MESON Chess Problem Database

Problem Display
PID: 140410 (4R3/3p4/r3p2K/4PP2/1R1Bkrp1/p1p1Nb2/B6Q/2q1N3 w - - 0 1)

Ellerman, Arnoldo

Problemas, 1945

4R3/3p4/r3p2K/4PP2/1R1Bkrp1/p1p1Nb2/B6Q/2q1N3

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qc2#
    • 1...Qxe1
      • 2.Qc2#
    • 1...Qc2
      • 2.Qxc2#
    • 1...Rxf5
      • 2.Bc5#
      • 2.Bb6#
      • 2.Ba7#
    • 1...exf5+
      • 2.Bb6#
  • Keys
    • 1.Sf1!
      • threat
        • 2.Sg3#
      • 1...Rxf5+
        • 2.Be3#
      • 1...exf5+
        • 2.Bb6#
      • 1...Kxf5
        • 2.Sg3#
      • 1...Qxe1
        • 2.Qc2#
      • 1...g3
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD::QAB(C)
    • Q(a);N_GUARD,XS(A)::QAB(C)
    • Q(a);N_GUARD::QAB(C),XQ(a)
    • P(i);CHECK,XP(H)::R(E)+B(F)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • R(f);CHECK,SBLOCK,XP(H)::R(E)+B(F)
      • P(i);CHECK,SBLOCK,XP(H)::R(E)+B(F)
      • K(e);S_FLIGHT,XP(H)::S(D)
      • Q(a);N_GUARD,XS(A)::QAB(C)
      • P(g);::S(D),XP(g)
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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).