MESON Chess Problem Database

Problem Display
PID: 202260 (8/8/7B/K3p1rN/2Q5/3pk2n/1R5N/7b w - - 0 1)

Koetsheid, Petrus Albertus

2nd Prize, Good Companions, 1923

8/8/7B/K3p1rN/2Q5/3pk2n/1R5N/7b

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sf1#
    • 1...Be4
      • 2.Qc5#
    • 1...Sg1
      • 2.Bxg5#
    • 1...Sf2
      • 2.Bxg5#
    • 1...e4+
      • 2.Qc5#
  • Keys
    • 1.Sf6!
      • threat
        • 2.Sfg4#
      • 1...e4+
        • 2.Sd5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Bf3
        • 2.Sf1#
      • 1...Sf2
        • 2.Bxg5#
      • 1...Sf4
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::S(B)
    • B(a);SBLOCK::QAB(C)
    • S(d);N_GUARD::B(F),XR(f)
    • P(e);CHECK,SBLOCK::QAB(C)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • P(e);CHECK,S_CUTB(a)::S(E)
      • B(a);N_GUARD::QAR1(C),XB(a)
      • B(a);SBLOCK::S(B)
      • S(d);N_GUARD::B(F),XR(f)
      • S(d);N_SPINR(f),SBLOCK::QAB(C)
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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).