MESON Chess Problem Database

Problem Display
PID: 157530 (1Bb3n1/r1n4N/3rp1R1/4k3/1N2p2q/4P1pB/8/5QK1 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1919

1Bb3n1/r1n4N/3rp1R1/4k3/1N2p2q/4P1pB/8/5QK1

#2

8 + 10

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rxg5#
    • 1...Qe7
      • 2.Qf4#
    • 1...Qd8
      • 2.Qf4#
    • 1...Qxh3
      • 2.Qf4#
    • 1...Qf4
      • 2.Qxf4#
    • 1...Qh5
      • 2.Qf4#
    • 1...Qxh7
      • 2.Qf4#
    • 1...Rd7
      • 2.Rxe6#
    • 1...Sb5
      • 2.Qxb5#
    • 1...Sd5
      • 2.Sc6#
    • 1...Sa6
      • 2.Qa1#
    • 1...Sa8
      • 2.Qb5#
    • 1...Se8
      • 2.Qb5#
  • Tries
    • 1.Qa1+?
      • 1...Rd4
        • 2.Qxd4#
      • 1...Rxa1+!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf7#
      • 1...Qxg5
        • 2.Rxg5#
      • 1...Rd7
        • 2.Rxe6#
      • 1...Qf4
        • 2.Qxf4#
      • 1...Qh7
        • 2.Qf4#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sd5
        • 2.Sc6#
      • 1...Sa6
        • 2.Qa1#
      • 1...Sa8
        • 2.Qb5#
      • 1...Se8
        • 2.Qb5#
      • 1...Sh6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::R(F),XQ(c)
    • Q(c);N_GUARD::QAB1(A)
    • Q(c);N_GUARD,XB(D)::QAB1(A)
    • Q(c);N_GUARD::QAB1(A),XQ(c)
    • Q(c);N_GUARD,XS(G)::QAB1(A)
    • R(e);N_GUARD,P_SPINS(h),S_CUTB(i)::R1(F),XP(f)
    • S(h);N_GUARD,P_SPINR(e)::QAR(A),XS(h)
    • S(h);P_SPINR(e),SBLOCK::S(E)
    • S(h);P_SPINR(e),S_CUTR(g)::QAB(A)
    • S(h);N_GUARD,P_SPINR(e)::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(e);N_GUARD,P_SPINR(e),P_SPINS(h)::QAB1(A),XR(e)
      • Refutation
        • R(g);CHECK,XQ(A)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • Q(c);OGATE,XS(G)::R(F),XQ(c)
      • R(e);N_GUARD,P_SPINS(h),S_CUTB(i)::R1(F),XP(f)
      • Q(c);N_GUARD::QAB1(A),XQ(c)
      • Q(c);N_GUARD::QAB1(A)
      • S(h);N_GUARD,P_SPINR(e)::QAR(A),XS(h)
      • S(h);P_SPINR(e),SBLOCK::S(E)
      • S(h);P_SPINR(e),S_CUTR(g)::QAB(A)
      • S(h);N_GUARD,P_SPINR(e)::QAR(A)
      • S(j);N_GUARD::QAB1(A)
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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).