MESON Chess Problem Database

Problem Display
PID: 244455 (1B6/rNnKp3/4Nb2/1R3n1R/3pkpb1/3p4/5PP1/1B4Q1 w - - 0 1)

Eerkes, Allard Pieter

Magyar Sakkvilag, 1938

1B6/rNnKp3/4Nb2/1R3n1R/3pkpb1/3p4/5PP1/1B4Q1

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bh3
      • 2.f3#
    • 1...Be5
      • 2.Sg5#
    • 1...Bg5
      • 2.Sxg5#
    • 1...Bg7
      • 2.Sg5#
    • 1...Bh8
      • 2.Sg5#
    • 1...Se3
      • 2.Sc5#
    • 1...Sg3
      • 2.Sc5#
    • 1...Sh4
      • 2.Sc5#
    • 1...Sd6
      • 2.Sc5#
    • 1...Sh6
      • 2.Sc5#
    • 1...Sg7
      • 2.Sc5#
    • 1...Sd5
      • 2.Sc5#
  • Tries
    • 1.Qe1+?
      • 1...Se3
        • 2.Sc5#
      • 1...Be2!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qxf4#
      • 1...Sxb5
        • 2.Qc6#
      • 1...Sxe6
        • 2.Qc6#
      • 1...Be5
        • 2.Sg5#
      • 1...Bg5
        • 2.Sxg5#
      • 1...Se3
        • 2.Sc5#
      • 1...Sd5
        • 2.Sc5#
      • 1...f3
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 8
  • Sets
    • B(e);N_GUARD::P(C)
    • B(g);N_GUARD::S(G)
    • B(g);N_GUARD::S(G),XB(g)
    • S(f);P_PINS(G)::S(H)
    • S(i);P_PINS(H),SBLOCK::S(G)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(f);P_PINS(G),P_SPINS(f)::S(H)
      • Refutation
        • B(e);P_SPINB(e)
  • Actual
    • Q(B);
    • Threat
      • QAR1(B),XP(d)
    • Vars
      • S(i);N_GUARD,P_PINS(H),XR(E)::QAB(B)
      • S(i);N_GUARD,P_PINS(H),XS(G)::QAB(B)
      • B(g);N_GUARD::S(G)
      • B(g);N_GUARD::S(G),XB(g)
      • S(f);P_PINS(G)::S(H)
      • S(i);P_PINS(H),SBLOCK::S(G)
      • P(d);::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).