diff --git a/src/config_brain_calculations.js b/src/config_brain_calculations.js
new file mode 100644
index 000000000..fccc796dd
--- /dev/null
+++ b/src/config_brain_calculations.js
@@ -0,0 +1,179 @@
+'use strict';
+
+brain.getFullPath = function* (startRoom, startId, targetRoom, targetId) {
+  const route = Game.rooms[startRoom].findRoute(startRoom, targetRoom);
+  route.splice(0, 0, {room: startRoom});
+  for (let routePos = 0; routePos < route.length; ++routePos) {
+    yield* Game.rooms[route[routePos].room].getPath(route, routePos, startId, targetId, false);
+  }
+};
+
+const mem = {};
+brain.getFullPathMemory = (sourceRoom, sourceId, targetRoom, targetId) => {
+  const key = `${sourceRoom}:${sourceId}-${targetRoom}:${targetId}`;
+  if (!mem[key]) {
+    mem[key] = Array.from(brain.getFullPath(sourceRoom, sourceId, targetRoom, targetId))
+  }
+  return mem[key];
+};
+
+brain.getRoadsForRoom = (baseRoom, targetRoom, roads = {}) => {
+  const sources = Game.rooms[targetRoom].find(FIND_SOURCES);
+  for (let source of sources) {
+    for (let road of brain.getFullPathMemory(baseRoom, 'pathStart', targetRoom, source.id)) {
+      roads[road] = road;
+    }
+  }
+  return roads;
+};
+
+brain.getRoadsMaintainCostPerTick = (baseRoom, ...targetRooms) => {
+  const harvestPathRoads = {};
+  for (let road of brain.getFullPathMemory(baseRoom, 'pathStart', baseRoom, 'harvester')) {
+    harvestPathRoads[road] = road;
+  }
+  const roads = {};
+  for (let targetRoom of targetRooms) {
+    brain.getRoadsForRoom(baseRoom, targetRoom, roads);
+  }
+  let decaySum = 0;
+  for (let pos of _.values(roads)) {
+    if (!harvestPathRoads.hasOwnProperty(pos)) {
+      decaySum += ROAD_DECAY_AMOUNT / ROAD_DECAY_TIME * (pos.lookFor(LOOK_TERRAIN)[0] === 'swamp' ? CONSTRUCTION_COST_ROAD_SWAMP_RATIO : 1);
+    }
+  }
+  return decaySum * REPAIR_COST;
+};
+
+brain.getSourcersMaintainCostPerTick = (baseRoom, ...targetRooms) => {
+  const creepCost = BODYPART_COST[WORK] * 5 + BODYPART_COST[MOVE] * 3 + BODYPART_COST[CARRY];
+  let totalCost = 0;
+  for (let targetRoom of targetRooms) {
+    const sources = Game.rooms[targetRoom].find(FIND_SOURCES);
+    for (let source of sources) {
+      const pathToSource = brain.getFullPathMemory(baseRoom, 'pathStart', targetRoom, source.id);
+      totalCost += creepCost / (CREEP_LIFE_TIME - pathToSource.length);
+    }
+  }
+  return totalCost;
+};
+
+brain.getReserversMaintainCostPerTick = (baseRoom, ...targetRooms) => {
+  const creepCost = BODYPART_COST[CLAIM] + BODYPART_COST[MOVE];
+  let totalCost = 0;
+  for (let targetRoom of targetRooms) {
+    const roads = brain.getRoadsForRoom(baseRoom, targetRoom);
+    let pathTime = 0;
+    for (let pos of brain.getFullPathMemory(baseRoom, 'pathStart', targetRoom, Game.rooms[targetRoom].controller.id)) {
+      if (!roads.hasOwnProperty(pos) && pos.lookFor(LOOK_TERRAIN)[0] === 'swamp') {
+        pathTime += 5;
+      } else {
+        pathTime += 1;
+      }
+    }
+    totalCost += creepCost / (CREEP_CLAIM_LIFE_TIME - pathTime);
+  }
+  return totalCost;
+};
+
+brain.getCarryOptimalSize = (baseRoom, targetRoom, targetId) => {
+  const roundtripLength = brain.getFullPathMemory(baseRoom, 'pathStart', targetRoom, targetId).length * 2;
+  const throughput = roundtripLength * SOURCE_ENERGY_CAPACITY / ENERGY_REGEN_TIME;
+  const optimalSize = Math.floor((throughput / CARRY_CAPACITY - 1) / 2);
+  console.log('optimal carry size for', baseRoom, '-', targetRoom, targetId, 'is', optimalSize, 'capacity', Math.floor(throughput / CARRY_CAPACITY) * CARRY_CAPACITY);
+  return optimalSize;
+};
+
+brain.getCarryCost = size => BODYPART_COST[WORK] + BODYPART_COST[MOVE] * (size + 1) + BODYPART_COST[CARRY] * (size * 2 + 1);
+
+brain.getCarriesMaintainCostPerTick = (baseRoom, ...targetRooms) => {
+  let totalCost = 0;
+  for (let targetRoom of targetRooms) {
+    const sources = Game.rooms[targetRoom].find(FIND_SOURCES);
+    for (let source of sources) {
+      const optimalSize = brain.getCarryOptimalSize(baseRoom, targetRoom, source.id);
+      let needCount = 1;
+      while (brain.getCarryCost(Math.floor(optimalSize / needCount)) > Game.rooms[baseRoom].energyCapacityAvailable) {
+        ++needCount;
+      }
+      const creepCost = brain.getCarryCost(Math.floor(optimalSize / needCount));
+      console.log('we need', needCount, 'carries, each costs', creepCost);
+      totalCost += creepCost / CREEP_LIFE_TIME;
+    }
+  }
+  return totalCost;
+};
+
+brain.getTotalSourcersIncomePerTick = (baseRoom, ...targetRooms) => {
+  let totalIncome = 0;
+  for (let targetRoom of targetRooms) {
+    const sources = Game.rooms[targetRoom].find(FIND_SOURCES);
+    for (let source of sources) {
+      totalIncome += SOURCE_ENERGY_CAPACITY / ENERGY_REGEN_TIME;
+    }
+  }
+  return totalIncome;
+};
+
+brain.printTotalExternalMaintainCosts = (baseRoom, ...targetRooms) => {
+  const roads = brain.getRoadsMaintainCostPerTick(baseRoom, ...targetRooms);
+  const soucers = brain.getSourcersMaintainCostPerTick(baseRoom, ...targetRooms);
+  const reservers = brain.getReserversMaintainCostPerTick(baseRoom, ...targetRooms);
+  const carries = brain.getCarriesMaintainCostPerTick(baseRoom, ...targetRooms);
+  const Income = brain.getTotalSourcersIncomePerTick(baseRoom, ...targetRooms);
+  console.log('roads per decay =', roads * ROAD_DECAY_TIME, 'per tick =', roads);
+  console.log('soucers per life =', soucers * CREEP_LIFE_TIME, 'per tick =', soucers);
+  console.log('reservers per life =', reservers * CREEP_CLAIM_LIFE_TIME, 'per tick =', reservers);
+  console.log('carries per life =', carries * CREEP_LIFE_TIME, 'per tick =', carries);
+  console.log('Income per regen =', Income * ENERGY_REGEN_TIME, 'per tick =', Income);
+  const total = roads + soucers + reservers + carries;
+  console.log('total costs per normal creep life =', total * CREEP_LIFE_TIME, 'per tick =', total);
+  console.log('net profit per normal creep life =', (Income - total) * CREEP_LIFE_TIME, 'per tick =', Income - total);
+};
+
+brain.getTimeForBuildUpRoads = (baseRoom, targetRoom, ...readyRooms) => {
+  const readyRoads = {};
+  for (let road of brain.getFullPathMemory(baseRoom, 'pathStart', baseRoom, 'harvester')) {
+    readyRoads[road] = road;
+  }
+  for (let readyRoom of readyRooms) {
+    brain.getRoadsForRoom(baseRoom, readyRoom, readyRoads);
+  }
+
+  const roads = brain.getRoadsForRoom(baseRoom, targetRoom);
+  let totalBuildCost = 0;
+  for (let pos of _.values(roads)) {
+    if (!readyRoads.hasOwnProperty(pos)) {
+      totalBuildCost += CONSTRUCTION_COST[STRUCTURE_ROAD] * (pos.lookFor(LOOK_TERRAIN)[0] === 'swamp' ? CONSTRUCTION_COST_ROAD_SWAMP_RATIO : 1);
+    }
+  }
+  // TODO estimate roads that builded by several carries
+  const buildTime = totalBuildCost / BUILD_POWER;
+  // TODO correctly estimate time for moving between construction sites
+  const moveTimeRatio = 2;
+  return buildTime * moveTimeRatio;
+};
+
+brain.printCostOfCreepsWhileBuildingUpRoads = (baseRoom, targetRoom, ...readyRooms) => {
+  // Withou roads sourcer and reserver needs more time to move by path, so we need to build it more often. Some average ratio for this
+  const costRatio = 1.1;
+  const buildTime = brain.getTimeForBuildUpRoads(baseRoom, targetRoom, ...readyRooms);
+  const soucers = brain.getSourcersMaintainCostPerTick(baseRoom, targetRoom);
+  const reservers = brain.getReserversMaintainCostPerTick(baseRoom, targetRoom) * costRatio;
+  const carries = brain.getCarriesMaintainCostPerTick(baseRoom, targetRoom) * costRatio;
+  console.log('time to build up', buildTime);
+  console.log('soucers', soucers * buildTime, 'per tick =', soucers);
+  console.log('reservers', reservers * buildTime, 'per tick =', reservers);
+  console.log('carries', carries * buildTime, 'per tick =', carries);
+  // TODO estimate the income while building up roads, depending on path length, swamp ratio and carry capacity
+  const total = soucers + reservers + carries;
+  console.log('total', total * buildTime, 'per tick =', total);
+};
+
+// console.log(Array.from(brain.getFullPath('E44S99', 'pathStart', 'E44S99', '58dbc91934e898064bcc2cb4')).length);
+// console.log(Array.from(brain.getFullPath('E44S99', 'pathStart', 'E44S98', '58dbc4c68283ff5308a3f86b')).length);
+// console.log(brain.getRoadsForRoom('E44S99', 'E44S98').length);
+// console.log(brain.getRoadsMaintainCostPerTick('E44S99', 'E44S98') * ROAD_DECAY_TIME);
+// console.log(brain.getSourcersMaintainCostPerTick('E44S99', 'E44S98') * CREEP_LIFE_TIME);
+// console.log(brain.getReserversMaintainCostPerTick('E44S99', 'E44S98') * CREEP_CLAIM_LIFE_TIME);
+// brain.printTotalExternalMaintainCosts('E44S99', 'E44S98');
diff --git a/src/require.js b/src/require.js
index 537b2a820..fd0d770c3 100644
--- a/src/require.js
+++ b/src/require.js
@@ -59,3 +59,4 @@ require('role_storagefiller');
 require('role_structurer');
 require('role_towerfiller');
 require('role_upgrader');
+require('config_brain_calculations');