Modifications

a4--a5--a6--a7--a8--a9;d2--b3--b4--b5;e2--c3--c4--c5;a1--a2d2--d3--d4-a3-d5-a4-d6;a1--e2--e3--e4--a5e5--a6e6;d6--a7;e6--a8a7;b5--a9a6;b3c5--a6;b4--b5a5;c4--a5;b3--a4;c3--a4;d3--b4;e3--c4;d4--b5;e4--c5;a1[shape=box label="Noeud 1a1" href="[[#Noeud 1a1]]" pos="0,9!"]a2a4[shape=box label="Noeud 2a4" href="[[#Noeud 2a4]]" pos="0,86!"]a3a5[shape=box label="Noeud 3a5" href="[[#Noeud 3a5]]" pos="0,75!"]a4a6[shape=box label="Noeud a6" href="[[#Noeud a6]]" pos="0,4!"]a7[shape=box label="Noeud a7" href="[[#Noeud 4a7]]" pos="0,63!"]a5a8[shape=box label="Noeud 5a8" href="[[#Noeud 5a8]]" pos="0,52!"]a6a9[shape=box label="Noeud 6a9" href="[[#Noeud 6a9]]" pos="0,41!"]a7b3[shape=box label="Noeud b3" href="[[#Noeud b3]]" pos="1,7!"]b4[shape=box label="Noeud b4" href="[[#Noeud b4]]" pos="1,6!"]b5[shape=box label="Noeud b5" href="[[#Noeud b5]]" pos="1,5!"]c3[shape=box label="Noeud c3" href="[[#Noeud c3]]" pos="-1,7!"]c4[shape=box label="Noeud c4" href="[[#Noeud c4]]" pos="-1,6!"]c5[shape=box label="Noeud c5" href="[[#Noeud c5]]" pos="0-1,35!"]a8d2[shape=box label="Noeud d2" href="[[#Noeud d2]]" pos="2,8!"]d3[shape=box label="Noeud d3" href="[[#Noeud d3]]" pos="2,7!"]d4[shape=box label="Noeud d4" href="[[#Noeud d4]]" pos="2,6!"]d5[shape=box label="Noeud d5" href="[[#Noeud d5]]" pos="2,5!"]d6[shape=box label="Noeud d6" href="[[#Noeud d5]]" pos="2,4!"]e2[shape=box label="Noeud e2" href="[[#Noeud e2]]" pos="-2,8!"]e3[shape=box label="Noeud e3" href="[[#Noeud e3]]" pos="0-2,7!"]e4[shape=box label="Noeud e4" href="[[#Noeud e4]]" pos="-2,6!"]a9e5[shape=box label="Noeud e5" href="[[#Noeud e5]]" pos="-2,5!"]e6[shape=box label="Noeud 9e6" href="[[#Noeud 9e6]]" pos="0-2,14!"]

=Noeud Niveau 1===Noeud a1===Niveau 2===Noeud d2====Noeud e2===Niveau 3===Noeud b3====Noeud c3====Noeud d3====Noeud e3===Etc...=