MESON Chess Problem Database

Problem Display
PID: 43673 (5b2/5p2/B1KQ4/2nN1p2/3k1N2/R6R/r6B/4r2b w - - 0 1)

Easter, Norris

The Problemist, 1928

5b2/5p2/B1KQ4/2nN1p2/3k1N2/R6R/r6B/4r2b

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Sc3#
      • 2.Sf6#
    • 1...Re4
      • 2.Se7#
    • 1...Be4
      • 2.Qf6#
    • 1...Bxd5+
      • 2.Qxd5#
    • 1...Se4
      • 2.Rad3#
      • 2.Rhd3#
  • Tries
    • 1.Rad3+?
      • 1...Ke4
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sxd3!
    • 1.Rhd3+?
      • 1...Ke4
        • 2.Sc3#
        • 2.Sf6#
      • 1...Sxd3!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Sc3#
      • 1...Re5!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Se2#
        • 2.Se6#
      • 1...Bxd5+
        • 2.Qxd5#
      • 1...Ke4
        • 2.Sf6#
      • 1...Ree2
        • 2.Sxe2#
        • 2.Se6#
      • 1...Re4
        • 2.Se7#
      • 1...Re6
        • 2.Se2#
        • 2.Sxe6#
      • 1...Rae2
        • 2.Sxe2#
        • 2.Se6#
      • 1...Be4
        • 2.Qf6#
      • 1...Se4
        • 2.Rd3#
      • 1...Se6
        • 2.Se2#
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(a);N_PINS(E),SBLOCK::QAR(H)+S(E)
    • B(b);SBLOCK,S_CUTR(a)::QAB(H)
    • B(b);CHECK,OGATE,P_SPINB(b),XS(E)::QAR1(H),XB(b)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • S(e);XR(B)
    • Try
      • R(C);CHECK
      • Refutation
        • S(e);XR(C)
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);N_PINS(E),P-FLIGHT::S(E)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • R(C);
    • Threat
      • DUALS(2)
    • Vars
      • B(b);CHECK,OGATE,P_SPINB(b),XS(E)::QAR1(H),XB(b)
      • K(d);N_PINS(E),P-FLIGHT::S(E)
      • R(a);N_PINS(E),SBLOCK::QAR(H)+S(E)
      • B(b);SBLOCK,S_CUTR(a)::QAB(H)
      • S(e);N_GUARD,N_PINS(E),SBLOCK::R1(B)
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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).