MESON Chess Problem Database

Problem Display
PID: 55932 (2N1B1n1/5n1p/3Rb3/b1Np1k1p/3B1P2/1p5K/1P6/2Q3R1 w - - 0 1)

McArthur, William Johnstone

5th Comm., Brisbane Courier, 1913

2N1B1n1/5n1p/3Rb3/b1Np1k1p/3B1P2/1p5K/1P6/2Q3R1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bd7
      • 2.Bxd7#
    • 1...Sg5+
      • 2.Rxg5#
    • 1...Sxd6
      • 2.Sxd6#
      • 2.Rg5#
    • 1...Sfh6
      • 2.Rg5#
    • 1...Sd8
      • 2.Rg5#
    • 1...Sh8
      • 2.Rg5#
    • 1...Sf6
      • 2.Se7#
    • 1...Sgh6
      • 2.Se7#
    • 1...Se7
      • 2.Sxe7#
  • Tries
    • 1.Bxf7?
      • threat
        • 2.Bxe6#
        • 2.Rg5#
      • 1...Bxf7
        • 2.Rg5#
      • 1...Bxc8
        • 2.Rg5#
        • 2.Rxd5#
      • 1...Bd8
        • 2.Bxe6#
      • 1...Bd7
        • 2.Rg5#
        • 2.Rxd5#
      • 1...h6
        • 2.Bxe6#
        • 2.Bg6#
      • 1...Bd2!
  • Keys
    • 1.Rf1!
      • threat
        • 2.Qb1#
      • 1...Kg6+
        • 2.f5#
      • 1...Sg5+
        • 2.fxg5#
      • 1...Sxd6
        • 2.Sxd6#
      • 1...Se5
        • 2.fxe5#
      • 1...Sf6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • B(f);OGATEB::B(J),XB(f)
    • S(g);CHECK,N_GUARD::R1(B),XS(g)
    • S(g);N_GUARD::R1(B)
    • S(i);N_GUARD::S(I)
    • S(i);N_GUARD::S(I),XS(i)
  • Tries
    • Try
      • B(J);XS(g)
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XB(J)::R1(B)
        • B(b);::B(J),XB(f)
      • Refutation
        • B(b);
  • Actual
    • R(B);
    • Threat
      • QAB(A)
    • Vars
      • K(d);CHECK,OGATE,P_SPINB(f),P_SPINS(g),S_FLIGHT::P(F)
      • S(g);CHECK,OGATE::R(B)+P(F),XS(g)
      • S(g);XR(H)::S(I),XS(g)
      • S(g);OGATE::R(B)+P(F),XS(g)
      • S(i);N_GUARD::S(I)
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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).