17 OCTOBER 1970, Page 10

CHESS

Solution to No. 511 (Loshinslci—IC5B1/ pR6/k7/3p4/705n1R/4n3/133802) : Q-B2, threat Qx P. 1 . . B-Q5; 2 Q x QKt. 1 . . . P-Q5; 2 B-B4. 1 . . . Kt(7)-Q5; 2 Q-QR2. 1 ... Kt(6)-Q5; 2 R-R3. 1 ... R-Q5; 2 R-R6. Five interferences on the same square.