MESON Chess Problem Database

Problem Display
PID: 143391 (Q1b1nK2/3p2pB/p3kp2/2P2N1r/3p4/3N4/2P1r3/b3qn2 w - - 0 1)

Ellerman, Arnoldo

Good Companions (July), 1917

Q1b1nK2/3p2pB/p3kp2/2P2N1r/3p4/3N4/2P1r3/b3qn2

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sf4#
    • 1...Rxf5
      • 2.Bg8#
    • 1...Se3
      • 2.Qe4#
    • 1...Sd6
      • 2.Sxg7#
    • 1...Sc7
      • 2.Sxg7#
    • 1...d5
      • 2.Qxc8#
  • Keys
    • 1.c4!
      • threat
        • 2.Qd5#
      • 1...Rxf5
        • 2.Bg8#
      • 1...dxc4 ep
        • 2.Sd4#
      • 1...d5
        • 2.Qxd5#
        • 2.Qxc8#
      • 1...d6
        • 2.Qxc8#
      • 1...Re5
        • 2.Sf4#
      • 1...Bb7
        • 2.Qxe8#
      • 1...Se3
        • 2.Qe4#
      • 1...Sc7
        • 2.Sxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(d);SBLOCK::S(B)
    • R(f);SBLOCK,XS(D)::B(E)
    • S(c);S_CUTR(d)::QAR2(F)
    • S(m);N_GUARD::S(D),XP(k)
    • P(j);OGATEB,SBLOCK::QAB(F),XB(l)
  • Actual
    • P(A);
    • Threat
      • QAB1(F)
    • Vars
      • R(f);SBLOCK,XS(D)::B(E)
      • P(e);EP,S_CUTB(a),XP(A)::S(D)
      • P(j);OGATEB::QAB(F),XB(l)
      • R(d);SBLOCK::S(B)
      • B(l);OGATE::QAR2(F),XS(m)
      • S(c);S_CUTR(d)::QAR2(F)
      • S(m);N_GUARD::S(D),XP(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).