MESON Chess Problem Database

Problem Display
PID: 237748 (1r6/3p1q2/7n/R1R1P2b/Kn1kP3/1p6/2pN1P1Q/b1N5 w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1953

1r6/3p1q2/7n/R1R1P2b/Kn1kP3/1p6/2pN1P1Q/b1N5

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Rxc4#
    • 1...Qg6
      • 2.Rc4#
    • 1...Qe8
      • 2.Rc4#
    • 1...Qxf2
      • 2.Qxf2#
    • 1...Qf3
      • 2.Rc4#
    • 1...Qf4
      • 2.Rc4#
    • 1...Qf5
      • 2.Rc4#
    • 1...Qf6
      • 2.Rc4#
    • 1...Qe7
      • 2.Rc4#
    • 1...Qg7
      • 2.Rc4#
    • 1...Qh7
      • 2.Rc4#
    • 1...Qf8
      • 2.Rc4#
    • 1...Sd5
      • 2.Rc4#
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qe3#
      • 1...Qxf4
        • 2.Rc4#
      • 1...Qd5
        • 2.exd5#
      • 1...Sd5
        • 2.Rc4#
      • 1...Sg4
        • 2.Sf3#
      • 1...Sf5
        • 2.exf5#
      • 1...d5
        • 2.Sdxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(i);N_GUARD::R1(H),XQ(i)
    • Q(i);N_GUARD::R1(H)
    • Q(i);OGATE,XP(C)::QAB(D),XQ(i)
    • S(d);S_CUTQ(i)::R1(H)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • Q(i);N_GUARD,XQ(D)::R1(H)
      • Q(i);OGATE::QAR(D)+P(F),XQ(i)
      • S(d);S_CUTQ(i)::R1(H)
      • S(g);S_CUTB(f)::S(B)
      • S(g);OGATE::QAR(D)+P(F),XS(g)
      • P(h);S_CUTQ(i)::S(B),XP(c)
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).