MESON Chess Problem Database

Problem Display
PID: 80633 (nnN3R1/1r4N1/PRbPpkPp/KQ4rP/7B/8/8/8 w - - 0 1)

Ellerman, Arnoldo

Good Companions (March), 1919

nnN3R1/1r4N1/PRbPpkPp/KQ4rP/7B/8/8/8

#2

11 + 8

3391 Het Half Pin Thema 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.Se8#
    • 1...Bh1
      • 2.Se8#
    • 1...Bg2
      • 2.Se8#
    • 1...Bf3
      • 2.Se8#
    • 1...Be4
      • 2.Se8#
    • 1...Be8
      • 2.Sxe8#
    • 1...Sd7
      • 2.Se8#
  • Tries
    • 1.Rf8+?
      • 1...Rf7
        • 2.Rxf7#
      • 1...Kxg7!
  • Keys
    • 1.d7!
      • threat
        • 2.Se8#
      • 1...Bxb5
        • 2.Rxe6#
      • 1...Bxd7
        • 2.Qf5#
      • 1...Bd5
        • 2.Qb2#
      • 1...Sc7
        • 2.d8Q#
        • 2.d8B#
      • 1...e5
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 7
  • Sets
    • R(f);S_CUTB(b)::S(I)
    • B(b);N_GUARD::S(I)
    • B(b);N_GUARD::S(I),XB(b)
    • S(h);S_CUTB(b)::S(I)
  • Tries
    • Try
      • R(K);CHECK
      • Vars
        • R(f);N_GUARD::R1(K),XR(f)
      • Refutation
        • K(d);N_SPINR(a),S_FLIGHT,XS(I)
  • Actual
    • P(G);
    • Threat
      • S(I)
    • Vars
      • B(b);OGATE,P_SPINP(c),XQ(C)::R1(F),XP(c)
      • B(b);P_SPINP(c),XP(G)::QAR1(C)
      • B(b);N_PINQ(C),P_SPINP(c)::QAB(C)
      • S(g);S_CUTR(f)::P=Q
      • P(c);N_PINQ(C),P_SPINB(b),SBLOCK::QAR(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).