diff --git a/src/command/FocusCommand.swift b/src/command/FocusCommand.swift
index 1daf7fb9..d4898fad 100644
--- a/src/command/FocusCommand.swift
+++ b/src/command/FocusCommand.swift
@@ -23,7 +23,7 @@ struct FocusCommand: Command { // todo speed up. Now it's slightly slow (probabl
             guard let index = topMostChild.ownIndexOrNil else { return }
             let mruIndexMap = currentWindow.workspace.mruWindows.mruIndexMap
             let windowToFocus: Window? = parent.children
-                .getOrNil(atIndex: index + direction.offset)?
+                .getOrNil(atIndex: index + direction.focusOffset)?
                 .allLeafWindowsRecursive(snappedTo: direction.opposite)
                 .minBy { mruIndexMap[$0] ?? Int.max }
             windowToFocus?.focus()
diff --git a/src/command/MoveThroughCommand.swift b/src/command/MoveThroughCommand.swift
index 14125d0e..4a77891c 100644
--- a/src/command/MoveThroughCommand.swift
+++ b/src/command/MoveThroughCommand.swift
@@ -6,7 +6,7 @@ struct MoveThroughCommand: Command {
         guard let currentWindow = focusedWindowOrEffectivelyFocused else { return }
         if let parent = currentWindow.parent as? TilingContainer {
             let indexOfCurrent = currentWindow.ownIndex
-            let indexOfSiblingTarget = indexOfCurrent + direction.offset
+            let indexOfSiblingTarget = indexOfCurrent + direction.focusOffset
             if parent.orientation == direction.orientation && parent.children.indices.contains(indexOfSiblingTarget) {
                 switch parent.children[indexOfSiblingTarget].kind {
                 case .tilingContainer(let topLevelSiblingTargetContainer):
@@ -68,7 +68,7 @@ private func deepMoveIn(window: Window, into container: TilingContainer, moveDir
         .drop(while: { $0 != container })
         .dropFirst()
         .toArray()
-    let deepTarget = container.findContainerWithOrientOrPreferredPath(moveDirection.orientation, preferredPath)
+    let deepTarget = container.findDeepMoveInTargetRecursive(moveDirection.orientation, preferredPath)
     switch deepTarget.kind {
     case .tilingContainer:
         window.unbindFromParent()
@@ -86,7 +86,7 @@ private func deepMoveIn(window: Window, into container: TilingContainer, moveDir
 }
 
 private extension TreeNode {
-    func findContainerWithOrientOrPreferredPath(_ orientation: Orientation, _ preferredPath: [TreeNode]) -> TreeNode {
+    func findDeepMoveInTargetRecursive(_ orientation: Orientation, _ preferredPath: [TreeNode]) -> TreeNode {
         switch kind {
         case .window:
             return self
@@ -96,7 +96,7 @@ private extension TreeNode {
             } else {
                 assert(children.contains(preferredPath.first!))
                 return preferredPath.first!
-                    .findContainerWithOrientOrPreferredPath(orientation, Array(preferredPath.dropFirst()))
+                    .findDeepMoveInTargetRecursive(orientation, Array(preferredPath.dropFirst()))
             }
         case .workspace:
             error("Impossible")
diff --git a/src/tree/TreeNode.swift b/src/tree/TreeNode.swift
index 21fd5b54..a6e7ba6d 100644
--- a/src/tree/TreeNode.swift
+++ b/src/tree/TreeNode.swift
@@ -93,7 +93,7 @@ class TreeNode: Equatable {
         if let window = self as? Window {
             let newParentWorkspace = newParent.workspace
             newParentWorkspace.mruWindows.pushOrRaise(window)
-            newParentWorkspace.assignedMonitor = window.getCenter()?.monitorApproximation
+            newParentWorkspace.assignedMonitor = window.getCenter()?.monitorApproximation // todo here we may write nil
             // Update currentEmptyWorkspace since it's no longer effectively empty
             if newParentWorkspace == currentEmptyWorkspace {
                 currentEmptyWorkspace = getOrCreateNextEmptyWorkspace()
@@ -106,8 +106,9 @@ class TreeNode: Equatable {
         guard let _parent else { return nil }
         let workspace = workspace
         if let window = self as? Window {
-            precondition(workspace.mruWindows.remove(window)) /* todo lock screen -> false assert (for some reasons
-                                                                 all windows are placed into current active workspace) */
+            // todo lock screen -> false assert (for some reasons all windows are placed into current active workspace)
+            // todo chrome close "cmd F" window with esc -> false assert
+            precondition(workspace.mruWindows.remove(window), "mru.remove \(window.title)")
         }
 
         let index = _parent._children.remove(element: self) ?? errorT("Can't find child in its parent")
diff --git a/src/util/CardinalDirection.swift b/src/util/CardinalDirection.swift
index 215ba201..eda300d0 100644
--- a/src/util/CardinalDirection.swift
+++ b/src/util/CardinalDirection.swift
@@ -17,6 +17,6 @@ extension CardinalDirection {
             return .left
         }
     }
-    var offset: Int { isPositive ? 1 : -1 }
+    var focusOffset: Int { isPositive ? 1 : -1 }
     var insertionOffset: Int { isPositive ? 1 : 0 }
 }