MESON Chess Problem Database

Problem Display
PID: 76821 (n7/K7/8/k7/P7/R7/n7/Q7 w - - 0 1)

Butwillo, Brother

The Tablet, 1946

(First published on Sat Aug 31 1946)

n7/K7/8/k7/P7/R7/n7/Q7

#2

4 + 3

15239 Valois Notebooks 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Qc3#
    • 1...Sc3
      • 2.Qxc3#
  • Tries
    • 1.Qb2?
      • threat
        • 2.Qb5#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc7
        • 2.Qb6#
      • 1...Sb4!
    • 1.Qc3+?
      • 1...Sb4
        • 2.Qc5#
      • 1...Sxc3!
    • 1.Qe1+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Qc5#
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sc7
        • 2.Qb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A)
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • S(a);N_GUARD::QAB(A),XS(a)
        • S(c);N_GUARD::QAB1(A)
      • Refutation
        • S(a);
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAR2(A)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • S(a);N_GUARD::QAB(A),XS(a)
      • S(c);N_GUARD::QAB1(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).