MESON Chess Problem Database

Problem Display
PID: 83617 (5n2/Rq3kNP/1bp3N1/nr6/1pb3Pp/4pK2/B5P1/BQ3R2 w - - 0 1)

Ellerman, Arnoldo

Magasinet, 1932

5n2/Rq3kNP/1bp3N1/nr6/1pb3Pp/4pK2/B5P1/BQ3R2

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qe7
      • 2.Sh8#
      • 2.Rxe7#
    • 1...Rf5+
      • 2.Qxf5#
    • 1...Bd5+
      • 2.Ke2#
    • 1...Bc5
      • 2.Qf5#
    • 1...c5+
      • 2.Kxe3#
  • Tries
    • 1.Bxc4+?
      • 1...Rd5
        • 2.Ke2#
        • 2.Qf5#
      • 1...Se6
        • 2.Bxe6#
      • 1...Sxc4!
  • Keys
    • 1.h8Q!
      • threat
        • 2.Qxf8#
      • 1...Rf5+
        • 2.Qxf5#
      • 1...Bd5+
        • 2.Ke2#
      • 1...c5+
        • 2.Kxe3#
      • 1...Sxg6
        • 2.Qe8#
      • 1...Bc5
        • 2.Qf5#
      • 1...Se6
        • 2.Qe8#
      • 1...Sd7
        • 2.Qe8#
      • 1...Sh7
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(f);CHECK,N_GUARD::QAR2(B),XR(f)
    • B(c);CHECK::R(C)+K(F)
    • B(g);S_CUTR(f)::QAR2(B)
    • P(h);CHECK::R(C)+K(F),XP(a)
  • Tries
    • Try
      • B(D);CHECK,XB(c)
      • Vars
        • S(k);N_GUARD,P_SPINS(k)::B(D),XS(k)
      • Refutation
        • S(e);XB(D)
  • Actual
    • P(K);
    • Threat
      • QAR1(K),XS(k)
    • Vars
      • R(f);CHECK,N_GUARD::QAR2(B),XR(f)
      • B(c);CHECK::R(C)+K(F)
      • P(h);CHECK::R(C)+K(F),XP(a)
      • S(k);OGATE,XS(H)::QAB1(K)
      • B(g);S_CUTR(f)::QAR2(B)
      • S(k);N_SPINB(c),OGATE::QAB1(K)
      • S(k);N_SPINQ(i),OGATE::QAB1(K)
      • S(k);OGATE::QAB1(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).