MESON Chess Problem Database

Problem Display
PID: 178547 (K1B3NN/5p2/p4pP1/2Q1n1kp/1p3p1p/r6P/4R3/q2b1R2 w - - 0 1)

Ellerman, Arnoldo

Bulletin Ouvrier des Echecs, 1952

K1B3NN/5p2/p4pP1/2Q1n1kp/1p3p1p/r6P/4R3/q2b1R2

#2

9 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rg1#
    • 1...Ra4
      • 2.Rg1#
    • 1...Ra5
      • 2.Rg1#
    • 1...Bb3
      • 2.Rg2#
    • 1...b3
      • 2.Rg1#
    • 1...fxg6
      • 2.Sf7#
  • Keys
    • 1.Qd6!
      • threat
        • 2.Qxf6#
      • 1...Sxg6
        • 2.Sxf7#
      • 1...Sd7
        • 2.Qxf4#
      • 1...Sd3
        • 2.Rg1#
      • 1...Sf3
        • 2.Rg2#
      • 1...Sc4
        • 2.Qxf4#
      • 1...Sg4
        • 2.Qxf4#
      • 1...Sc6
        • 2.Qxf4#
      • 1...f5
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD::R(A)
    • B(b);N_GUARD,S_CUTR(c)::R(B)
    • P(d);S_CUTR(c)::R(A)
    • P(l);SBLOCK,XP(E)::S(I)
  • Actual
    • Q(D);N_PINS(g)
    • Threat
      • QAB1(D),XP(k)
    • Vars
      • S(g);N_GUARD,SBLOCK,XP(E)::S(I),XP(l)
      • S(g);OGATE::QAB1(D),XP(e)
      • S(g);N_GUARD,S_CUTR(c)::R(A)
      • S(g);N_GUARD,S_CUTB(b),S_CUTR(c)::R(B)
      • P(k);::QAB1(D)
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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).