20 DECEMBER 1957, Page 29

CHESS SOLUTION

SIJNYFR.-4K 1 bb 1 3N1prq 1 6PR 1 QSpr 1 p2N3k I PPIpIPP1 1 1p1PRPIB 1 b3b2b. Position 53 moves before this must have been 6bb 1 pppNpprq I 3pNIPR I 6pr 16k1 1 P4nIp I IPPPPPPI I IRB QKB2.

Minimum: (a) qrrb2n1 1 nbk1p3 I plpIPpIp I PpP2PIP IIPI p4 1 13KIP2p1 I QRB3PI I NRNS.

(b) brnIBRRB I qknQpKNp I rbIpPpIN I pIpPIPpP I PIP3 PI 1p6 IP6 8.

(c) rqrb4 I nbklp3 I plpIP3 I PpP3p1 1 lP3pPp 13p1PlP 1 3PI KBN 14BRQR.

Maximum: (a) r6R I Ippbp1k1 13N1NB1 14g3 I 2Q5 I 1n3n 2I 3BIbK1 1 R6r.

(b) nInIrlrl I 1PIPIPIP 1303k 1 1133q2 1 3Q3b 11K3b2 I ip 1piplp I RIRININI. (c) IQqQqQq1 1 r6R 1 k6K 1 q6Q I B6b I q6Q 1 Q6q 1 IqQqQqQ1 lI SiOCCIII: 2846 13r2PI 14P2b 12N5 13k2BR 12NIn3 IrinK2

bq 12Q5. 11 checks by I P-Kt K-B 5; 2 Kt-Q 3; B-B 3,

313-K 2, Kt-Q 5; 4 Kt x R. Kt-B 7; 5 Kt-B 4 Kt x P x R.