MESON Chess Problem Database

Problem Display
PID: 59934 (3BB3/3P3p/3p2qp/r1R1r2k/p7/3Q1K2/7b/3n4 w - - 0 1)

Hawes, Frederick Thomas

O'Keefe, John James

1st Highly Comm., Brisbane Courier, 1925

3BB3/3P3p/3p2qp/r1R1r2k/p7/3Q1K2/7b/3n4

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7+
      • 2.Bxf7#
    • 1...Qxe8
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Rf5+
      • 2.Qxf5#
  • Tries
    • 1.Rxe5+?
      • 1...Bxe5
        • 2.Qf5#
      • 1...dxe5
        • 2.Qf5#
      • 1...Rxe5!
    • 1.Qe4?
      • threat
        • 2.Qg4#
        • 2.Qh4#
      • 1...Qf7+
        • 2.Bxf7#
      • 1...Rf5+
        • 2.Qxf5#
      • 1...Qxe8
        • 2.Qg4#
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Bg3
        • 2.Qg4#
      • 1...Rg5
        • 2.Qg4#
      • 1...Sf2
        • 2.Qh4#
      • 1...Se3
        • 2.Qh4#
      • 1...Bf4!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qxh2#
      • 1...Qf7+
        • 2.Bxf7#
      • 1...Rf5+
        • 2.Ke4#
      • 1...Qxe8
        • 2.dxe8Q#
        • 2.dxe8B#
      • 1...Bg3
        • 2.Kg2#
      • 1...Bg1
        • 2.Kf4#
      • 1...Bf4
        • 2.Kxf4#
      • 1...Sf2
        • 2.Kxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(h);CHECK,OGATEB::B(F),XQ(h)
    • Q(h);N_SPINQ(h),OGATE,XB(F)::PXQ(h)=Q
    • R(e);CHECK,N_GUARD::QAR2(A),XR(e)
  • Tries
    • Try
      • R(C);CHECK,XR(e)
      • Vars
        • B(b);XR(C)::QAR2(A)
        • P(g);XR(C)::QAR2(A)
      • Refutation
        • R(d);XR(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(h);CHECK,OGATEB::B(F),XQ(h)
        • R(e);CHECK,N_GUARD::QAR2(A),XR(e)
        • B(b);::QAB1(A)
        • R(e);::QAB1(A)
        • S(a);::QAR1(A)
      • Refutation
        • B(b);
  • Actual
    • Q(A);
    • Threat
      • QAR(A),XB(b)
    • Vars
      • Q(h);CHECK,OGATEB::B(F),XQ(h)
      • R(e);CHECK::QAB(A)+K(B)
      • Q(h);N_SPINQ(h),OGATE,XB(F)::PXQ(h)=Q
      • B(b);::QAB(A)+K(B)
      • B(b);::QAB(A)+K(B),XB(b)
      • S(a);::QAB(A)+K(B),XS(a)
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).