MESON Chess Problem Database

Problem Display
PID: 266025 (N7/1KPr4/Np1rpB2/3kp3/R2n3R/P7/2p1PQ1p/q5bb w - - 0 1)

Jordan, Gijsbertus

Probleemblad, 1950

N7/1KPr4/Np1rpB2/3kp3/R2n3R/P7/2p1PQ1p/q5bb

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7+
      • 2.S8xc7#
    • 1...Sxe2
      • 2.Sb4#
    • 1...Sb3
      • 2.Sb4#
    • 1...Sf3
      • 2.Sb4#
      • 2.e4#
    • 1...Sb5
      • 2.Sb4#
    • 1...Sf5
      • 2.Sb4#
    • 1...Sc6
      • 2.Sxb6#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qxe5#
      • 1...Rxc7+
        • 2.S8xc7#
      • 1...Sxe2
        • 2.Qc4#
      • 1...e4
        • 2.Qe5#
      • 1...Sb3
        • 2.Qc4#
      • 1...Sf3
        • 2.Qc4#
        • 2.Qe4#
        • 2.e4#
      • 1...Sb5
        • 2.Qc4#
      • 1...Sf5
        • 2.Qc4#
      • 1...Sc6
        • 2.Qc4#
      • 1...exf4!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qxe5#
      • 1...Rxc7+
        • 2.S8xc7#
      • 1...Sxe2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...Sf3
        • 2.e4#
      • 1...Sb5
        • 2.Qb3#
      • 1...Sf5
        • 2.Qb3#
      • 1...Sc6
        • 2.Qb3#
      • 1...e4
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(l);CHECK,XP(I)::S(J),XR(l)
    • S(f);XP(A)::S(F)
    • S(f);::S(F)
    • S(f);S_CUTR(j)::S(J),XP(i)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR1(B),XP(h)
      • Vars
        • R(l);CHECK,XP(I)::S(J),XR(l)
        • S(f);OGATE,XP(A)::QAB1(B)
        • P(h);::QAR1(B)
        • S(f);OGATE::QAB1(B)
      • Refutation
        • P(h);XQ(B)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(h)
    • Vars
      • R(l);CHECK,XP(I)::S(J),XR(l)
      • S(f);N_GUARD,XP(A)::QAB(B)
      • S(f);N_GUARD::QAB(B),XS(f)
      • S(f);S_CUTB(c)::P(A)
      • S(f);N_GUARD::QAB(B)
      • P(h);::QAR1(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).