MESON Chess Problem Database

Problem Display
PID: 245066 (2R1bbK1/pp1k1n1Q/2R3Pp/3N3n/4N1rr/7B/8/8 w - - 0 1)

Eerkes, Allard Pieter

De Maasbode, 1951

2R1bbK1/pp1k1n1Q/2R3Pp/3N3n/4N1rr/7B/8/8

#2

8 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Sxc5#
    • 1...Bg7
      • 2.Sc5#
    • 1...Sg3
      • 2.Sef6#
    • 1...Sf4
      • 2.Sef6#
    • 1...Sf6+
      • 2.Sexf6#
    • 1...Sg7
      • 2.Sef6#
  • Tries
    • 1.Sdf6+?
      • 1...Ke7
        • 2.Rxe8#
      • 1...Sxf6+!
    • 1.Qxf7+?
      • 1...Be7
        • 2.Sc5#
        • 2.R6c7#
        • 2.Qe6#
        • 2.Qxe8#
        • 2.Qf5#
        • 2.Qxe7#
      • 1...Bxf7+!
  • Keys
    • 1.g7!
      • threat
        • 2.Qf5#
      • 1...Sf6+
        • 2.Sexf6#
      • 1...Sxg7
        • 2.Sef6#
      • 1...Sd6
        • 2.Sc5#
      • 1...Sg3
        • 2.Sef6#
      • 1...Sf4
        • 2.Sef6#
      • 1...Sg5
        • 2.gxf8S#
      • 1...Sd8
        • 2.R8c7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(j);N_GUARD::S(B),XB(j)
    • B(j);N_GUARD,N_PINP(E),N_SPINS(h)::S(B)
    • S(c);N_GUARD::S(B)
    • S(c);CHECK,N_GUARD::S(B),XS(c)
    • S(c);N_GUARD,N_PINP(E),N_SPINS(h)::S(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(g);N_SPINR(a),P-FLIGHT::R1(G),XB(i)
      • Refutation
        • S(c);CHECK,XS(C)
    • Try
      • Q(F);CHECK,XS(h)
      • Refutation
        • B(i);CHECK,XQ(F)
  • Actual
    • P(E);N_PINS(h)
    • Threat
      • QAB(F)
    • Vars
      • S(c);CHECK,N_GUARD::S(B),XS(c)
      • S(c);N_GUARD,XP(E)::S(B)
      • S(h);S_CUTB(j)::S(B)
      • S(c);N_GUARD::S(B)
      • S(h);N_PINP(E)::PXB(j)=S
      • S(h);SBLOCK::R1(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).