MESON Chess Problem Database

Problem Display
PID: 139473 (2BKn3/8/3k3r/Q4pp1/1p1Nn3/8/4R2q/4br1b w - - 0 1)

Ellerman, Arnoldo

Jaque, 1934

2BKn3/8/3k3r/Q4pp1/1p1Nn3/8/4R2q/4br1b

#2

5 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qe5#
    • 1...S4f6
      • 2.Re6#
  • Keys
    • 1.Bb7!
      • threat
        • 2.Qd5#
      • 1...Qe5
        • 2.Qb6#
      • 1...Sd2
        • 2.Qxb4#
      • 1...Sf2
        • 2.Sxf5#
      • 1...Sc3
        • 2.Qxb4#
      • 1...Sg3
        • 2.Qe5#
      • 1...Sc5
        • 2.Sb5#
      • 1...S4f6
        • 2.Re6#
      • 1...S8f6
        • 2.Qc7#
      • 1...Sc7
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • S(f);S_CUTQ(d)::QAB1(C)
    • S(f);OGATE::R1(A)
  • Actual
    • B(D);
    • Threat
      • QAR1(C)
    • Vars
      • Q(d);SBLOCK::QAR2(C)
      • S(f);N_GUARD,S_CUTB(a)::QAB(C),XP(e)
      • S(f);S_CUTR(b)::S(B),XP(g)
      • S(f);S_CUTQ(d)::QAB1(C)
      • S(f);SBLOCK::S(B)
      • S(f);OGATE::R1(A)
      • S(k);N_GUARD::QAB1(C)
      • S(k);N_GUARD::QAB1(C),XS(k)
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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).