MESON Chess Problem Database

Problem Display
PID: 48071 (K7/2p5/pk6/8/6Q1/B1N5/8/8 w - - 0 1)

Lincoln, Robert A

Still More Fun with Chess Miniatures, 2002

K7/2p5/pk6/8/6Q1/B1N5/8/8

#2

4 + 3

5454 Near Snap 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qb4#
    • 1...Kc6
      • 2.Qe6#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qc5#
      • 1...Kc6
        • 2.Qe6#
      • 1...a5
        • 2.Qb5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6!
    • 1.Qd7?
      • 1...Ka5
        • 2.Qxc7#
      • 1...a5
        • 2.Qb5#
      • 1...c6
        • 2.Qd8#
      • 1...c5!
    • 1.Qg1+?
      • 1...Ka5
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Kc6!
    • 1.Qa4?
      • threat
        • 2.Sd5#
      • 1...a5
        • 2.Qb5#
      • 1...c6!
    • 1.Qc4?
      • threat
        • 2.Qc5#
      • 1...Ka5
        • 2.Qb4#
        • 2.Qc5#
        • 2.Qxc7#
      • 1...c5
        • 2.Qxc5#
      • 1...a5
        • 2.Sa4#
        • 2.Sd5#
        • 2.Qb5#
      • 1...c6!
    • 1.Qd4+?
      • 1...Ka5
        • 2.Bb4#
        • 2.Qc5#
        • 2.Qb4#
      • 1...c5
        • 2.Qxc5#
      • 1...Kc6!
    • 1.Qg5?
      • threat
        • 2.Qc5#
      • 1...a5
        • 2.Qb5#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qd8#
      • 1...Kc6!
  • Keys
    • 1.Qc8!
      • 1...Ka5
        • 2.Qxc7#
      • 1...Kc6
        • 2.Qe6#
      • 1...a5
        • 2.Qb7#
      • 1...c5
        • 2.Qxc5#
      • 1...c6
        • 2.Qd8#

Anticipated by 158944(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAB1(C)
    • K(b);P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • K(b);P-FLIGHT::QAR2(C)
        • P(a);N_GUARD::QAR1(C)
        • P(c);::QAB1(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Vars
        • K(b);S_FLIGHT::QAB(C),XP(c)
        • P(a);N_GUARD::QAR1(C)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(C)
        • P(c);P_SPINP(c)::QAB1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • S(B)
      • Vars
        • P(a);N_GUARD::QAR1(C)
      • Refutation
        • P(c);
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(c);::QAB1(C),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(C),XP(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • QAB1(C)
      • Vars
        • P(a);N_GUARD::QAR1(C)
        • P(c);::QAB1(C),XP(c)
        • P(c);OGATEB,SBLOCK::QAB(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::QAB(C),XP(c)
      • K(b);P-FLIGHT,P_SPINP(c)::QAR2(C)
      • P(a);SBLOCK::QAR1(C)
      • P(c);OGATE::QAB1(C),XP(c)
      • P(c);OGATEB,SBLOCK::QAB(C)
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).