MESON Chess Problem Database

Problem Display
PID: 245064 (1N2r3/3R4/KNp1k1P1/8/3n1P1B/1p1Q4/4q3/3bR1b1 w - - 0 1)

Eerkes, Allard Pieter

De Maasbode, 1950

1N2r3/3R4/KNp1k1P1/8/3n1P1B/1p1Q4/4q3/3bR1b1

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Qxe4#
    • 1...Qe5
      • 2.Rxe5#
    • 1...Sc2
      • 2.Rd6#
    • 1...Sf3
      • 2.Rd6#
    • 1...Sb5
      • 2.Qh3#
    • 1...Sf5
      • 2.Qc4#
  • Tries
    • 1.Rxe2+?
      • 1...Be3
        • 2.Rxe3#
        • 2.Qe4#
      • 1...Sxe2
        • 2.Rd6#
        • 2.Qe4#
        • 2.Qh3#
      • 1...Bxe2!
  • Keys
    • 1.Sa4!
      • threat
        • 2.Sc5#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Sc2
        • 2.Rd6#
      • 1...Sf3
        • 2.Rd6#
      • 1...Sb5
        • 2.Qh3#
      • 1...Sf5
        • 2.Qc4#
      • 1...c5
        • 2.Sxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(c);N_PINQ(B)::QAR2(B),XQ(c)
    • Q(c);N_PINQ(B),OGATE::R1(A),XQ(c)
    • S(e);::R1(H)
    • S(e);N_PINQ(B)::QAB(B)
    • S(e);SBLOCK::QAB(B)
  • Tries
    • Try
      • R(A);CHECK,N_SPINQ(B),XQ(c)
      • Refutation
        • B(a);P_PINQ(B),XR(A)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • Q(c);N_PINQ(B)::QAR2(B),XQ(c)
      • S(e);::R1(H)
      • S(e);N_PINQ(B)::QAB(B)
      • S(e);SBLOCK::QAB(B)
      • P(f);::S(F),XP(f)
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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).