diff --git a/hyper.h b/hyper.h
index f56e750b..15330ffc 100644
--- a/hyper.h
+++ b/hyper.h
@@ -1524,6 +1524,7 @@ void addauraspecial(const hyperpoint& h, int col, int dir);
 void drawBug(const cellwalker& cw, int col);
 
 void mainloop();
+void mainloopiter();
 extern bool showstartmenu;
 void selectLanguageScreen();
 
diff --git a/kohonen.cpp b/kohonen.cpp
index cb441ff1..896d09bb 100644
--- a/kohonen.cpp
+++ b/kohonen.cpp
@@ -30,6 +30,8 @@ struct neuron {
   int samples, csample, bestsample;
   };
 
+vector<string> colnames;
+
 kohvec weights;
 
 vector<neuron> net;
@@ -94,10 +96,12 @@ void loadsamples(const char *fname) {
   bigbreak:
   fclose(f);
   samples = size(data);
-  normalize();  
+  normalize();
+  colnames.resize(cols);
+  for(int i=0; i<cols; i++) colnames[i] = "Column " + its(i);
   uninit(0); sominit(1);
   }
-
+                  
 int tmax = 30000;
 double distmul = 1;
 double learning_factor = .1;
@@ -178,7 +182,7 @@ void coloring() {
       vector<double> listing;
       for(neuron& n: net) switch(c) {
         case -4:
-          listing.push_back(n.samples);
+          listing.push_back(log(5+n.samples));
           break;
           
         case -3:
@@ -477,6 +481,42 @@ void uninit(int initto) {
   if(inited > initto) inited = initto;
   }
 
+void showsample(int id) {
+  for(int ii: samples_shown) 
+    if(ii == id) 
+      return;
+  int i = vdata.size();
+  samples_shown.push_back(id);
+  vdata.emplace_back();
+  auto& v = vdata.back();
+  v.name = data[id].name;
+  v.cp = dftcolor;
+  createViz(i, cwt.c, Id);
+  v.m->store();
+  }
+
+void showsample(string s) {
+  if(s == "") return;
+  for(int i=0; i<samples; i++) {
+    if(s[0] != '*' && data[i].name == s)
+      showsample(i);
+    if(s[0] == '*' && data[i].name.find(s.substr(1)) != string::npos)
+      showsample(i);
+    }
+  }
+
+void showbestsamples() {
+  vector<int> samplesbak;
+  for(auto& n: net) 
+    if(n.samples)
+      showsample(n.bestsample);
+  analyze();
+  for(auto& n: net) n.samples = 0;
+  for(int i=0; i<samples; i++) 
+    if(whowon[i])
+      whowon[i]->samples++;
+  }
+  
 void sominit(int initto) {
 
   if(inited < 1 && initto >= 1) {
@@ -563,19 +603,151 @@ void describe(cell *c) {
   if(cmode & sm::HELP) return;
   neuron *n = getNeuronSlow(c);
   if(!n) return;
-  help += "cell number: " + its(neuronId(*n)) + "\n";
+  help += "cell number: " + its(neuronId(*n)) + " (" + its(n->samples) + ")\n";
   help += "parameters:"; for(int k=0; k<cols; k++) help += " " + fts(n->net[k]); 
   help += ", u-matrix = " + fts(n->udist);
   help += "\n";
-  int qty = 0;
-  for(int s=0; s<samples; s++) if(whowon[s] == n) {
+  vector<pair<double, int>> v;
+  for(int s=0; s<samples; s++) if(whowon[s] == n) v.emplace_back(vnorm(n->net, data[s].val), s);
+  random_shuffle(v.begin(), v.end());
+  sort(v.begin(), v.end(), [] (auto a, auto b) { return a.first < b.first; });
+  
+  for(int i=0; i<size(v) && i<20; i++) {
+    int s = v[i].second;
     help += "sample "+its(s)+":"; 
     for(int k=0; k<cols; k++) help += " " + fts(data[s].val[k]); 
     help += " "; help += data[s].name; help += "\n";
-    qty++; if(qty >= 20) break;
     }
   }
 
+namespace levelline {
+
+  struct levelline {
+    int column, qty;
+    unsigned int color;
+    vector<double> values;
+    bool modified;
+    };
+  
+  vector<levelline> levellines;
+  
+  bool on;
+  
+  void create() {
+    int xlalpha = int(pow(ld(.5), ggamma) * 255);
+    for(int i=0; i<cols; i++) {
+      levellines.emplace_back();
+      levelline& lv = levellines.back();
+      lv.column = i;    
+      lv.color = ((hrandpos() & 0xFFFFFF) << 8) | xlalpha;
+      lv.qty = 0;
+      }
+    }
+  
+  void build() {
+    if(levellines.size() == 0) create();
+    on = false;
+    for(auto& lv: levellines) {
+      if(!lv.qty) { lv.values.clear(); continue; }
+      on = true;
+      if(!lv.modified) continue;
+      lv.modified = false;
+      vector<double> sample;
+      for(int j=0; j<=1024; j++) sample.push_back(data[hrand(samples)].val[lv.column]);
+      sort(sample.begin(), sample.end());
+      lv.values.clear();
+      lv.values.push_back(-1e10);
+      for(int j=0; j<=1024; j+=1024 >> (lv.qty)) lv.values.push_back(sample[j]);
+      lv.values.push_back(1e10);
+      }
+    }
+  
+  void draw() {
+    if(!on) return;
+    for(auto& g: gmatrix) {
+      cell *c1 = g.first;
+      transmatrix T = g.second;
+      neuron *n1 = getNeuron(c1);
+      if(!n1) continue;
+      for(int i=0; i<c1->type; i++) {
+        cell *c2 = c1->mov[i];
+        if(!c2) continue;
+        cell *c3 = c1->mov[i ? i-1 : c1->type-1];
+        if(!c3) continue;
+  
+        if(!gmatrix.count(c2)) continue;
+        if(!gmatrix.count(c3)) continue;
+        double d2 = hdist(tC0(T), tC0(gmatrix[c2]));
+        double d3 = hdist(tC0(T), tC0(gmatrix[c3]));
+        
+        neuron *n2 = getNeuron(c2);
+        if(!n2) continue;
+        neuron *n3 = getNeuron(c3);
+        if(!n3) continue;
+              
+        for(auto& l: levellines) {
+          auto val1 = n1->net[l.column];
+          auto val2 = n2->net[l.column];
+          auto val3 = n3->net[l.column];
+          auto v1 = lower_bound(l.values.begin(), l.values.end(), val1);
+          auto v2 = lower_bound(l.values.begin(), l.values.end(), val2);
+          auto v3 = lower_bound(l.values.begin(), l.values.end(), val3);
+          auto draw = [&] () {
+            auto vmid = *v1;
+            queueline(
+              tC0(T * ddspin(c1,i) * xpush(d2 * (vmid-val1) / (val2-val1))), 
+              tC0(T * ddspin(c1,i-1) * xpush(d3 * (vmid-val1) / (val3-val1))), 
+              l.color);
+            };
+          while(v1 < v2 && v1 < v3) {
+            draw();
+            v1++;
+            }
+          while(v1 > v2 && v1 > v3) {
+            v1--;
+            draw();
+            }
+          }
+        }      
+      }
+    setindex(false);
+    }
+
+  void show() {
+    if(levellines.size() == 0) create();
+    gamescreen(0);
+    cmode = vid.xres > vid.yres * 1.4 ? sm::SIDE : 0;
+    dialog::init("level lines");
+    char nx = 'a';
+    for(auto &l : levellines) {
+      dialog::addSelItem(colnames[l.column], its(l.qty), nx++);
+      dialog::lastItem().colorv = l.color >> 8;
+      }
+    dialog::addItem("exit menu", '0');
+    dialog::addItem("shift+letter to change color", 0);
+    dialog::display();
+    keyhandler = [] (int sym, int uni) {
+      dialog::handleNavigation(sym, uni);
+      if(uni >= 'a' && uni - 'a' + size(levellines)) {
+        auto& l = levellines[uni - 'a'];
+        dialog::editNumber(l.qty, 0, 10, 1, 0, colnames[l.column], 
+          XLAT("Controls the number of level lines."));
+        dialog::reaction = [&l] () {
+          l.modified = true;
+          build();
+          };
+        }
+      else if(uni >= 'A' && uni - 'A' + size(levellines)) {
+        auto& l = levellines[uni - 'A'];
+        dialog::openColorDialog(l.color, NULL);
+        }
+      else if(doexiton(sym, uni)) popScreen();
+      };
+    }
+
+  
+  }
+
 void ksave(const char *fname) {
   sominit(1);
   FILE *f = fopen(fname, "wt");
@@ -586,7 +758,7 @@ void ksave(const char *fname) {
   fprintf(f, "%d %d\n", cells, t);
   for(neuron& n: net) {
     for(int k=0; k<cols; k++)
-      fprintf(f, "%.4lf ", n.net[k]);
+      fprintf(f, "%.9lf ", n.net[k]);
     fprintf(f, "\n");
     }
   fclose(f);
@@ -612,26 +784,64 @@ void kload(const char *fname) {
   analyze();
   }
 
-void kclassify(const char *fname) {
+void ksavew(const char *fname) {
   sominit(1);
-  for(neuron& n: net) n.samples = 0;
-
-  FILE *f = fopen(fname, "wt");  
+  FILE *f = fopen(fname, "wt");
   if(!f) {
-    fprintf(stderr, "Could not save classification\n");
+    fprintf(stderr, "Could not save the weights\n");
     return;
     }
-  for(int id=0; id<samples; id++) {
-    auto& w = winner(id);
-    w.samples++;
-    if(id % 100000 == 0) printf("%d/%d\n", id, size(data));
-    fprintf(f, "%s;%d\n", data[id].name.c_str(), neuronId(w));
-    }
+  for(int i=0; i<cols; i++)
+    fprintf(f, "%s=%.9lf\n", colnames[i].c_str(), weights[i]);
   fclose(f);
-  coloring();
   }
 
-void kclassify2(const char *fname_classify, const char *fname_samples) {
+void kloadw(const char *fname) {
+  sominit(1);
+  FILE *f = fopen(fname, "rt");
+  if(!f) {
+    fprintf(stderr, "Could not load the weights\n");
+    return;
+    }
+  for(int i=0; i<cols; i++) {
+    string s1, s2;
+    char kind = 0;
+    while(true) {
+      int c = fgetc(f);
+      if(c == 10 || c == 13 || c == -1) {
+        if(s1 == "" && !kind && c != -1) continue;
+        if(s1 != "") colnames[i] = s1;
+        if(kind == '=') weights[i] = atof(s2.c_str());
+        if(kind == '*') weights[i] *= atof(s2.c_str());
+        if(kind == '/') weights[i] /= atof(s2.c_str());
+        if(c == -1) break;
+        goto nexti;
+        }
+      else if(c == '=' || c == '/' || c == '*') kind = c;
+      else (kind?s2:s1) += c;
+      }
+    nexti: ;
+    }
+  fclose(f);
+  analyze();
+  }
+
+
+unsigned lastprogress;
+void progress(string s) {
+  if(SDL_GetTicks() >= lastprogress + (noGUI ? 500 : 100)) {
+    if(noGUI)
+      printf("%s\n", s.c_str());
+    else {
+      clearMessages();
+      addMessage(s);
+      mainloopiter();
+      }
+    lastprogress = SDL_GetTicks();
+    } 
+  }
+
+void kclassify(const char *fname_classify) {
 
   sominit(1);
   vector<double> bdiffs(samples, 1e20);
@@ -646,9 +856,10 @@ void kclassify2(const char *fname_classify, const char *fname_samples) {
       double diff = vnorm(net[n].net, data[s].val);
       if(diff < bdiffs[s]) bdiffs[s] = diff, bids[s] = n, whowon[s] = &net[n];
       }
-    if(s % 1000000 == 999999) printf("%d/%d\n", s, samples);
+    if(!(s % 128))
+      progress("Classifying: " + its(s) + "/" + its(samples));
     }
-
+  
   vector<double> bdiffn(cells, 1e20);
 
   printf("Finding samples...\n");
@@ -673,30 +884,55 @@ void kclassify2(const char *fname_classify, const char *fname_samples) {
       fclose(f);
       }
     }
+  coloring();
+  }
 
+void klistsamples(const char *fname_samples, bool best, bool colorformat) {
   if(fname_samples != NULL) { 
-    printf("Listing best samples...\n");
+    printf("Listing samples...\n");
     FILE *f = fopen(fname_samples, "wt");  
     if(!f) {
       printf("Failed to open file\n");
       }
     else {
-      fprintf(f, "%d\n", cols);
-      for(int n=0; n<cells; n++) {
-        fflush(f);
-        if(!net[n].samples) { fprintf(f, "\n"); continue; }
-        int s = net[n].bestsample;
-        for(int k=0; k<cols; k++)
-          fprintf(f, "%.4lf ", data[s].val[k]);
-        fflush(f);
-        fprintf(f, "!%s\n", data[s].name.c_str());
-        fflush(f);
-        }
+      auto klistsample = [f, colorformat] (int id, int neu) {
+        if(colorformat) {
+          fprintf(f, "%s;+#%d\n", data[id].name.c_str(), neu);
+          }
+        else {
+          for(int k=0; k<cols; k++)
+            fprintf(f, "%.4lf ", data[id].val[k]);
+          fprintf(f, "!%s\n", data[id].name.c_str());
+          }
+        };
+      if(!colorformat) fprintf(f, "%d\n", cols);
+      if(best)
+        for(int n=0; n<cells; n++) {
+          if(!net[n].samples) { if(!colorformat) fprintf(f, "\n"); continue; }
+          klistsample(net[n].bestsample, n);
+          }
+      else
+        for(int i=0; i<size(samples_shown); i++) 
+          klistsample(samples_shown[i], neuronId(*(whowon[i])));  
       fclose(f);
       }
     }
+  }
 
-  coloring();
+void neurondisttable(const char *fname) {
+  FILE *f = fopen(fname, "wt");
+  if(!f) {
+    printf("Could not open file: %s\n", fname);
+    return;
+    }
+  int neurons = size(net);
+  fprintf(f, "%d\n", neurons);
+  for(int i=0; i<neurons; i++) {
+    for(int j=0; j<neurons; j++) fprintf(f, "%3d", celldistance(net[i].where, net[j].where));
+    // todo: build the table correctly for gaussian=2
+    fprintf(f, "\n");
+    }
+  fclose(f);
   }
 
 void steps() {
@@ -717,9 +953,11 @@ void showMenu() {
     else if(whattodraw[i] == -4) c = "number of samples";
     else if(whattodraw[i] == -5) c = "best sample's color";
     else if(whattodraw[i] == -6) c = "sample names to colors";
-    else c = "column " + its(whattodraw[i]);
+    else c = colnames[whattodraw[i]];
     dialog::addSelItem(XLAT("coloring (%1)", parts[i]), c, '1'+i);
     }
+  dialog::addItem("coloring (all)", '0');
+  dialog::addItem("level lines", '4');
   }
 
 bool handleMenu(int sym, int uni) {
@@ -734,6 +972,10 @@ bool handleMenu(int sym, int uni) {
     for(char x: {'1','2','3'}) handleMenu(x, x);
     return true;
     }
+  if(uni == '4') {
+    pushScreen(levelline::show);
+    return true;
+    }
   return false;
   }
 
@@ -800,7 +1042,10 @@ int readArgs() {
   // #4: run, stop etc.
   else if(argis("-somrunto")) {
     int i = argi();
-    shift(); while(t > i) kohonen::step();
+    shift(); while(t > i) {
+      if(t % 128 == 0) progress("Steps left: " + its(t));
+      kohonen::step();
+      }
     }
   else if(argis("-somstop")) {
     t = 0;
@@ -809,7 +1054,10 @@ int readArgs() {
     noshow = true;
     }
   else if(argis("-somfinish")) {
-    while(!finished()) kohonen::step();
+    while(!finished()) {
+      kohonen::step();
+      if(t % 128 == 0) progress("Steps left: " + its(t));
+      }
     }
 
   // #5 save data, classify etc.
@@ -817,22 +1065,43 @@ int readArgs() {
     PHASE(3);
     shift(); kohonen::ksave(args());
     }
+  else if(argis("-somsavew")) {
+    PHASE(3);
+    shift(); kohonen::ksavew(args());
+    }
+  else if(argis("-somloadw")) {
+    PHASE(3);
+    shift(); kohonen::kloadw(args());
+    }
   else if(argis("-somclassify")) {
     PHASE(3);
     shift(); kohonen::kclassify(args());
     }
-  else if(argis("-somclassify2")) {
+  else if(argis("-somlistshown")) {
     PHASE(3);
-    shift(); const char *f1 = args();
-    shift(); const char *f2 = args();
-    kohonen::kclassify2(f1, f2);
+    shift(); kohonen::klistsamples(args(), false, false);
+    }
+  else if(argis("-somlistbest")) {
+    PHASE(3);
+    shift(); kohonen::klistsamples(args(), true, false);
+    }
+  else if(argis("-somlistbestc")) {
+    PHASE(3);
+    shift(); kohonen::klistsamples(args(), true, true);
+    }
+  else if(argis("-somndist")) {
+    PHASE(3);
+    shift(); kohonen::neurondisttable(args());
+    }
+  else if(argis("-somshowbest")) {
+    showbestsamples();
     }
 
   else return 1;
   return 0;
   }
 
-auto hooks = addHook(hooks_args, 100, readArgs);
+auto hooks = addHook(hooks_args, 100, readArgs) + addHook(hooks_frame, 50, levelline::draw);
 }
 
 void mark(cell *c) {
diff --git a/rogueviz.cpp b/rogueviz.cpp
index f3c19a72..c85fc8a7 100644
--- a/rogueviz.cpp
+++ b/rogueviz.cpp
@@ -29,6 +29,8 @@ bool specialmark = false;
 
 bool rog3 = false;
 
+ld ggamma = .5;
+
 string fname;
 
 // const char *fname;
@@ -1027,8 +1029,6 @@ void queuedisk(const transmatrix& V, const colorpair& cp, bool legend) {
   if(cp.shade == 'm') queuepoly(V, shDiskM, cp.color2);
   }
 
-ld ggamma = .5;
-
 void drawVertex(const transmatrix &V, cell *c, shmup::monster *m) {
   if(m->dead) return;
   int i = m->pid;
@@ -1292,7 +1292,16 @@ void readcolor(const char *cfname) {
     
     colorpair x;
     int c2 = fgetc(f);
-    if(c2 == '=') {
+    if(kohonen::samples && c2 == '+') {
+      kohonen::showsample(lab);
+      c2 = fgetc(f);
+      if(c2 == 10 || c2 == 13) continue;
+      }
+    if(c2 == '#') {
+      while(c2 != 10 && c2 != 13 && c2 != -1) c2 = fgetc(f);
+      continue;
+      }
+    else if(c2 == '=') {
       string lab2 = "";
       while(true) {
         int c = fgetc(f);
@@ -1326,6 +1335,12 @@ void readcolor(const char *cfname) {
           vdata[i].cp = x;
           }
       }
+    else if(kohonen::samples) {
+      for(int i=0; i<size(vdata); i++)
+        if(vdata[i].name == lab) {
+          vdata[i].cp = x;
+          }
+      }
     else {
       int i = getid(lab);
       again: vdata[i].cp = x;