MESON Chess Problem Database

Problem Display
PID: 54103 (4B3/6B1/2n1k3/R3PN1R/pn3p2/1r1N3K/Q3P3/2b5 w - - 0 1)

Ellerman, Arnoldo

Chess, 1943

4B3/6B1/2n1k3/R3PN1R/pn3p2/1r1N3K/Q3P3/2b5

#2

10 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe5
      • 2.Rxe5#
    • 1...Se7
      • 2.Sd4#
  • Tries
    • 1.Qxb3+?
      • 1...Sd5
        • 2.Sc5#
        • 2.Qxd5#
      • 1...axb3!
  • Keys
    • 1.e4!
      • threat
        • 2.Rh6#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...fxe4 ep
        • 2.Sf4#
      • 1...Sd5
        • 2.exd5#
      • 1...Se7
        • 2.Sd4#
      • 1...f3
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);OGATE,XP(F)::R1(E),XS(f)
    • S(f);N_GUARD,SBLOCK::S(G)
  • Tries
    • Try
      • Q(A);CHECK,N_SPINS(C),XR(b)
      • Refutation
        • P(c);XQ(A)
  • Actual
    • P(B);
    • Threat
      • R(H)
    • Vars
      • S(f);OGATE,XP(F)::R1(E),XS(f)
      • P(e);EP,N_PINS(C),XP(B)::S(C)
      • S(d);N_SPINR(b),OGATE::P(B),XS(d)
      • S(f);N_GUARD,SBLOCK::S(G)
      • P(e);N_PINS(C)::S(C)
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Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).