MESON Chess Problem Database

Problem Display
PID: 272417 (2Q3R1/1N1qrn2/1B2kr1p/3p1p1K/8/5N2/4B3/8 w - - 0 1)

Hawes, Frederick Thomas

Ravenscroft, Frank

The Problemist, 1957

2Q3R1/1N1qrn2/1B2kr1p/3p1p1K/8/5N2/4B3/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Rxg6#
    • 1...Re8
      • 2.Rxe8#
    • 1...Sd6
      • 2.Sd8#
    • 1...d4
      • 2.Bc4#
  • Tries
    • 1.Sd8+?
      • 1...Kd6
        • 2.Bc5#
        • 2.Qc5#
      • 1...Sxd8!
  • Keys
    • 1.Bc7!
      • threat
        • 2.Sd4#
        • 2.Sc5#
      • 1...Qxc8
        • 2.Sc5#
      • 1...Rg6
        • 2.Rxg6#
      • 1...Re8
        • 2.Rxe8#
      • 1...Se5
        • 2.Sd8#
      • 1...Sg5
        • 2.Sd8#
      • 1...Sd6
        • 2.Sd8#
      • 1...Sd8
        • 2.Sxd8#
      • 1...Sh8
        • 2.Sd8#
      • 1...d4
        • 2.Bc4#
      • 1...f4
        • 2.Sd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(d);OGATEB::R(G),XR(d)
    • R(g);OGATEB::R(G),XR(g)
    • S(h);N_GUARD,SBLOCK::S(E)
    • P(a);OGATEB::B(A)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • S(h);XS(E)
  • Actual
    • B(D);
    • Threat
      • DUALS(2)
    • Vars
      • Q(f);N_SPINQ(f),XQ(F)::S(E)
      • R(d);OGATEB::R(G),XR(d)
      • R(g);OGATEB::R(G),XR(g)
      • S(h);N_GUARD::S(E)
      • S(h);N_GUARD::S(E),XS(h)
      • P(a);OGATEB::B(A)
      • P(b);::S(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).