MESON Chess Problem Database

Problem Display
PID: 273139 (3NR3/1b3N2/8/p4r1R/1P1k2q1/1Q3n2/K2p1P2/8 w - - 0 1)

Eerkes, Allard Pieter

Probleemblad, 1952

3NR3/1b3N2/8/p4r1R/1P1k2q1/1Q3n2/K2p1P2/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Se6#
    • 1...Ba6
      • 2.Sc6#
    • 1...Bc6
      • 2.Sxc6#
    • 1...Bc8
      • 2.Sc6#
  • Tries
    • 1.Qc3+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kxc3!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kc4!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qc4#
      • 1...Qg8
        • 2.Sxf5#
      • 1...Rc5
        • 2.Qe3#
      • 1...Bd5
        • 2.Sb5#
      • 1...Ba6
        • 2.Sc6#
      • 1...Se5
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • B(g);SBLOCK::S(G)
    • B(g);N_GUARD::S(G)
    • B(g);N_GUARD::S(G),XB(g)
  • Tries
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);N_GUARD,P-FLIGHT,P_SPINR(f)::QAR1(C)
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT,P_SPINR(f)::QAR1(C)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(F);
    • Threat
      • QAR1(C)
    • Vars
      • Q(d);N_GUARD,P_PINQ(C)::S(F),XR(f)
      • R(f);::QAB1(C)
      • B(g);P_PINQ(C),S_CUTR(f)::S(F)
      • B(g);N_GUARD::S(G)
      • S(b);SBLOCK::S(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).