Garry Kasparov has provided an analysis of the endgame, and our event commentator, Danny King, has reviewed the analysis and added a few notes of his own.

At the end of 124 days play, The World has done the decent thing and conceded the game. Coinciding with this decision, today Garry Kasparov announced a forced mate in 25 moves (!) after 62.....Qc6+ 63. Kg5. An emphatic way to conclude the game. The main line runs:

63.....Qd5+
64.Qf5 Qg2+   (64...Qd8 65.Kh6 is mate in 22)
65.Qg4 Qd5+
66.Kh4! Qg8
(instead if 66...Qh1+ 67.Kg3 Qe1+ 68.Kf4 Qd2+ 69.Kf5 Qc2+ 70.Kg5 Qc5+ 71.Kh4 d3 72.g8(Q) Qf2+ 73.Qg3 Qf6+ 74.Kg4 Qd4+ 75.Kh3 Kb2 76.Qg2+ Kc1 77.Qh1+ Kd2 78.Qa2+ Ke3 79.Qe1+ Kf4 80.Qf7+ Kg5 81.Qd2+ Qe3+82.Qxe3 mate)
67.Qf4+ Kc2
68.Qf8 Qh7+
69.Kg5 Qh2
70.g8(Q) Qg3+
71.Kf5 Qf3+
72.Ke6 Qb3+
73.Kd6 Qb4+
74.Ke5 Qe1+
75.Kxd4
now it's mate in 12. For example:
75....Qa1+ 76.Ke4 Qa4+ 77.Ke3 Qa7+ 78.Kf3 Qb7+ 79.Kg3 Qc7+ 80.Qf4 Qxf4+ 81.Kxf4 Kd3 82.Qb3+ Kd4 83.Qb5 Kc3 84.Ke3 Kc2 85.Qb4 Kc1 86.Kd3 Kd1 87.Qd2
mate

If Black deviates from this line, then checkmate arrives even sooner. A very "computery" variation!

I would like to thank everyone involved in this event over the last four months for making it such a success, the four analysts, the World Team, all those at Microsoft who worked so hard behind the scenes, and the World Champion himself, Garry Kasparov, whose commitment to the game was total.

-- Danny King