Helping Benko

In round 22 of the 1962 Candidates tournament, Pal Benko with the Black pieces had a crushing attack against Bobby Fischer. However, he failed to find the knockout blow and then blundered in time pressure. Black can force checkmate from all of the positions below, which might have occurred had Benko played slightly differently. Perhaps, also, Fisher needed to err to reach these positions.

Warm Up (mate in three)

Black to move

Black to move

Slightly Challenging (mate in five)

Black to move

Challenge (mate in seven and nine)

Black to move

Black to move