MESON Chess Problem Database

Problem Display
PID: 33032 (4nN1r/1Q1R3p/Rn3k2/5P2/3P2PK/4r2p/b7/8 w - - 0 1)

Nanning, Frederik Willem

De Problemist, 1929

4nN1r/1Q1R3p/Rn3k2/5P2/3P2PK/4r2p/b7/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Rf7#
    • 1...Re6
      • 2.Rf7#
    • 1...Rg8
      • 2.Sxh7#
    • 1...Bb1
      • 2.Rf7#
    • 1...Bf7
      • 2.Rxf7#
  • Tries
    • 1.Rxb6+?
      • 1...Re6
        • 2.Rf7#
      • 1...Be6
        • 2.Rf7#
      • 1...Sd6!
    • 1.Qxb6+?
      • 1...Re6
        • 2.Qd8#
      • 1...Be6
        • 2.Qd8#
      • 1...Sd6!
  • Keys
    • 1.Rxh7!
      • threat
        • 2.Sd7#
      • 1...Rxh7+
        • 2.Sxh7#
      • 1...Rxf8
        • 2.Rh6#
      • 1...Re6
        • 2.Qf7#
      • 1...Re7
        • 2.Qxe7#
      • 1...Be6
        • 2.Qe7#
      • 1...Bf7
        • 2.Qxf7#
      • 1...Sd6
        • 2.Qg7#
      • 1...Sg7
        • 2.Qxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • R(b);S_CUTB(a)::R1(G)
    • R(b);N_SPINS(d),S_CUTB(a)::R1(G)
    • R(h);N_GUARD::S(H),XP(f)
    • B(a);N_GUARD::R1(G)
    • B(a);N_GUARD::R1(G),XB(a)
  • Tries
    • Try
      • R(E);CHECK,XS(d)
      • Vars
        • R(b);P_SPINR(b)::R1(G)
        • B(a);P_SPINB(a)::R1(G)
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(F);CHECK,XS(d)
      • Vars
        • R(b);P_SPINR(b)::QAB(F)
        • B(a);P_SPINB(a)::QAB(F)
      • Refutation
        • S(g);P_SPINS(g)
  • Actual
    • R(G);P_SPINR(G),XP(f)
    • Threat
      • S(H)
    • Vars
      • R(h);CHECK,XR(G)::S(H),XR(h)
      • R(h);N_GUARD,N_PINR(G),XS(H)::R(G)
      • R(b);N_SPINS(d),S_CUTB(a)::QAR1(F)
      • R(b);N_GUARD::QAB1(F),XR(b)
      • B(a);N_SPINS(d),S_CUTR(b)::QAB1(F)
      • B(a);N_GUARD::QAR1(F),XB(a)
      • S(g);N_GUARD,N_SPINS(d)::QAB1(F)
      • S(g);N_GUARD::QAB1(F),XS(g)
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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).