MESON Chess Problem Database

Problem Display
PID: 179793 (nBB5/2n5/2NQ1pP1/K1N1q1b1/PRP2kp1/3p2R1/5P2/3r4 w - - 0 1)

Feenstra Kuiper, Pieter

4th HM., Volksgazet TT, 1953

nBB5/2n5/2NQ1pP1/K1N1q1b1/PRP2kp1/3p2R1/5P2/3r4

#2

12 + 9

102 Probleemblad 1979

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.cxb5#
    • 1...Sd5
      • 2.cxd5#
    • 1...Sa6
      • 2.Qd4#
    • 1...Se8
      • 2.Qd4#
    • 1...f5
      • 2.Qxe5#
  • Tries
    • 1.Qd4+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qxd4!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Rxg4#
      • 1...Qxd5
        • 2.cxd5#
      • 1...Sxd5
        • 2.cxd5#
      • 1...Se6
        • 2.Qe4#
      • 1...Qe2
        • 2.Qf5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qf5
        • 2.Qxf5#
      • 1...Qe6
        • 2.Sxe6#
      • 1...Rg1
        • 2.Sxd3#
      • 1...f5
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • S(h);N_PINS(G),OGATE::R(D)+P(E),XS(h)
    • S(h);::QAR2(I)
    • P(g);N_GUARD::QAB1(I),XQ(e)
  • Tries
    • Try
      • Q(I);CHECK,N_PINQ(e)
      • Vars
        • Q(e);N_GUARD,N_PINS(G),P_SPINQ(e),P_SPINS(h)::QAR1(I),XQ(e)
      • Refutation
        • Q(e);N_PINS(G),P_SPINS(h),XQ(I)
  • Actual
    • Q(I);N_PINQ(e),N_SPINS(G)
    • Threat
      • R1(B),XP(d)
    • Vars
      • Q(e);OGATE,P_PINS(G),P_SPINS(h),XQ(I)::R(D)+P(E),XQ(e)
      • S(h);OGATE,P_SPINQ(e),XQ(I)::R(D)+P(E),XS(h)
      • S(h);P_SPINQ(e)::QAR1(I)
      • Q(e);OGATE,P_SPINS(h)::QAR1(I)
      • Q(e);N_GUARD,P_SPINS(h)::QAR1(I),XQ(e)
      • Q(e);OGATE,P_SPINS(h)::QAR1(I),XQ(e)
      • Q(e);N_GUARD,P_SPINS(h)::S(G),XQ(e)
      • R(a);N_GUARD::S(G),XP(b)
      • P(g);N_GUARD::QAB1(I),XQ(e)
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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).