MESON Chess Problem Database

Problem Display
PID: 19050 (2b5/1q1prp1N/1r6/1n5R/4k3/1N2p1Bp/4Q3/4n2K w - - 0 1)

Blake, Percy Francis

HM., Sydney Morning Herald, 1911

2b5/1q1prp1N/1r6/1n5R/4k3/1N2p1Bp/4Q3/4n2K

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rf6
      • 2.Sxf6#
    • 1...Re5
      • 2.Rxe5#
    • 1...Sf3
      • 2.Qc2#
    • 1...Sd4
      • 2.Sd2#
      • 2.Sc5#
    • 1...Sd6
      • 2.Sf6#
    • 1...d6
      • 2.Sf6#
  • Tries
    • 1.Rh4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf5+!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qf5#
      • 1...Re5
        • 2.Rxe5#
      • 1...e2
        • 2.Qxe2#
      • 1...f5
        • 2.Qxf5#
      • 1...Qd5
        • 2.Rh4#
      • 1...Rf6
        • 2.Sxf6#
      • 1...Sf3
        • 2.Qb1#
      • 1...Sd4
        • 2.Sc5#
      • 1...Sd6
        • 2.Sf6#
      • 1...d5
        • 2.Sg5#
      • 1...d6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD::S(F),XR(f)
    • R(i);N_GUARD::R1(E),XR(i)
    • S(a);N_GUARD,SBLOCK::QAB(B)
    • S(e);S_CUTR(f)::S(F)
    • P(h);S_CUTR(f)::S(F)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);N_SPINP(b),S_FLIGHT::QAB1(B)
      • Refutation
        • K(d);CHECK,N_SPINP(b),S_FLIGHT
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • QAB1(B)
    • Vars
      • R(i);N_GUARD::R1(E),XR(i)
      • P(b);OGATEB::QAR2(B),XP(b)
      • P(j);::QAB1(B),XP(j)
      • Q(g);SBLOCK::R(E)
      • R(f);N_GUARD::S(F),XR(f)
      • S(a);OGATE,SBLOCK::QAB(B)
      • S(e);SBLOCK::S(C)
      • S(e);S_CUTR(f)::S(F)
      • P(h);SBLOCK::S(F)
      • P(h);S_CUTR(f)::S(F)
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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).