MESON Chess Problem Database

Problem Display
PID: 132987 (8/8/3ppN2/p3k1P1/r4pK1/2P1N3/P6Q/8 w - - 0 1)

Massingham, HW

The Field, 1959

(First published on Thu Nov 12 1959)

8/8/3ppN2/p3k1P1/r4pK1/2P1N3/P6Q/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa2
      • 2.Sc4#
      • 2.Qxf4#
    • 1...Ra3
      • 2.Sc4#
      • 2.Qxf4#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Re4
      • 2.Sd7#
  • Tries
    • 1.Se4?
      • threat
        • 2.Qxf4#
      • 1...Rxe4
        • 2.Qh8#
      • 1...Kxe4!
    • 1.Qe2?
      • threat
        • 2.Sc4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...fxe3+!
  • Keys
    • 1.Qb2!
      • threat
        • 2.c4#
      • 1...Rxa2
        • 2.Sc4#
      • 1...d5
        • 2.Qb8#
      • 1...Rb4
        • 2.cxb4#
      • 1...Ra3
        • 2.Sc4#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Rd4
        • 2.cxd4#
      • 1...Re4
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::S(D),XR(a)
    • R(a);SBLOCK::S(G)
  • Tries
    • Try
      • S(G);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • R(a);SBLOCK,XS(G)::QAB(B)
      • Refutation
        • K(d);N_SPINP(b),P-FLIGHT,XS(G)
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • QAR(B)+S(D),DCHECK
      • Vars
        • R(a);::QAR(B)+S(D),DCHECK,XR(a)
      • Refutation
        • P(b);CHECK,P_SPINP(b),XS(D)
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • QAB(B)+P(C)
    • Vars
      • R(a);N_GUARD,XP(A)::S(D)
      • P(e);OGATEB::QAB(B)
      • R(a);OGATE::QAB(B)+P(C),XR(a)
      • R(a);N_GUARD::S(D)
      • R(a);N_GUARD::S(D),XR(a)
      • R(a);OGATE::P(C),XR(a)
      • R(a);SBLOCK::S(G)
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).