Après f2=f3=18, b1=i1=67 et gratte-ciel des 1 a3a8.i8i6-e3e46 => f6 <> 1
_|__a_______b______c___|__d_______e______f___|___g______h_____i
1|_2a5A____67_______8__|_2459___2349___2359_|__1_____4A9a____67
2|__9_____136_____2A3a_|_2a4A___7________18_|_34a68___5_____368
3|_1e5a7__137_______4__|_5A9a___18_______6__|_389A____2_____378
4|_467_____347____3A57_|__8_____126____1257_|_23456___13467___9
5|_678____378y9â____1__|_25679__269______4__|_23568____367___23568
6|_4678_____2_____579Â_|__3_____169_____579_|_4568____1467___1568
7|__3_____1G78Y9___279_|_2679____5____278y9_|_269_____1g69____4
8|_1E247__1479______6__|_2479___2349___2379_|_2359______8____1G235
9|_248y_____5_____2d9D_|__1____234689__2389_|__7_______369___236
1) Interdit GE (1 b7a8) ea (a3) Ad (2 c2c9) DÂ (9 c9c6) ây (b5) YG (b7) => G faux, h7=1, i6=1, 9A en h9 => AD
2) Interdit Ad (2 c2c9) DA (9 h9c9) => A faux, a1=2, etc. au bout.