MESON Chess Problem Database

Problem Display
PID: 148955 (4B3/8/4p3/3k4/2R5/2Pn2K1/3NQ3/8 w - - 0 1)

Stevenson, AL

British Chess Magazine, 1903

4B3/8/4p3/3k4/2R5/2Pn2K1/3NQ3/8

#2

6 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Sc5
      • 2.Rd4#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Qe4#
        • 2.Qxe6#
      • 1...Sf4
        • 2.Qb5#
        • 2.Qe4#
      • 1...Sf2
        • 2.Qb5#
        • 2.Qxe6#
      • 1...Se5
        • 2.Qb5#
        • 2.Qe4#
      • 1...e5
        • 2.Qxd3#
        • 2.Qe4#
      • 1...Sc5!
  • Keys
    • 1.Se4!
      • 1...Kxc4
        • 2.Qa2#
      • 1...Ke5
        • 2.Qh5#
      • 1...Sc1
        • 2.Rc5#
      • 1...Se1
        • 2.Rc5#
      • 1...Sb2
        • 2.Rc5#
      • 1...Sf2
        • 2.Rc5#
      • 1...Sb4
        • 2.Rc5#
      • 1...Sf4
        • 2.Rc5#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Se5
        • 2.Rd4#
        • 2.Rc5#
      • 1...e5
        • 2.Bf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::R1(E)
  • Tries
    • Try
      • R(E);
      • Threat
        • DUALS(2)
      • Refutation
        • S(a);
  • Actual
    • S(A);
    • Vars
      • K(b);OGATEB,P_SPINS(a),S_FLIGHT,XR(E)::QAB(B)
      • K(b);P-FLIGHT::QAR(B)
      • S(a);N_GUARD::R1(E)
      • S(a);N_GUARD::R1(E),XS(a)
      • P(c);OGATEB,SBLOCK::B(F)
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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).