MESON Chess Problem Database

Problem Display
PID: 175228 (2R5/2Q5/p1n1N3/1r1N4/1nk1B3/8/4PK2/1R6 w - - 0 1)

Clark, WA

San Francisco Chronicle, 1902

2R5/2Q5/p1n1N3/1r1N4/1nk1B3/8/4PK2/1R6

#2

8 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Rxb4#
    • 1...Sd3+
      • 2.exd3#
  • Tries
    • 1.Qxc6+?
      • 1...Rc5
        • 2.Rxb4#
        • 2.Qxc5#
      • 1...Sxc6!
  • Keys
    • 1.Qa5!
      • 1...Sd3+
        • 2.exd3#
      • 1...Rxa5
        • 2.Rxb4#
      • 1...Rxd5
        • 2.Qxb4#
      • 1...Sxd5
        • 2.Bd3#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Rb6
        • 2.Qc5#
      • 1...Rb7
        • 2.Qc5#
      • 1...Rb8
        • 2.Qc5#
      • 1...Sa2
        • 2.Se3#
      • 1...Sc2
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::R1(A),XS(a)
    • S(a);CHECK,OGATE::P(B),XS(a)
  • Tries
    • Try
      • Q(G);CHECK,XS(e)
      • Refutation
        • S(a);P_SPINS(a),XQ(G)
  • Actual
    • Q(G);
    • Vars
      • S(a);CHECK,OGATE::P(B),XS(a)
      • R(c);N_GUARD,XQ(G)::R1(A),XS(a)
      • R(c);N_GUARD,XS(E)::QAR1(G),XS(a)
      • S(a);N_GUARD,SBLOCK,XS(E)::B(D)
      • R(c);N_SPINS(e),OGATE::QAR1(G),XR(c)
      • R(c);OGATE::QAR1(G)
      • S(a);::S(E)
      • S(a);OGATE::QAR1(G)
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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).