MESON Chess Problem Database

Problem Display
PID: 224685 (4K1R1/7b/3pk3/B2n1p2/2Q2pNr/p2p2pq/np5p/R1r1b3 w - - 0 1)

Towne, PA

The Sunny South, 1887

(First published on Sat Aug 27 1887)

4K1R1/7b/3pk3/B2n1p2/2Q2pNr/p2p2pq/np5p/R1r1b3

#2

6 + 16

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Qc8#
    • 1...Rb1
      • 2.Qc8#
    • 1...Rd1
      • 2.Qc8#
    • 1...Rc3
      • 2.Rxe1#
    • 1...Bc3
      • 2.Qc8#
    • 1...Bg6+
      • 2.Rxg6#
    • 1...Sc3
      • 2.Qc8#
  • Keys
    • 1.Bc3!
      • threat
        • 2.Qc8#
      • 1...Bg6+
        • 2.Rxg6#
      • 1...Rxc3
        • 2.Rxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD,XR(A)::QAB(B)
    • R(a);N_GUARD::QAB(B)
    • R(a);OGATE::R(A),XB(b)
    • B(b);S_CUTR(a)::QAB(B)
    • B(p);CHECK,N_GUARD::R(F),XB(p)
    • S(c);S_CUTR(a)::QAB(B)
  • Actual
    • B(D);
    • Threat
      • QAB(B)
    • Vars
      • B(p);CHECK,N_GUARD::R(F),XB(p)
      • R(a);OGATE,XB(D)::R(A),XB(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).