MESON Chess Problem Database

Problem Display
PID: 218455 (8/8/4N1P1/1P1k2pQ/4p2R/8/2K2n1B/4R3 w - - 0 1)

Bailey, EL

Philadelphia Times, 1881

8/8/4N1P1/1P1k2pQ/4p2R/8/2K2n1B/4R3

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rhxe4?
      • threat
        • 2.Rd4#
        • 2.Qxg5#
      • 1...Sd3
        • 2.Rd4#
      • 1...Sh3
        • 2.Rd4#
        • 2.Qd1#
      • 1...Sg4
        • 2.Rd4#
      • 1...Sxe4!
    • 1.Qxg5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxe6!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qb3#
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxe6
        • 2.Qf7#
      • 1...exf3
        • 2.Rd4#
      • 1...Sd3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::R1(D)
      • Refutation
        • S(a);XR(D)
    • Try
      • Q(F);CHECK,XP(d)
      • Vars
        • K(c);OGATE,P_SPINP(b),S_FLIGHT::QAR1(F)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT,XS(G)
  • Actual
    • Q(F);N_PINP(d),P_PINP(b)
    • Threat
      • QAB(F)
    • Vars
      • K(c);S_FLIGHT::QAB1(F)
      • K(c);OGATEB,S_FLIGHT,XS(G)::QAB1(F)
      • P(b);N_SPINP(b),OGATE,XQ(F)::R1(D)
      • S(a);N_GUARD::QAB1(F),XP(b)
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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).