MESON Chess Problem Database

Problem Display
PID: 194315 (1b1k2n1/2R1p3/Kp6/1B3pq1/4p2B/8/7Q/8 w - - 0 1)

Coello Alonso, Jose Antonio

BCPS Website, 2019

1b1k2n1/2R1p3/Kp6/1B3pq1/4p2B/8/7Q/8

#2

5 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Qd6#
    • 1...Qe3
      • 2.Qd6#
    • 1...Qg1
      • 2.Qd6#
    • 1...Qg2
      • 2.Qd6#
    • 1...Qg4
      • 2.Qd6#
    • 1...Qh5
      • 2.Qd6#
    • 1...Qg7
      • 2.Qd6#
    • 1...e6
      • 2.Qd6#
  • Tries
    • 1.Qd2+?
      • 1...Kxc7
        • 2.Qd7#
      • 1...Qxd2!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Rc8#
      • 1...Bxc7
        • 2.Qxc7#
      • 1...Qc1
        • 2.Qd6#
      • 1...e5
        • 2.Qd2#
      • 1...e6
        • 2.Qd6#
        • 2.Qd2#

This is a version of 194314

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(c);P_SPINP(e)::QAR2(A)
    • P(e);N_GUARD,P_SPINQ(c)::QAR2(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(g);S_FLIGHT,XR(E)::QAR1(A)
      • Refutation
        • Q(c);P_SPINP(e),XQ(A)
  • Actual
    • K(D);S_FLIGHT
    • Threat
      • R1(E)
    • Vars
      • B(f);OGATE,XR(E)::QAB1(A),XB(f)
      • Q(c);P_SPINP(e)::QAR2(A)
      • P(e);P_SPINQ(c)::QAR(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).