MESON Chess Problem Database

Problem Display
PID: 140038 (b1B3N1/B7/p6R/2p1p1k1/r5p1/q2p1PQ1/3N1nK1/b7 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

b1B3N1/B7/p6R/2p1p1k1/r5p1/q2p1PQ1/3N1nK1/b7

#2

8 + 11

56 The Problemist 1938

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxe5#
    • 1...Rf4
      • 2.Qh4#
    • 1...Bxf3+
      • 2.Sxf3#
    • 1...Se4
      • 2.Qxg4#
    • 1...c4
      • 2.Be3#
    • 1...e4
      • 2.f4#
  • Keys
    • 1.Bb6!
      • threat
        • 2.Bd8#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Rd4
        • 2.Qxe5#
      • 1...Rf4
        • 2.Qh4#
      • 1...Se4
        • 2.Qxg4#
      • 1...c4
        • 2.Be3#
      • 1...e4
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(e);S_CUTB(a)::QAR2(D),XP(h)
    • R(e);SBLOCK::QAB1(D)
    • B(k);CHECK,XP(C)::S(A),XB(k)
    • S(b);N_GUARD,N_PINP(C),S_CUTR(e)::QAR1(D),XP(f)
    • P(g);OGATE::B(F)
    • P(h);N_PINP(C)::P(C)
  • Actual
    • B(F);
    • Threat
      • B(F)
    • Vars
      • B(k);CHECK,XP(C)::S(A),XB(k)
      • R(e);S_CUTB(a)::QAR2(D),XP(h)
      • R(e);SBLOCK::QAB1(D)
      • S(b);N_GUARD,N_PINP(C),S_CUTR(e)::QAR1(D),XP(f)
      • P(g);OGATE::B(F)
      • P(h);N_PINP(C)::P(C)
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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).