MESON Chess Problem Database

Problem Display
PID: 234376 (K4B1b/1Rp2B1b/2N5/1PNr4/1Pk3nn/pp1pQ2R/3P4/4r3 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1952

K4B1b/1Rp2B1b/2N5/1PNr4/1Pk3nn/pp1pQ2R/3P4/4r3

#2

11 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg8
      • 2.Qxd3#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Se5
      • 2.Qd4#
    • 1...Sf6
      • 2.Qd4#
    • 1...Sf5
      • 2.Qxd3#
    • 1...Sg6
      • 2.Qxd3#
  • Keys
    • 1.Se6!
      • threat
        • 2.Sa5#
      • 1...Rd8+
        • 2.Sexd8#
      • 1...Rxb5
        • 2.Sc5#
      • 1...Rd4
        • 2.Sexd4#
      • 1...Rc5
        • 2.Sxc5#
        • 2.Qxc5#
      • 1...Re5
        • 2.Qd4#
      • 1...Rf5
        • 2.Qxd3#
      • 1...Rg5
        • 2.Sxg5#
      • 1...Rh5
        • 2.Sg5#
      • 1...Rd6
        • 2.Qc5#
      • 1...Rd7
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 6
  • Sets
    • B(j);N_GUARD::QAB1(B),XP(d)
    • B(k);N_GUARD::QAR1(B),XB(k)
    • S(f);S_CUTB(k)::QAR1(B)
    • S(g);S_CUTB(j)::QAB1(B),XP(d)
  • Actual
    • S(F);N_PINR(h)
    • Threat
      • S(G)
    • Vars
      • R(h);CHECK::B(I)+S(F),XR(h)
      • R(h);XP(E)::B(I)+S(F)
      • R(h);::B(I)+S(F),XR(h)
      • R(h);N_GUARD,S_CUTB(k)::QAR1(B)
      • R(h);N_GUARD,S_CUTB(j)::QAB1(B),XP(d)
      • R(h);::B(I)+S(F)
      • R(h);N_GUARD::QAR1(B)
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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).