MESON Chess Problem Database

Problem Display
PID: 100863 (8/2n5/2KN2p1/8/2pk4/3p4/8/4QN2 w - - 0 1)

Brouwer, HH

Koetsheid, Petrus Albertus

3rd HM., Good Companions (May Meredith Ty.), 1917

8/2n5/2KN2p1/8/2pk4/3p4/8/4QN2

#2

4 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb5
      • 2.Sxb5#
    • 1...Sd5
      • 2.Sb5#
    • 1...Sa6
      • 2.Sb5#
    • 1...Se6
      • 2.Sb5#
    • 1...Sa8
      • 2.Sb5#
    • 1...Se8
      • 2.Sb5#
    • 1...d2
      • 2.Qe3#
    • 1...c3
      • 2.Qe3#
      • 2.Qe4#
    • 1...g5
      • 2.Sf5#
  • Tries
    • 1.Sg3?
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sd5
        • 2.Sb5#
      • 1...Sa6
        • 2.Sb5#
      • 1...Se6
        • 2.Sb5#
      • 1...Sa8
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...c3
        • 2.Qe4#
      • 1...g5
        • 2.Sgf5#
        • 2.Sdf5#
      • 1...d2!
    • 1.Qe7?
      • threat
        • 2.Qf6#
        • 2.Qg7#
      • 1...Se6
        • 2.Qf6#
      • 1...d2
        • 2.Qe3#
      • 1...Sd5
        • 2.Sb5#
      • 1...Se8
        • 2.Sb5#
      • 1...Kc3!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Qe5#
      • 1...d2
        • 2.Qe3#
      • 1...c3
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 7
  • Sets
    • S(e);N_GUARD::S(D),XS(e)
    • S(e);N_GUARD::S(D)
    • P(a);::QAB1(A)
    • P(d);N_GUARD::S(D)
  • Tries
    • Try
      • S(B);
      • Vars
        • S(e);N_GUARD::S(D),XS(e)
        • S(e);N_GUARD::S(D)
        • P(b);SBLOCK::QAR1(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(e);::QAB(A)
        • P(a);::QAB1(A)
        • S(e);N_GUARD::S(D)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB1(A)
    • Vars
      • P(a);::QAB1(A)
      • P(b);SBLOCK::QAR(A)
HTML5 logo

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).