Viktor Korchnoi vs. Peterson
Chess puzzle form a simul, Viktor Korchnoi vs. Peterson, Kiev, 1964.
White to move and win in 4.
Roll over to see the solution:
1. Qg7+ Ke8 2. Qxe7+ Kxe7 3. Rg7+ Ke8 4. Nf6#
r2r1n2/pp2bk2/2p1p2p/3q4/3PN1QP/2P3R1/P4PP1/5RK1 w - - 0 1
About the players
Viktor Korchnoi (1931-2016) Grand Master (1956-2016) and International Master (1954-1956). Peak rating 2695. Defected from USSR to the Netherlands in 1976.