MESON Chess Problem Database

Problem Display
PID: 44853 (2n2b2/pN6/ppN5/rk2P1P1/1rR3QK/2Pn4/2B5/8 w - - 0 1)

Eddy, Edwin John

Recomm., BCF 043. Ty., 1942-1943

2n2b2/pN6/ppN5/rk2P1P1/1rR3QK/2Pn4/2B5/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd6
      • 2.Sxa7#
    • 1...Se7
      • 2.Sxa7#
      • 2.Sd6#
  • Tries
    • 1.Sd6+?
      • 1...Sxd6
        • 2.Sxa7#
      • 1...Bxd6!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Scxa5#
      • 1...Rxc4+
        • 2.Sd4#
      • 1...Kxc4
        • 2.Qxd3#
      • 1...Sxe5
        • 2.Sxe5#
      • 1...Ra1
        • 2.Sca5#
      • 1...Ra2
        • 2.Sca5#
      • 1...Ra3
        • 2.Sca5#
      • 1...Raa4
        • 2.Sca5#
      • 1...Sc5
        • 2.Rxb4#
      • 1...Se7
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(h);N_GUARD::S(H),XP(g)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • S(h);XS(I)::S(H),XP(g)
      • Refutation
        • B(i);XS(I)
  • Actual
    • Q(D);P_SPINR(C)
    • Threat
      • QAB(D)+S(H),XR(c)
    • Vars
      • R(b);CHECK,SBLOCK,XR(C)::QAB(D)+S(H),DCHECK
      • K(d);OGATEB,S_FLIGHT,XR(C)::QAB1(D),XS(a)
      • S(a);XP(F)::QAB(D)+S(H),XS(a)
      • R(c);::QAB(D)+S(H)
      • S(a);N_GUARD,S_CUTB(i)::R1(C),XR(b)
      • S(h);N_GUARD,S_CUTB(i)::S(I)
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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).