Both agree it is a pin25 of 46,527
17... Bd4 18. Qxd4 Nf3+ 19. Kg2 Nxd4
Lichess labelled attraction, fork, pin
Lichess says pin, Koga does not25 of 301,678
20... Rh2+ 21. Kf1 Rh1+ 22. Ng1 Rxg1+ 23. Kxg1 Rh1#
Lichess labelled attraction, pin
41. Rxe7+ Kf6 42. Rxg6+ Kxe7 43. Rxc6 Kd7 44. Rc5
Lichess labelled pin, skewer
Koga says pin, Lichess does not25 of 63,184
27. Rdg3 Qf6 28. Rxg7+ Kxg7 29. Qh7+ Kf8 30. Qxb7
Lichess labelled attraction, skewer
20... Qxd4 21. Ne7+ Kf7 22. exd4 Rxc1 23. Rxc1 Bxg2
Lichess labelled — (none mapped)
26. Qxb6 Rxb6 27. Rxb7 Rxb7 28. Bxd5+ Kf8 29. Bxb7
Lichess labelled attraction, capturingDefender, fork
26... Qc2+ 27. Ke3 Qe2+ 28. Kf4 Qxf2+ 29. Kg4 Bf5+
Lichess labelled — (none mapped)