MESON Chess Problem Database

Problem Display
PID: 153207 (1B6/2pk1K2/8/1R1n4/3Q4/8/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

1B6/2pk1K2/8/1R1n4/3Q4/8/8/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxd5#
    • 1...Kd6
      • 2.Qxd5#
  • Tries
    • 1.Qg4+?
      • 1...Kd6
        • 2.Qe6#
      • 1...Kd8
        • 2.Rxd5#
      • 1...Kc6!
  • Keys
    • 1.Qe5!
      • 1...Kc6
        • 2.Qxd5#
      • 1...Kc8
        • 2.Qe8#
      • 1...Kd8
        • 2.Qe8#
      • 1...Sc3
        • 2.Qxc7#
      • 1...Se3
        • 2.Qxc7#
      • 1...Sb4
        • 2.Qxc7#
      • 1...Sf4
        • 2.Qxc7#
      • 1...Sb6
        • 2.Qxc7#
      • 1...Sf6
        • 2.Qxc7#
      • 1...Se7
        • 2.Qxc7#
      • 1...c5
        • 2.Qe8#
      • 1...c6
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 1
  • Sets
    • K(c);N_SPINS(a),S_FLIGHT::QAB1(A),XS(a)
    • K(c);P-FLIGHT,P_SPINP(b)::QAR1(A),XS(a)
  • Tries
    • Try
      • Q(A);CHECK,N_PINS(a)
      • Vars
        • K(c);P-FLIGHT,P_SPINP(b)::QAR1(A)
        • K(c);P-FLIGHT::R(B),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);N_PINS(a)
    • Vars
      • K(c);S_FLIGHT::QAB1(A),XS(a)
      • K(c);S_FLIGHT::QAR2(A)
      • K(c);P-FLIGHT::QAR1(A)
      • S(a);N_GUARD::QAR1(A),XP(b)
      • P(b);::QAB1(A)
      • P(b);SBLOCK::QAB1(A)
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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).