diff --git a/ms_board.c b/ms_board.c
index 02a2dad..cfd8b0f 100644
--- a/ms_board.c
+++ b/ms_board.c
@@ -13,6 +13,7 @@
 #include "ms_board.h"
 
 #include "config.h"
+#include <stdlib.h>
 
 struct MsBoardData {
     Count column_count;
@@ -31,7 +32,7 @@ static MsBoard the_board = 0;
  */
 MsBoard msb_get_board() {
     if (the_board == 0) {
-        the_board = (MsBoard)GC_MALLOC(sizeof(struct MsBoardData));
+        the_board = (MsBoard)calloc(1, sizeof(struct MsBoardData));
     }
     return the_board;
 }
@@ -54,6 +55,8 @@ void msb_init_board(MsBoard board, Count column_count, Count row_count) {
     board->column_count = column_count > MAX_BOARD_SIZE ? MAX_BOARD_SIZE : column_count;
     board->row_count = row_count > MAX_BOARD_SIZE ? MAX_BOARD_SIZE : row_count;
 
+    msc_reset_cell_factory();
+
     for (int row = 0; row < board->row_count; row++) {
         for (int col = 0; col < board->column_count; col++) {
             board->cells[col][row] = msc_produce_cell();
diff --git a/ms_cell.c b/ms_cell.c
index 0a30241..98c69d1 100644
--- a/ms_cell.c
+++ b/ms_cell.c
@@ -12,8 +12,169 @@
 
 #define CELL_COUNT MAX_BOARD_SIZE * MAX_BOARD_SIZE
 
+#include <stdlib.h>
+#include "ms_cell.h"
+
 /** Implementation of cell data */
+struct MsCellData {
+    CellIdx idx;
+    bool covered;
+    CellMarker marker;
+    bool mine;
+    Count dangerous_neighbor_count;
+};
 
 /** Maximum amount of cell instances */
+static MsCell cells[CELL_COUNT] = {0};
 
 /** The number of produced cells */
+static Count produced_cells = 0;
+
+/**
+ * Provides another, yet unused instance, initialized Mine Sweeper cell
+ * The provided cell is covered, carries no marker, no mine, and has 0 dangerous neighbors.
+ * 
+ * Up to `MAX_BOARD_SIZE * MAX_BOARD_SIZE` cells can be produced by subsequent
+ * calls of this function.
+ * 
+ * @return The fresh cell instance or 0, if no more instance is available.
+ */
+MsCell msc_produce_cell() {
+    if (produced_cells >= CELL_COUNT) {
+        return 0;
+    }
+
+    if (cells[produced_cells] == 0) {
+        cells[produced_cells] = (MsCell)calloc(1, sizeof(struct MsCellData));
+    }
+
+    MsCell cell = cells[produced_cells];
+    cell->idx = produced_cells;
+    cell->covered = true;
+    cell->marker = NONE;
+    cell->mine = false;
+    cell->dangerous_neighbor_count = 0;
+
+    produced_cells++;
+    return cell;
+}
+
+/**
+ * Resets the internal cell factory. Function `msc_produce_cell` is capable
+ * to produce the full number of cell after this function is called.
+ */
+void msc_reset_cell_factory() {
+    produced_cells = 0;
+}
+
+/**
+ * Determines whether or not the given cell is valid.
+ * A cell is NOT valid, if it is 0 or has a neighbor mine count
+ * greater than 8.
+ * 
+ * @param cell The cell instance in focus.
+ * @return True if the given cell is valid, false otherwise.
+ */
+bool msc_is_valid(MsCell cell) {
+    return cell != 0 && cell->dangerous_neighbor_count <= 8;
+}
+
+/**
+ * Determines whether or not the given cell is currently covered.
+ * 
+ * @param cell The cell instance in focus.
+ * @return True if the given cell is covered, false otherwise.
+ */
+bool msc_is_covered(MsCell cell) {
+    return cell != 0 && cell->covered;
+}
+
+/**
+ * Uncovers the given cell.
+ * If the cell carries a veritable marker (detected or suspected)
+ * or is already uncovered, the request is ignored. Otherwise 
+ * function `msc_is_covered` returns `false` for this cell afterwards.
+ * 
+ * Note: an uncovered cell cannot be covered again.
+ * 
+ * @param cell The cell instance in focus.
+ * @return True if the cell was successfully uncovered, false otherwise.
+ */
+bool msc_uncover(MsCell cell) {
+    if (!msc_is_valid(cell) || !cell->covered || cell->marker != NONE) {
+        return false;
+    }
+
+    cell->covered = false;
+    return true;
+}
+
+/**
+ * Determines whether or not the given cell carries a mine.
+ * 
+ * @param cell The cell instance in focus.
+ * @return True if the cell carries a mine, false otherwise.
+ */
+bool msc_has_mine(MsCell cell) {
+    return cell != 0 && cell->mine;
+}
+
+/**
+ * Specifies that the given cell carries a mine. 
+ * Invocations for invalid cells are ignored.
+ * 
+ * @param cell The cell instance in focus.
+ */
+void msc_drop_mine(MsCell cell) {
+    if (msc_is_valid(cell)) {
+        cell->mine = true;
+    }
+}
+
+/**
+ * Provides the number of direct neighbor cells, which carries a mine.
+ * 
+ * @param cell The cell instance in focus.
+ * @return The number between 0 to 8 that encounters the neighbor cells
+ * that carries a mine or 255 if the cell is not valid.
+ */
+Byte msc_get_dangerous_neighbor_count(MsCell cell) {
+    return msc_is_valid(cell) ? cell->dangerous_neighbor_count : 0xFF;
+}
+
+/**
+ * Increments (+1) the count of neighbor cells that carries a mine. 
+ * Invocations for invalid cells are ignored.
+ * 
+ * @param cell The cell instance in focus.
+ */
+void msc_inc_dangerous_neighbor_count(MsCell cell) {
+    if (msc_is_valid(cell)) {
+        cell->dangerous_neighbor_count++;
+    }
+}
+
+/**
+ * Provides the given marker of the given cell.
+ * 
+ * @param cell The cell instance in focus.
+ * @return The marker carried by the cell 
+ *         or `NONE`, if the cell is not valid.
+ */
+CellMarker msc_get_marker(MsCell cell) {
+    return msc_is_valid(cell) ? cell->marker : NONE;
+}
+
+/**
+ * Applies the given marker to the given cell. The marker is cleared 
+ * by applying a 'none' marker. 
+ * Invocations for invalid cells are ignored.
+ * 
+ * @param cell The cell instance in focus.
+ * @param marker The marker to apply.
+ */
+void msc_set_marker(MsCell cell, CellMarker marker) {
+    if (msc_is_valid(cell)) {
+        cell->marker = marker;
+    }
+}
diff --git a/ms_ui_utils.c b/ms_ui_utils.c
index 850d925..ff6095c 100644
--- a/ms_ui_utils.c
+++ b/ms_ui_utils.c
@@ -23,5 +23,160 @@ CellIdx msu_get_random_index(Count upper_limit) {
     return (upper_limit == 0 ? 0 : rand() % (upper_limit));
 }
 
+/**
+ * Maps the given cell index to the corresponding column address.
+ * 
+ * @param idx The index to map.
+ * @return ColAddr The corresponding column address or a '0' value,
+ * if the index cannot be mapped.
+ */
+ColAddr msu_idx_to_col_address(CellIdx idx) {
+    if (idx > 0 && idx <= MAX_BOARD_SIZE) {
+        return (ColAddr)idx;
+    }
+    return 0;
+}
 
+/**
+ * Maps the given cell index to the corresponding row address.
+ * 
+ * @param idx The index to map.
+ * @return RowAddr The corresponding row address or a '0' value,
+ * if the index cannot be mapped.
+ */
+RowAddr msu_idx_to_row_address(CellIdx idx) {
+    if (idx > 0 && idx <= MAX_BOARD_SIZE) {
+        return (RowAddr)idx;
+    }
+    return 0;
+}
+
+/**
+ * Maps the given column address to the corresponding cell index.
+ * 
+ * @param addr The column address to map.
+ * @return CellIdx The corresponding cell index or 0,
+ * if the address cannot be mapped.
+ */
+CellIdx msu_col_address_to_index(ColAddr addr) {
+    if (addr > 0 && addr < MAX_BOARD_SIZE) {
+        return (CellIdx)addr;
+    }
+    return 0;
+}
+
+/**
+ * Maps the given row address to the corresponding cell index.
+ * 
+ * @param addr The row address to map.
+ * @return CellIdx The corresponding cell index or 0,
+ * if the address cannot be mapped.
+ */
+CellIdx msu_row_address_to_index(RowAddr addr) {
+    if (addr > 0 && addr < MAX_BOARD_SIZE) {
+        return (CellIdx)addr;
+    }
+    return 0;
+}
+
+/**
+ * Provides the character a user may type to perform the given action.
+ * The key must be unique for each action.
+ * 
+ * @param action The action for which the corresponding 'key' is requested.
+ * @return char The corresponding 'key' character or '\0',
+ * if the action cannot reasonably be mapped.
+ */
+char msu_get_action_char(Action action) {
+    switch (action) {
+        case MARK_MINE:
+            return 'm';
+        case MARK_SUSPECT:
+            return 's';
+        case CLEAR_MARKER:
+            return 'c';
+        case UNCOVER:
+            return 'u';
+        case QUIT_GAME:
+            return 'q';
+        default:
+            return '\0';
+    }
+}
+
+/**
+ * Provides the action for the given 'key' character (the counterpart of ´msu_get_action_char´).
+ * 
+ * @param key The key for the action.
+ * @return Action The action corresponding to the given 'key' 
+ *         or 'INVALID',if the key cannot be mapped.
+ */
+Action msu_get_action(char key) {
+    switch (key) {
+        case 'm':
+            return MARK_MINE;
+        case 's':
+            return MARK_SUSPECT;
+        case 'c':
+            return CLEAR_MARKER;
+        case 'u':
+            return UNCOVER;
+        case 'q':
+            return QUIT_GAME;
+        default:
+            return UNKNOWN;
+    }	
+}
+
+/**
+ * Maps the given cell marker to its presentation symbol
+ * (the character shown in the game visualization).
+ * 
+ * @param marker The marker.
+ * @return char The corresponding character or '#', if
+ * the marker cannot be mapped.
+ */
+char msu_get_marker_symbol(CellMarker marker) {
+    switch (marker) {
+        case NONE:
+            return ' ';
+        case MINE_DETECTED:
+            return 'X';
+        case MINE_SUSPECTED:
+            return '?';
+        default:
+            return '#';
+    }
+}
+
+/**
+ * Provides the symbol that represents a mine
+ * (the character shown in the game visualization).
+ * 
+ * @return char The symbol of a mine.
+ */
+char msu_get_mine_symbol() {
+    return '*';
+}
+
+/**
+ * Maps the given game status to a user presentable label.
+ * 
+ * @param status The status to map.
+ * @return char* The text for the status or 0, if
+ * the status cannot be mapped.
+ */
+char* msu_get_status_label(GameState status) {
+    switch (status) {
+        case IN_PROGRESS:
+            return "In Progress";
+        case SOLVED:
+            return "Solved";
+        case FAILED:
+            return "Failed";
+        case INVALID:
+        default:
+            return "Invalid";
+    }
+}
 
diff --git a/ms_ui_utils.h b/ms_ui_utils.h
index 0bce0f5..70fc369 100644
--- a/ms_ui_utils.h
+++ b/ms_ui_utils.h
@@ -15,6 +15,7 @@
 #define ___MS_UI_UTILS_H
 
 #include "general.h"
+#include "config.h"
 
 /**
  * Initializes the random number generator. It must be invoked
@@ -67,15 +68,6 @@ CellIdx msu_col_address_to_index(ColAddr addr);
  */
 CellIdx msu_row_address_to_index(RowAddr addr);
 
-/**
- * Maps the given column address to the corresponding cell index.
- * 
- * @param addr The column address to map.
- * @return CellIdx The corresponding cell index or 0,
- * if the address cannot be mapped.
- */
-CellIdx msu_col_address_to_index(ColAddr addr);
-
 /**
  * Provides the character a user may type to perform the given action.
  * The key must be unique for each action.