--- a/nono.py	Fri Jul 18 21:54:39 2025 +0100
+++ b/nono.py	Sat Aug 09 15:48:34 2025 -0400
@@ -3,6 +3,22 @@
 #  > fgrep 'task = ' nono10.xhtml|tr ';' '\n' | fgrep task\ = | sed 's/^.*= //'| tr -d \'
 #  E.g. 8/5.1/2.3/2.1/4.3/3.4/2/1.1/3/5.2/2.2/2.2/1.3.2/5.1/3.1.1/2/2.3.1/7.1/1.1.2/3.2
 
+#######  New Plan #######
+# All that matters is runs of incomplete cells.  We begin with n+n runs, the maximum number is
+#  sum(len(rn) for rn in rows U cols)
+# My own strategy seems to be FIFO for pass 0, then LIFO, for the queue of new/changed runs
+# By cases, wrt types of change of a cell in its runs
+# Change at the margin:
+#  New fill: complete the run and discard it, kill the other end and queue it
+#      dead: advance margin and add fill to any internal sequences of fills (always?), queue the new fill(s)
+# Change in the middle
+#  New dead: If deterministic, split the run in two and requeue the cell (now in two runs)
+#      fill: If deterministic single gap at any end, kill, split, and requeue the cell (now in two runs)
+#----------
+# Doesn't yet cover everything, e.g. killing gaps that are too small to be filled
+# Do we need to actually represent run-internal segments, e.g. skips and bars?
+
+
 import sys
 
 Red=''
@@ -263,9 +279,18 @@
     self.val=v
     return True
 
-class Nono(dict):
+class Nono(list):
+  
   # 0,0 is upper left, so increasing y goes _downwards_, to match the standard layout
-  def __init__(self,runsPerRow,runsPerCol,debug):
+  def __getitem__(self,xy):
+    return list.__getitem__(self,xy[1])[xy[0]]
+
+  def __setitem__(self,xy,v):
+    list.__getitem__(self,xy[1])[xy[0]] = v
+
+  def __init__(self,runsPerRow: list[int],
+               runsPerCol: list[int],
+               debug: bool) -> list[list[Cell]]:
     global SOLVER
     self.loop=0
     self.dp='' # old depth hack
@@ -273,6 +298,7 @@
     self.dstate=[]
     SOLVER=self
     n=self.n=len(runsPerCol)
+    list.__init__(self,list(list(list(range(n)) for _ in range(n))))
     if n!=len(runsPerRow):
       print("losing r:%s x c:%s"%(len(runsPerRow),n),sys.stderr)
       exit(1)
@@ -283,7 +309,7 @@
     self.rows=rr=[Row(n,self,i) for i in range(n)]
     for x in range(n):
       for y in range(n):
-        self[(x,y)]=Cell(rr[y],y,cc[x],x)
+        self[x,y]=Cell(rr[y],y,cc[x],x)
     # Need cells in place for the following
     for row,runs in zip(rr,runsPerRow):
       row.initRuns(runs)