230)
+U 7 (#388223)
+R 9 (#792f52)
+D 6 (#c18f43)
+R 4 (#792f50)
+U 11 (#51b883)
+R 2 (#46b232)
+U 2 (#3e9823)
+R 3 (#9d1b32)
+D 5 (#32d503)
+R 3 (#167db2)
+D 8 (#b22773)
+R 4 (#4bca32)
+U 6 (#b64b13)
+R 8 (#227362)
+D 7 (#5ae973)
+R 10 (#8c0eb2)
+U 2 (#29cc41)
+R 3 (#350bf0)
+U 10 (#6a2c51)
+L 7 (#350bf2)
+U 2 (#7d3bf1)
+L 7 (#259fe2)
+U 8 (#745a53)
+L 6 (#c1add2)
+U 6 (#1063f3)
diff --git a/src/test/resources/2023/input_18_test.txt b/src/test/resources/2023/input_18_test.txt
new file mode 100644
index 00000000..e69de29b