MESON Chess Problem Database

Problem Display
PID: 706 (KB2R1Nq/7b/N1p2b1n/2rk1n1Q/R3pp2/1p5B/8/8 w - - 0 1)

Gray, Robert

2nd HM., British Chess Magazine, 1938

KB2R1Nq/7b/N1p2b1n/2rk1n1Q/R3pp2/1p5B/8/8

#2

8 + 11

102 Probleemblad 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qf7#
    • 1...Sf7
      • 2.Qxf7#
    • 1...Sxg8
      • 2.Qf7#
    • 1...e3
      • 2.Qf3#
  • Tries
    • 1.Se7+?
      • 1...Ke6
        • 2.Sxc5#
      • 1...Bxe7!
    • 1.Rd8+?
      • 1...Ke6
        • 2.Sxc5#
      • 1...Bxd8!
    • 1.Qd1+?
      • 1...Sd4
        • 2.Be6#
      • 1...Bd4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxe4#
      • 1...Rc4
        • 2.Qxc4#
      • 1...Se3
        • 2.Be6#
      • 1...Sg3
        • 2.Be6#
      • 1...Sd4
        • 2.Sb4#
      • 1...Sh4
        • 2.Be6#
      • 1...Sd6
        • 2.Sc7#
      • 1...Se7
        • 2.Rd8#
      • 1...Sg7
        • 2.Sxf6#
      • 1...e3
        • 2.Qf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(i);N_GUARD::QAB(C)
    • S(i);N_GUARD::QAB(C),XS(i)
    • S(i);N_GUARD,XS(H)::QAB(C)
    • P(b);OGATEB::QAB(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(e);S_FLIGHT::S(D),XR(d)
      • Refutation
        • B(h);XS(H)
    • Try
      • R(G);CHECK
      • Vars
        • K(e);S_FLIGHT::S(D),XR(d)
      • Refutation
        • B(h);XR(G)
    • Try
      • Q(C);CHECK,N_PINS(f)
      • Vars
        • S(f);OGATE,P_SPINS(f)::B(A)
      • Refutation
        • B(h);P_SPINB(h)
  • Actual
    • Q(C);N_PINS(f)
    • Threat
      • QAB1(C),XP(b)
    • Vars
      • R(d);N_GUARD::QAB1(C),XR(d)
      • S(f);OGATE::B(A)
      • S(f);SBLOCK::S(D)
      • S(f);N_GUARD,S_CUTB(h)::R(G)
      • S(f);S_CUTQ(k)::S(H),XB(h)
      • P(b);OGATEB::QAB(C)
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).