DrMAL: Kasparov adopted his Scheveningen with Najdorf move order against Short who did not hesitate to go 9.g4 and castle long. 11...Nde5 instead of 11...Nxd4 invited 12.Nxc6 bxc6 with open b-file instead of c-file for counterattack. Short paid no attention to prophylaxis such as 14.Kb1 and went straight for g5. But then Short's inconsistent "finesse" 15.Ba7 merely lost a tempo, letting black equalize. Here is computer line for reference.
Houdini_20_x64: 32/80 12:13:17 461,289,041,783
0.00 15. ... Rb7 16.Bd4 Nd7 17.exd5 cxd5 18.f4 Qa5
Play followed line exactly, 19.Qe3 evaluates second to 19.h5 but difference is meaningless. But purpose of 19.Qe3 Nb8 is to go 20.Qe5 forcing 20...f6 (21.gxf6 Bxf6 22.Qd6) to trade Bs and Qs for draw. Instead, Short played aggressively with 20.f5 but this favored black. 20.Qe5 threatens mate so that black cannot go 20...Nc6 (20...f6 was forced). Here, 20...Nc6 threatens B which cannot move, forcing 21.f6 which is artificial threat because after 21...Nxd4 black has check on e2 so that 21.fxe7 Nxe2+ 23.Qxe2 Re8 loses white pawn. It is interesting that computer evaluates this pawn sac as OK anyway because of 22...Bc5!
Houdini_20_x64: 28/68 39:28 24,651,543,579
-0.49 22.fxe7 Nxe2+ 23.Qxe2 Re8 24.Rd3 Qb4 25.b3
-0.52 22.Qxd4 Bc5 23.Qe5 g6 24.Kb1 Qb4 25.b3
However, Short took B with R instead of Q, 22.Rxd4?! where 22...Bc5! is even stronger, pinning R to Q. Both played out line afterwards accurately until Short again played inconsistent move 24.Rhd1?! instead of 24.h5 or 24.Qf4 to continue attack. Kasparov played 24...Qb4! again best move, threatening b2 then with beautiful 25...e5! decided game 26.Qxe5 was best but loses.
Rest of game is interesting but not as instructive, Kasparov had B for two connected passed pawns but power of his pieces in endgame was already decisive. Game was sophisticated both players being genius attackers in sharp doubled-edged battle. But Kasparov was simply both more accuarate and perfectly consistent, either quality was probably enough for eventual victory but game here demonstrated superiority of his technique in both areas. In such a game it is critical to be 100% focused.