MESON Chess Problem Database

Problem Display
PID: 170897 (4n2B/1p2rP2/pK1pRp2/5P2/3kN1NR/1Q3P2/n1pPr3/6q1 w - - 0 1)

Prins, Hendrik

2nd HM., Problemisten, 1980-1981

4n2B/1p2rP2/pK1pRp2/5P2/3kN1NR/1Q3P2/n1pPr3/6q1

#2

11 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Bxf6#
    • 1...Sg7
      • 2.Rxd6#
  • Tries
    • 1.Sexf6?
      • threat
        • 2.Qd5#
      • 1...Rxd2
        • 2.Sxe8#
      • 1...Sxf6
        • 2.Rxd6#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Qb1
        • 2.Se3#
      • 1...Sb4
        • 2.Qc3#
      • 1...Sc7
        • 2.Se4#
      • 1...d5
        • 2.Qxd5#
      • 1...Re5!
  • Keys
    • 1.Sgxf6!
      • threat
        • 2.Qd5#
      • 1...Rxd2
        • 2.Sg3#
      • 1...Sxf6
        • 2.Bxf6#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Qb1
        • 2.Sxe8#
      • 1...Sb4
        • 2.Qc3#
      • 1...Sc7
        • 2.Sg4#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • S(k);N_GUARD::B(K),XP(h)
    • S(k);N_GUARD,N_SPINP(h)::R(I),XP(g)
  • Tries
    • Try
      • S(D);XP(h)
      • Threat
        • QAR1(B)
      • Vars
        • R(d);N_GUARD,XP(A)::B(K)+S(D),XS(k)
        • S(k);N_GUARD,P_SPINS(k),XS(D)::R(I),XP(g)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • Q(a);N_GUARD,P_PINQ(B)::R(F)+S(E)
        • S(b);N_GUARD::QAB1(B)
        • S(k);N_GUARD::B(K)+S(D)
        • P(g);::QAR1(B),XP(g)
      • Refutation
        • R(d);
  • Actual
    • S(E);XP(h)
    • Threat
      • QAR1(B)
    • Vars
      • R(d);N_GUARD,XP(A)::R(F)+S(D)
      • S(k);OGATE,P_SPINS(k),XS(E)::B(K),XS(k)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • Q(a);N_GUARD,P_PINQ(B)::B(K)+S(E),XS(k)
      • S(b);N_GUARD::QAB1(B)
      • S(k);N_GUARD::B(K)+S(E)
      • P(g);::QAR1(B),XP(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).