MESON Chess Problem Database

Problem Display
PID: 257896 (5Nn1/r2p2QK/5r2/1p4R1/1N1k4/3Pp3/b7/2R5 w - - 0 1)

Andrade, Barry Jack da Costa

British Chess Magazine, 1934

5Nn1/r2p2QK/5r2/1p4R1/1N1k4/3Pp3/b7/2R5

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Rd5#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Sh6
      • 2.Qxf6#
    • 1...Se7
      • 2.Qxf6#
    • 1...d5
      • 2.Se6#
    • 1...d6
      • 2.Qxa7#
  • Tries
    • 1.Se6+?
      • 1...dxe6
        • 2.Qxa7#
      • 1...Bxe6!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qg4#
      • 1...e2
        • 2.Qg1#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Sh6
        • 2.Qxf6#
      • 1...d5
        • 2.Se6#
      • 1...d6
        • 2.Qxa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD,P_PINP(B)::R1(D)
    • B(a);N_GUARD::R1(D),XB(a)
    • S(h);N_GUARD::QAB(E),XR(e)
    • P(g);N_GUARD,P_PINQ(E),S_CUTB(a)::S(G)
    • P(g);OGATE,P_PINQ(E)::QAB(E),XR(f)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • P(g);OGATE,P_PINQ(E),XS(G)::QAB(E),XR(f)
      • Refutation
        • B(a);XS(G)
  • Actual
    • R(D);
    • Threat
      • QAR(E)
    • Vars
      • P(b);OGATEB::QAB(E)
      • B(a);N_GUARD::R1(D),XB(a)
      • S(h);N_GUARD::QAB(E),XR(e)
      • P(g);N_GUARD,P_PINQ(E),S_CUTB(a)::S(G)
      • P(g);OGATE,P_PINQ(E)::QAB(E),XR(f)
HTML5 logo

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).