MESON Chess Problem Database

Problem Display
PID: 23050 (8/4K3/3N4/1Qpk1p2/8/2P5/8/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/4K3/3N4/1Qpk1p2/8/2P5/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Tries
    • 1.Qd3+?
      • 1...Ke5
        • 2.Qxf5#
      • 1...Kc6!
    • 1.Qa4?
      • 1...c4
        • 2.Qb5#
      • 1...f4
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sf7#
      • 1...Kc6!
    • 1.Qd7?
      • 1...Ke5
        • 2.Qxf5#
      • 1...c4
        • 2.Qb5#
      • 1...f4!
    • 1.Qb3+?
      • 1...Kc6
        • 2.Qb7#
      • 1...c4
        • 2.Qb5#
      • 1...Ke5!
  • Keys
    • 1.Qb1!
      • 1...Ke5
        • 2.Qxf5#
      • 1...Kc6
        • 2.Qb7#
      • 1...c4
        • 2.Qb5#
      • 1...f4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • P(a);OGATEB::QAR2(B)
        • P(c);N_GUARD::QAB1(B)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::S(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(b);P-FLIGHT::QAR1(B),XP(c)
        • P(a);OGATEB::QAR2(B)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(b);S_FLIGHT::QAB1(B)
        • P(a);OGATEB,P_SPINP(a)::QAR2(B)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(B);N_PINP(a)
    • Vars
      • K(b);P-FLIGHT::QAR1(B),XP(c)
      • K(b);S_FLIGHT::QAB1(B)
      • P(a);OGATEB::QAR2(B)
      • P(c);N_GUARD::QAB1(B)
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).