MESON Chess Problem Database

Problem Display
PID: 17196 (4K3/8/3Q4/p2pP1p1/r2k2r1/3N4/3PP3/8 w - - 0 1)

Nield, Joshua

Hull Times, 1925

4K3/8/3Q4/p2pP1p1/r2k2r1/3N4/3PP3/8

#2

6 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qc5#
  • Tries
    • 1.Qb6+?
      • 1...Kc4
        • 2.Sb2#
      • 1...Ke4!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qxa4#
        • 2.Qxg4#
      • 1...Kc4
        • 2.Qxa4#
      • 1...Ke4
        • 2.Qxg4#
      • 1...Ra1
        • 2.Qxg4#
      • 1...Ra2
        • 2.Qxg4#
      • 1...Ra3
        • 2.Qxg4#
      • 1...Rb4
        • 2.Qxg4#
      • 1...Rc4
        • 2.Qxg4#
      • 1...Rg1
        • 2.Qxa4#
      • 1...Rg2
        • 2.Qxa4#
      • 1...Rg3
        • 2.Qxa4#
      • 1...Re4
        • 2.Qxa4#
      • 1...Rf4
        • 2.Qxa4#
      • 1...Rh4
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(c);P_PINP(D),SBLOCK::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK,N_PINP(e)
      • Vars
        • K(b);P-FLIGHT::S(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • DUALS(2)
    • Vars
      • K(b);N_SPINP(e),P-FLIGHT::QAR2(E),XR(a)
      • K(b);N_SPINP(e),P-FLIGHT::QAR2(E),XR(c)
      • R(a);::QAR(E),XR(c)
      • R(a);SBLOCK::QAR(E),XR(c)
      • R(c);::QAR(E),XR(a)
      • R(c);P_PINP(D),SBLOCK::QAR(E),XR(a)
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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).