Back to Le Monde's version starting with two 1 to be placed where we want. Well... surprise... records are probably NOT the same than the version starting with only one 1. Except only for 4x4 (and the obvious 2x2). I was too fast saying that the rules were equivalent... Not intuitive, but it is often interesting to scatter the two 1! I obtain these better scores, only modifying the beginning of the grids, then using exactly my same "snail" strategy. Results obtained by hand and Excel, not sure that they are the best possible. Only 5X5 is, if no error, the best possible result. ----5x5 score 349712 (vs 297136 with the other version) 1 7 11 33 33 2 4 22 99 165 1 30272 16581 286 550 97477 67204 13662 2508 836 349712 185031 6688 4180 836 ----6x6 score 162857852 (vs 128493518 in the other version) 1 7 11 33 99 99 2 4 22 66 330 528 1 15218576 53335420 162857852 924 1782 4935745 10282802 27833950 81681728 5412 2706 3084840 1850904 411312 70356 24354 8118 616968 616968 205656 135300 40590 8118 ----7x7 score 164912612349 (vs 139015458134 in the other version) ----8x8 score 639561837115046 (vs 541048181546137 in the other version) I can also send these 7x7 and 8x8 grids if somebody wishes, but easy to create using my previous 7x7 and 8x8. http://oeis.org/A221866 need some changes, should be: 1, 4, 57, 2473, 349712 (however, warning, 1x1 can't be played, because we need to place two 1) http://oeis.org/A224784 remain the same: 1, 4, 44, 2473, 297136 Christian.