Is it legal to castle twice...IN THE SAME GAME!!!

Believe it or not...this Irish chess champion has the dubious distinction of being the ONLY man to have castled TWICE in the same game!! 

Wolfgang Heidenfeld had previously defeated the former World Champ Max Euwe and had victories against Miguel Najdorf.

He was a six - time Irish Champion from 1956 - 1972. 

We now go to the game...Heidenfeld vs Kerins, Dublin 1973

Here are the positions after moves 9, 16, and 32:

See position below, after move 9...Na5 (notice the white king is uncastled)

See position below, after move 16.Qg2 (notice that the white king had castled kingside on move 10)

Now See position below, as it stands after move 32...Qf5

AND RIGHT BEFORE HE CASTLES AGAIN...THIS TIME QUEENSIDE!!!

  So...TO SUM IT UP...Heidenfeld castles kingside on move 10 and THEN queenside on move 33!

1.e4 e6 2.d4 d5 3.Be3 Nf6 4.e5 Nfd7 5.f4 c5 6.c3 Nc6 7.Nf3 Qb6 8.Qd2 c4 9.Be2 Na5 10.O-O f5 11.Ng5 Be7 12.g4 Bxg5 13.fxg5 Nf8 14.gxf5 exf5 15.Bf3 Be6 16.Qg2 O-O-O 17.Na3 Ng6 18.Qd2 f4 19.Bf2 Bh3 20.Rfb1 Bf5 21.Nc2 h6 22.gxh6 Rxh6 23.Nb4 Qe6 24.Qe2 Ne7 25.b3 Qg6+ 26.Kf1 Bxb1 27.bxc4 dxc4 28.Qb2 Bd3+ 29.Ke1 Be4 30.Qe2 Bxf3 31.Qxf3 Rxh2 32.d5 Qf5 33.O-O-O Rh3 34.Qe2 Rxc3+ 35.Kb2 Rh3 36.d6 Nec6 37.Nxc6 Nxc6 38.e6 Qe5+ 39.Qxe5 Nxe5 40.d7+ Nxd7 0-1

That must have been some awful good Irish Whiskey SOMEBODY was drinkin'!!