MESON Chess Problem Database

Problem Display
PID: 51387 (7q/4pNN1/3pPkr1/1n1P2p1/8/3B4/1K4R1/4Q3 w - - 0 1)

Massingham, HW

Manchester Guardian, 1959

7q/4pNN1/3pPkr1/1n1P2p1/8/3B4/1K4R1/4Q3

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg7
      • 2.Rf2#
      • 2.Qf2#
      • 2.Qf1#
    • 1...Qh1
      • 2.Se8#
    • 1...Qh2
      • 2.Se8#
    • 1...Qh3
      • 2.Se8#
    • 1...Qh4
      • 2.Se8#
    • 1...Qh5
      • 2.Sxh5#
      • 2.Se8#
    • 1...Qh6
      • 2.Se8#
    • 1...Qh7
      • 2.Se8#
    • 1...Qa8
      • 2.Sh5#
    • 1...Qb8
      • 2.Sh5#
    • 1...Qc8
      • 2.Sh5#
    • 1...Qd8
      • 2.Sh5#
    • 1...Qe8
      • 2.Sh5#
      • 2.Sxe8#
    • 1...Qf8
      • 2.Sh5#
    • 1...Qg8
      • 2.Sh5#
    • 1...Rxg7
      • 2.Rf2#
      • 2.Qf2#
      • 2.Qf1#
    • 1...Sa3
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sa7
      • 2.Qc3#
    • 1...Sc7
      • 2.Qc3#
  • Tries
    • 1.Qc3+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sxc3!
  • Keys
    • 1.Qh4!
      • 1...Kxg7
        • 2.Qxh8#
      • 1...Qxg7
        • 2.Rf2#
        • 2.Qf2#
      • 1...Qxh4
        • 2.Se8#
      • 1...Rxg7
        • 2.Rf2#
        • 2.Qf2#
      • 1...gxh4
        • 2.Rxg6#
      • 1...Rh6
        • 2.Qxg5#
      • 1...Qh5
        • 2.Sxh5#
        • 2.Se8#
      • 1...Qh6
        • 2.Se8#
      • 1...Qh7
        • 2.Se8#
      • 1...Qa8
        • 2.Sh5#
      • 1...Qb8
        • 2.Sh5#
      • 1...Qc8
        • 2.Sh5#
      • 1...Qd8
        • 2.Sh5#
      • 1...Qe8
        • 2.Sh5#
        • 2.Sxe8#
      • 1...Qf8
        • 2.Sh5#
      • 1...Qg8
        • 2.Sh5#
      • 1...Sa3
        • 2.Qd4#
      • 1...Sc3
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa7
        • 2.Qd4#
      • 1...Sc7
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • Q(g);N_GUARD::S(H)
    • Q(g);N_GUARD,P_PINR(C)::S(H)
    • S(a);N_GUARD::QAB(A)
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);P_PINP(b)
    • Vars
      • K(d);N_SPINP(b),OGATEB,S_FLIGHT,XS(H)::QAB1(A),XQ(g)
      • Q(g);N_GUARD,N_SPINP(b),XQ(A)::S(H)
      • P(b);N_SPINP(b),OGATE,XQ(A)::R1(C),XR(e)
      • R(e);N_GUARD::QAB1(A),XP(b)
      • Q(g);N_GUARD::S(H)
      • S(a);N_GUARD::QAB(A)
      • S(a);N_GUARD::QAB(A),XS(a)
HTML5 logo

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).