... or has at least parts of Rybka code inside.
Try positions with Kings only, you will have the same behaviour in all of this positions:
4K3/8/4k3/8/8/8/8/8 w - - 0 1
Rybka:
213.490<--1:info depth 3 score cp -28 time 1 nodes 114 nps 116736 pv e8f8
213.490<--1:info depth 4 score cp -22 time 1 nodes 335 nps 343040 pv e8f8
213.490<--1:info depth 5 score cp -28 time 1 nodes 619 nps 633856 pv e8f8 e6f6
213.490<--1:info depth 6 score cp -22 time 1 nodes 1331 nps 1362944 pv e8f8 e6f6 f8e8
213.490<--1:info depth 7 score cp -16 time 1 nodes 2411 nps 2468864 pv e8f8 e6f6 f8e8 f6e5
213.490<--1:info depth 8 score cp -10 time 1 nodes 4296 nps 4399104 pv e8f8 e6f6 f8e8 f6e5 e8e7
213.490<--1:info depth 9 score cp -16 time 1 nodes 5804 nps 5943296 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7
213.490<--1:info depth 10 score cp -10 time 1 nodes 8634 nps 8841216 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7
213.507<--1:info depth 11 score cp 0 time 1 nodes 15453 nps 15823872 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5c5 d7e6
Strelka:
226.897<--1:info depth 5 score cp -28 time 0 nodes 229 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7
226.897<--1:info depth 6 score cp -22 time 0 nodes 448 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5
226.897<--1:info depth 7 score cp -28 time 0 nodes 811 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7
226.897<--1:info depth 8 score cp -22 time 0 nodes 1569 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5e5
226.897<--1:info depth 9 score cp -16 time 0 nodes 2893 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5d4 d7e6
226.914<--1:info depth 10 score cp -10 time 0 nodes 4891 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5d4 d7e6 d4e4
226.914<--1:info depth 11 score cp -16 time 0 nodes 6678 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5d4 d7e6 d4e4 e6d6
226.914<--1:info depth 12 score cp -10 time 0 nodes 9715 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7d7 d5d4 d7e6 d4e4 e6d6 e4d4
226.914<--1:info depth 13 score cp 0 time 0 nodes 18640 nps 0 pv e8f8 e6f6 f8e8 f6e5 e8e7 e5d5 e7f6 d5e4 f6e6 e4d4 e6d6 d4e4 d6e6
substract 2 of Strelka's depth and you will see there is always the same score in King vs. King positions. Note that Strelka gives more info strings as Rybka.
Though I defended Strelka in the past, this looks like a real evidence for me. STrelka is a clone.
OK Chris, you where right
Best,
Alex