MESON Chess Problem Database

Problem Display
PID: 38284 (2Rn1K2/6N1/q1n2Q2/pP1NP1r1/1P1krppB/3p4/B2P3b/8 w - - 0 1)

Nietvelt, Gustaaf Josephus

De Problemist, 1928

2Rn1K2/6N1/q1n2Q2/pP1NP1r1/1P1krppB/3p4/B2P3b/8

#2

11 + 11

3979 Systematic Terminology 1984
5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Sf5#
    • 1...Rf5
      • 2.Sxf5#
    • 1...Rg6
      • 2.Sf5#
    • 1...Se6+
      • 2.Sxe6#
    • 1...Sb7
      • 2.Se6#
    • 1...Sf7
      • 2.Se6#
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qd6#
      • 1...Se6+
        • 2.Sxe6#
      • 1...Qxb5
        • 2.Sxb5#
      • 1...Rexe5
        • 2.Bf2#
      • 1...Rgxe5
        • 2.Sf5#
      • 1...Sxb4
        • 2.Rc4#
      • 1...Sxe5
        • 2.Rc4#
      • 1...Rf5
        • 2.Sxf5#
      • 1...Rg6
        • 2.Sf5#
      • 1...Sa7
        • 2.Rc4#
      • 1...Se7
        • 2.Rc4#
      • 1...Sb8
        • 2.Rc4#
      • 1...Sb7
        • 2.Se6#
      • 1...Sf7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • R(h);N_GUARD,P_SPINR(h),XP(G)::S(I)
    • R(h);N_GUARD,P_PINQ(H)::S(I),XR(h)
    • R(h);N_GUARD::S(I)
    • S(k);CHECK,N_GUARD::S(I),XS(k)
    • S(k);N_GUARD::S(I)
  • Actual
    • S(F);
    • Threat
      • QAR2(H)
    • Vars
      • S(k);CHECK,N_GUARD::S(I),XS(k)
      • Q(i);XP(E)::S(F),XQ(i)
      • R(d);N_GUARD,P_SPINR(d),XP(G)::B(D)
      • R(h);N_GUARD,P_SPINR(h),XP(G)::S(I)
      • S(j);OGATE,XP(C)::R1(J)
      • S(j);OGATE,P_SPINS(j),XP(G)::R1(J)
      • R(h);N_GUARD,P_PINQ(H)::S(I),XR(h)
      • R(h);N_GUARD::S(I)
      • S(j);OGATE::R1(J)
      • S(k);N_GUARD::S(I)
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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).