MESON Chess Problem Database

Problem Display
PID: 223218 (2r2B2/4R3/p1kp4/K1P2Q2/8/3P4/8/8 w - - 0 1)

Phelps, Francis Bradley

Nashville Daily American, 1886

2r2B2/4R3/p1kp4/K1P2Q2/8/3P4/8/8

#2

6 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qe6#
      • 2.Qd7#
    • 1...d5
      • 2.Qxc8#
  • Tries
    • 1.Qe4+?
      • 1...Kxc5
        • 2.Re5#
        • 2.Qc4#
      • 1...d5!
    • 1.Qd7+?
      • 1...Kd5
        • 2.Qxd6#
      • 1...Kxc5!
  • Keys
    • 1.Qf7!
      • 1...Kxc5
        • 2.Qc4#
      • 1...Rxf8
        • 2.Rc7#
      • 1...dxc5
        • 2.Qe6#
      • 1...Rc7
        • 2.Rxc7#
      • 1...Ra8
        • 2.Rc7#
      • 1...Rb8
        • 2.Rc7#
      • 1...Rd8
        • 2.Rc7#
      • 1...Re8
        • 2.Rc7#
      • 1...d5
        • 2.Re6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR2(D),XR(d)
  • Tries
    • Try
      • Q(D);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • Q(D);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(D),XP(c)
      • Refutation
        • K(b);P-FLIGHT,XP(C)
  • Actual
    • Q(D);
    • Vars
      • K(b);OGATEB,P-FLIGHT,XP(C)::QAR1(D)
      • R(d);N_GUARD,XB(F)::R1(E)
      • P(c);OGATEB,SBLOCK,XP(C)::QAR2(D)
      • R(d);N_GUARD::R1(E),XR(d)
      • R(d);N_GUARD::R1(E)
      • P(c);OGATEB,SBLOCK::R(E)
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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).