MESON Chess Problem Database

Problem Display
PID: 21853 (8/2pB4/4r1p1/2pk2P1/6QK/5P2/7B/8 w - - 0 1)

Nield, Joshua

Hull Times, 1921

8/2pB4/4r1p1/2pk2P1/6QK/5P2/7B/8

#2

6 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
    • 1...Ra6
      • 2.Qe4#
    • 1...Rb6
      • 2.Qe4#
    • 1...Rc6
      • 2.Qe4#
    • 1...Rd6
      • 2.Qe4#
    • 1...Rf6
      • 2.Qe4#
    • 1...c6
      • 2.Bxe6#
  • Tries
    • 1.Bc6+?
      • 1...Rxc6
        • 2.Qe4#
      • 1...Kxc6!
  • Keys
    • 1.Bb5!
      • threat
        • 2.Qc4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re5
        • 2.Qd7#
      • 1...c4
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD,P_PINQ(C)::QAB1(C),XR(c)
    • R(c);N_GUARD::QAB1(C)
    • P(e);SBLOCK::B(F),XR(c)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • R(c);SBLOCK,XB(F)::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT,XB(F)
  • Actual
    • B(F);
    • Threat
      • QAB1(C)
    • Vars
      • R(c);N_GUARD,P_PINQ(C)::QAB1(C),XR(c)
      • R(c);OGATE::QAR2(C)
      • P(a);::QAB1(C),XP(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).