and as a proof that this is an hashpower matters, the difficult is already 12665240.411003 after 5 min i took the screenshot, while 100 blocks before it was 12198582.656297

update:
block 1570323

Block	Difficulty
1570223	11946096.727004
1570323	12026720.890824
1570423	11930541.575989
1570523	12191819.41785
1570623	12641359.116998

look the spike on the last 100 blocks, where the weird blocks were noticeable
and after having pumped the SHA256, the miner started pumping Scrypt (look how Scrypt difficult rise so fast)

1570640   Scrypt   2017-01-21 01:56:54   11   1042.900586   1770.7510423757
1570639   Scrypt   2017-01-21 01:56:12   8   723.259173   1769.2141296503
1570638   Scrypt   2017-01-21 01:55:57   10   957.605   1768.409901675
1570637   SHA256   2017-01-21 01:55:43   12   1146.661759   12662469.055522
1570636   Scrypt   2017-01-21 01:54:52   11   1031.849   1767.5038365382
1570635   Scrypt   2017-01-21 01:53:54   10   937.396759   1766.1599145315
1570634   Scrypt   2017-01-21 01:53:26   11   1047.717145   1765.2256807371
1570633   SHA256   2017-01-21 01:53:01   11   1076.502759   12661739.953015
1570632   Scrypt   2017-01-21 01:52:30   11   1048.007145   1764.1895263484
1570631   Scrypt   2017-01-21 01:51:41   8   758.127172   1763.226972119
1570630   SHA256   2017-01-21 01:51:07   10   931.034074   12672393.19249
1570629   Scrypt   2017-01-21 01:50:47   6   544.209   1762.2943915493
1570628   Scrypt   2017-01-21 01:49:51   12   1143.643073   1760.9396047451
1570627   Scrypt   2017-01-21 01:49:24   9   857.269173   1759.949581106
1570626   Scrypt   2017-01-21 01:48:32   11   1036.334487   1761.7818564724
1570625   SHA256   2017-01-21 01:47:24   12   1189.400759   12665240.411003
1570624   SHA256   2017-01-21 01:46:32   8   718.374487   12653288.495869
1570623   SHA256   2017-01-21 01:46:26   11   4141.269322   12641359.116998
1570622   SHA256   2017-01-21 01:46:20   11   1037.782246   12630903.071409
1570621   SHA256   2017-01-21 01:45:59   9   872.578   12620754.041186


as you said, this block generation isn't compatible with a turn based game. A turn based system must have a stable timer, or as much stable as possible, or at very least a minimum granted time (about the minimum granted time, i think this is difficult because bitcoin doesn't have a reliable timer, date and times aren't reliable neither)