MESON Chess Problem Database

Problem Display
PID: 75863 (6K1/8/8/B7/6N1/2Q5/4k1p1/6q1 w - - 0 1)

Lincoln, Robert A

Magadanskaya Pravda, 2005

6K1/8/8/B7/6N1/2Q5/4k1p1/6q1

#2

4 + 3

136 Problem Observer 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Qd2#
    • 1...Kf1
      • 2.Qe1#
      • 2.Qd3#
      • 2.Qc4#
  • Tries
    • 1.Qd2+?
      • 1...Kf1
        • 2.Qe1#
        • 2.Qd1#
        • 2.Qd3#
      • 1...Kf3!
    • 1.Qc2+?
      • 1...Kf1
        • 2.Qd1#
        • 2.Qd3#
        • 2.Qc4#
      • 1...Kf3!
    • 1.Qe3+?
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1
        • 2.Qe1#
        • 2.Qd3#
      • 1...Qxe3!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qf3#
      • 1...Kd1
        • 2.Qd2#
      • 1...Kf1
        • 2.Qe1#
      • 1...Kf2
        • 2.Qf3#
      • 1...Qf2
        • 2.Qd3#
      • 1...Qe3
        • 2.Qe1#
      • 1...Qf1
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • Q(a);XQ(A)
  • Actual
    • S(B);
    • Threat
      • QAB1(A)
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P-FLIGHT::QAR1(A)
      • Q(a);SBLOCK::QAB1(A)
      • Q(a);N_GUARD,SBLOCK::QAR1(A)
      • Q(a);SBLOCK::QAR1(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).