MESON Chess Problem Database

Problem Display
PID: 6795 (1B6/1RnB1Q1K/1n4R1/1Pk1N3/2p5/2P5/3r3p/3r3b w - - 0 1)

Byas, Walter

Social Chess Quarterly (The), 1933

1B6/1RnB1Q1K/1n4R1/1Pk1N3/2p5/2P5/3r3p/3r3b

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rg2
      • 2.Rxc7#
    • 1...Rd5
      • 2.Rxc7#
    • 1...Bd5
      • 2.Qe7#
      • 2.Qf8#
    • 1...Sa4
      • 2.Qxc4#
    • 1...Sbd5
      • 2.Rc6#
    • 1...Sxd7
      • 2.Qxc4#
    • 1...Sba8
      • 2.Qxc4#
    • 1...Sc8
      • 2.Qxc4#
    • 1...Scd5
      • 2.Bd6#
  • Tries
    • 1.Qe7+?
      • 1...Kd5
        • 2.Bc6#
      • 1...Rd6!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Sd3#
      • 1...Rxd7+
        • 2.Sxd7#
      • 1...Kd5
        • 2.Sd3#
        • 2.Sf3#
        • 2.Sg4#
        • 2.Sc6#
        • 2.Sf7#
      • 1...Rd3
        • 2.Sxd3#
      • 1...Rd5
        • 2.Rxc7#
      • 1...Bd5
        • 2.Qf8#
      • 1...Sbd5
        • 2.Rc6#
      • 1...Scd5
        • 2.Bd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);S_CUTB(b)::R(E),XS(h)
    • S(g);N_GUARD::QAR1(G),XP(e)
    • S(g);S_CUTB(b)::R1(D)
    • S(g);N_GUARD,XB(F)::QAR1(G),XP(e)
    • S(h);OGATE::B(I)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(f);P-FLIGHT::B(F)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • Q(G);
    • Threat
      • QAR(G)+S(C),DCHECK
    • Vars
      • R(c);CHECK,XB(F)::QAR(G)+S(C),DCHECK,XR(c)
      • R(c);::QAR(G)+S(C),DCHECK,XR(c)
      • R(c);SBLOCK,S_CUTB(b)::R(E),XS(h)
      • B(b);SBLOCK,S_CUTR(c)::QAB(G)
      • S(g);SBLOCK,S_CUTB(b)::R1(D)
      • S(h);OGATE,SBLOCK::B(I)
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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).