MESON Chess Problem Database

Problem Display
PID: 18171 (B1N1Q3/1r1p1K2/1Bk5/R1b1p3/4R3/3n4/8/8 w - - 0 1)

Sprague, Gordon

Time & Tide, 1953

B1N1Q3/1r1p1K2/1Bk5/R1b1p3/4R3/3n4/8/8

#2

7 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Bxb7#
    • 1...Sc1
      • 2.Rxc5#
    • 1...Se1
      • 2.Rxc5#
    • 1...Sb2
      • 2.Rxc5#
    • 1...Sf2
      • 2.Rxc5#
    • 1...Sb4
      • 2.Rxc5#
    • 1...Sf4
      • 2.Rxc5#
  • Keys
    • 1.Qd8!
      • 1...d5+
        • 2.Qc7#
      • 1...d6+
        • 2.Se7#
      • 1...Kd5
        • 2.Bxb7#
      • 1...Bxb6
        • 2.Qxb6#
      • 1...Bg1
        • 2.Qc7#
      • 1...Bf2
        • 2.Qc7#
      • 1...Ba3
        • 2.Qc7#
      • 1...Be3
        • 2.Qc7#
      • 1...Bb4
        • 2.Qc7#
      • 1...Bd4
        • 2.Qc7#
      • 1...Bd6
        • 2.Sa7#
      • 1...Be7
        • 2.Qc7#
      • 1...Bf8
        • 2.Qc7#
      • 1...Sc1
        • 2.Rxc5#
      • 1...Se1
        • 2.Rxc5#
      • 1...Sb2
        • 2.Rxc5#
      • 1...Sf2
        • 2.Rxc5#
      • 1...Sb4
        • 2.Rxc5#
      • 1...Sf4
        • 2.Rxc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINP(f),P_SPINB(b),S_FLIGHT::B(E),XR(e)
    • S(a);N_GUARD::R1(B),XB(b)
  • Actual
    • Q(G);N_PINP(f)
    • Vars
      • P(f);CHECK,SBLOCK::QAR1(G)
      • P(f);CHECK,S_CUTB(b)::S(F)
      • K(d);P_SPINB(b),P_SPINP(f),S_FLIGHT::B(E),XR(e)
      • B(b);OGATE,XB(C)::QAR1(G),XB(b)
      • B(b);::QAR1(G)
      • B(b);SBLOCK::S(F)
      • S(a);N_GUARD::R1(B),XB(b)
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).