MESON Chess Problem Database

Problem Display
PID: 195223 (5Nb1/1r1r4/1p1P3Q/3nk1p1/1nR3B1/1KP5/5P2/2bRB3 w - - 0 1)

Ellerman, Arnoldo

Densmore MT (Pittsburgh Gazette-Times), 1918

5Nb1/1r1r4/1p1P3Q/3nk1p1/1nR3B1/1KP5/5P2/2bRB3

#2

10 + 9

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.Sxd7#
    • 1...Rf7
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Bh7
      • 2.Qe6#
    • 1...Sxc3
      • 2.Bxc3#
    • 1...Sf4
      • 2.Qxg5#
    • 1...Sf6
      • 2.Sg6#
    • 1...Sc7
      • 2.Sxd7#
    • 1...Se7
      • 2.Qg7#
      • 2.Qh8#
  • Tries
    • 1.Qf6+?
      • 1...Sxf6
        • 2.Sg6#
      • 1...Kxf6!
    • 1.Qg6?
      • threat
        • 2.Re4#
      • 1...Sxc3
        • 2.Bxc3#
        • 2.Qf5#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sf4
        • 2.Qf5#
        • 2.Qxg5#
      • 1...Sf6
        • 2.Qf5#
      • 1...Sc7
        • 2.Sxd7#
        • 2.Qf5#
      • 1...Se7
        • 2.Qg7#
      • 1...Se3!
  • Keys
    • 1.f3!
      • threat
        • 2.Re4#
      • 1...Sxc3
        • 2.Bxc3#
      • 1...Be6
        • 2.Qxe6#
      • 1...Bh7
        • 2.Qe6#
      • 1...Se3
        • 2.Bg3#
      • 1...Sf4
        • 2.Qxg5#
      • 1...Sf6
        • 2.Sg6#
      • 1...Sc7
        • 2.Sxd7#
      • 1...Se7
        • 2.Qg7#
        • 2.Qh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::S(J),XR(h)
    • R(h);S_CUTB(i)::QAR1(I)
    • B(i);N_GUARD::QAR1(I),XB(i)
    • B(i);N_GUARD::QAR1(I)
    • S(c);OGATE,P_PINR(F),XP(E)::B(B),XS(c)
    • S(c);P_PINR(F),S_CUTB(a)::QAR2(I),XP(e)
    • S(c);P_PINR(F),SBLOCK::S(J)
    • S(c);P_PINR(F),S_CUTR(g)::S(J),XR(h)
  • Tries
    • Try
      • Q(I);CHECK
      • Vars
        • S(c);P_PINR(F),SBLOCK,XQ(I)::S(J)
      • Refutation
        • K(d);S_FLIGHT,XQ(I)
    • Try
      • Q(I);
      • Threat
        • R1(F)
      • Vars
        • B(i);N_GUARD::QAR1(I),XB(i)
        • S(c);P_PINR(F)::QAR1(I)
        • S(c);N_GUARD,P_PINR(F),S_CUTR(h)::QAB(I)
      • Refutation
        • S(c);P_PINR(F)
  • Actual
    • P(C);
    • Threat
      • R1(F)
    • Vars
      • S(c);OGATE,P_PINR(F),XP(E)::B(B),XS(c)
      • B(i);N_GUARD::QAR1(I),XB(i)
      • B(i);N_GUARD::QAR1(I)
      • S(c);N_GUARD,P_PINR(F),S_CUTB(a)::B(B)
      • S(c);P_PINR(F),S_CUTB(a)::QAR2(I),XP(e)
      • S(c);P_PINR(F),SBLOCK::S(J)
      • S(c);P_PINR(F),S_CUTR(g)::S(J),XR(h)
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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).