1Ba4+??−14.1...Blunder. Best move was c4+.1.c4+Kxc42.b3+Kxd43.exf6e54.Be7exf45.f7Ra81...Kxa4−14.01...Kc42.Bb3+Kb53.Ba4+2b3+−14.7Kb5−14.63c4+−14.7Kc6−14.24d5+−17.4Kd7−14.85e6+−17.8Kxd8−18.06f5−18.2
1.Ba4+??−14.11.c4+
WilliamRoma's Chess Studies: Chapter 13
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kramnikstudent1engine shows -18.1 at depth 53 in the final position