MESON Chess Problem Database

Problem Display
PID: 133756 (R2bknN1/2p4p/2pr1p1K/2B2Q2/8/1B6/8/8 w - - 0 1)

Brotherton, David WA

The Field, 1962

(First published on Thu Jan 4 1962)

R2bknN1/2p4p/2pr1p1K/2B2Q2/8/1B6/8/8

#2

6 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Sxf6#
    • 1...Rd2
      • 2.Sxf6#
    • 1...Rd3
      • 2.Sxf6#
    • 1...Rd4
      • 2.Sxf6#
    • 1...Rd7
      • 2.Sxf6#
  • Tries
    • 1.Bxd6?
      • threat
        • 2.Sxf6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sd7
        • 2.Qe6#
        • 2.Qh5#
      • 1...cxd6!
    • 1.Rxd8+?
      • 1...Rxd8
        • 2.Sxf6#
      • 1...Kxd8!
  • Keys
    • 1.Qxf6!
      • 1...Rxf6+
        • 2.Sxf6#
      • 1...Kd7
        • 2.Rxd8#
      • 1...Re6
        • 2.Rxd8#
      • 1...Rd1
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rd2
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rd3
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rd4
        • 2.Qe7#
        • 2.Qf7#
      • 1...Rd5
        • 2.Qe7#
      • 1...Rd7
        • 2.Qxf8#
      • 1...Se6
        • 2.Qe7#
      • 1...Sg6
        • 2.Qf7#
      • 1...Sd7
        • 2.Rxd8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(b);N_GUARD::S(F),XP(c)
  • Tries
    • Try
      • B(B);XR(b)
      • Threat
        • S(F),XP(c)
      • Vars
        • S(h);N_GUARD::QAR2(C),XS(h)
      • Refutation
        • P(d);XB(B)
    • Try
      • R(E);CHECK,XB(f)
      • Vars
        • R(b);SBLOCK,XR(E)::S(F),XP(c)
      • Refutation
        • K(g);P-FLIGHT,XR(E)
  • Actual
    • Q(C);P_SPINQ(C),XP(c)
    • Vars
      • R(b);CHECK,XQ(C)::S(F),XR(b)
      • K(g);N_SPINB(f),S_FLIGHT::R1(E),XB(f)
      • R(b);N_GUARD::R1(E),XB(f)
      • R(b);N_PINQ(C)::QAR1(C)
      • R(b);N_PINQ(C),SBLOCK::QAR1(C),XS(h)
      • S(h);N_PINQ(C)::QAR1(C)
      • S(h);N_PINQ(C)::QAB1(C)
      • S(h);S_CUTR(b)::R1(E),XB(f)
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).