Above expectation — Kasparov, move 18: 18.Qb3

Kasparov – The World · 1999

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r . . . . . . .
. p . k p p b p
. p n p . . p .
. . . . . . . .
P . . . q . . .
. . . . . . . .
. P . . . P P P
R . B Q . R K .
position after 17…Qxe4 — White to move
Kasparov, Garry 1–0 The World
Candidate moveExpectation (White)Move probabilityLoss vs bestExpected lossActual loss
18.Qb3 ★ played0.55244.5%×0.000=0.0000.000
18.Be30.45823.6%×0.093=0.022—
18.Ra30.42418.3%×0.128=0.023—
18.Re10.40812.3%×0.144=0.018—
Other moves—1.3%———
Sum—100%—0.0640.000
XPA = (0.064 − 0.000) × 100 = +6.4