MESON Chess Problem Database

Problem Display
PID: 59543 (b1N2n2/6pB/n3p3/Rrb1k1B1/2P4N/p4R2/8/3Q3K w - - 0 1)

Ellerman, Arnoldo

Comm., Brisbane Courier, 1922-1923

b1N2n2/6pB/n3p3/Rrb1k1B1/2P4N/p4R2/8/3Q3K

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Qd6#
    • 1...Rb3
      • 2.Qd6#
    • 1...Rb4
      • 2.Qd6#
    • 1...Rb7
      • 2.Re3#
      • 2.Qd6#
    • 1...Rb8
      • 2.Qd6#
    • 1...Bg1
      • 2.Qd6#
    • 1...Bf2
      • 2.Qd6#
    • 1...Be3
      • 2.Qd6#
    • 1...Bb6
      • 2.Qd6#
    • 1...Bd6
      • 2.Qa1#
      • 2.Qxd6#
    • 1...Ba7
      • 2.Qd6#
    • 1...Be7
      • 2.Qa1#
    • 1...Bxf3+
      • 2.Sxf3#
  • Tries
    • 1.Sg6+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Sxg6!
    • 1.Qe1+?
      • 1...Kd4
        • 2.Qc3#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be3!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Bxf3+
        • 2.Sxf3#
      • 1...Bxd6
        • 2.Qa1#
      • 1...Sxh7
        • 2.Sg6#
      • 1...Rb7
        • 2.Re3#
      • 1...Sg6
        • 2.Sxg6#
      • 1...g6
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • R(b);P_SPINB(c)::QAB1(A)
    • B(c);N_GUARD,P_SPINR(b)::QAB1(A)
    • B(c);N_GUARD,P_SPINR(b)::QAB(A)
    • B(h);CHECK,XR(C)::S(E),XB(h)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • K(d);N_PINR(C),P-FLIGHT::QAB1(A)
      • Refutation
        • S(i);XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);S_FLIGHT::QAB1(A)
        • B(h);N_GUARD,P_SPINB(h)::QAR1(A),XB(h)
      • Refutation
        • B(c);P_SPINB(c),P_SPINR(b)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • B(h);CHECK,XR(C)::S(E),XB(h)
      • B(c);N_GUARD,P_SPINR(b),SBLOCK,XS(I)::QAB(A)
      • S(i);N_GUARD,XB(H)::S(E)
      • R(b);N_PINR(C),P_SPINB(c)::R(C)
      • S(i);N_GUARD::S(E),XS(i)
      • P(g);N_GUARD::B(G)
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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).