MESON Chess Problem Database

Problem Display
PID: 51305 (6Q1/3p4/3Bp1K1/1PPk4/1pp5/1r2p1b1/1nN2N2/q7 w - - 0 1)

Lytton, Cedric C (was Sells, CCL)

Manchester Guardian, 1956

6Q1/3p4/3Bp1K1/1PPk4/1pp5/1r2p1b1/1nN2N2/q7

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qa8#
    • 1...Qc1
      • 2.Qa8#
    • 1...Qd1
      • 2.Qa8#
    • 1...Qe1
      • 2.Qa8#
    • 1...Qf1
      • 2.Qa8#
    • 1...Qg1
      • 2.Qa8#
    • 1...Qh1
      • 2.Qa8#
    • 1...Qa8
      • 2.Qxa8#
    • 1...Sa4
      • 2.Qa8#
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qd4#
      • 1...e5
        • 2.Qg8#
      • 1...Qd1
        • 2.Qa8#
      • 1...Rd3
        • 2.Sxb4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sd1
        • 2.Qh1#
      • 1...Sd3
        • 2.Sxe3#
      • 1...Sa4
        • 2.Qa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_GUARD,P_PINS(A)::QAB(G)
    • Q(a);N_GUARD::QAB(G)
    • Q(a);N_GUARD::QAB(G),XQ(a)
    • S(b);S_CUTQ(a)::QAB(G)
  • Actual
    • Q(G);N_PINP(i)
    • Threat
      • QAR1(G)
    • Vars
      • P(i);OGATEB::QAB(G)
      • Q(a);N_GUARD::QAB(G)
      • R(c);N_GUARD::S(A),XP(f)
      • B(e);N_GUARD::QAR1(G),XB(e)
      • S(b);S_CUTQ(a)::QAB(G)
      • S(b);S_CUTR(c)::S(A),XP(d)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).