MESON Chess Problem Database

Problem Display
PID: 139661 (1Q6/p2KN3/r2n2pq/1pR2P2/5k2/2p3R1/3r1N1P/b1B5 w - - 0 1)

Ellerman, Arnoldo

Brisbane Courier, 1916

1Q6/p2KN3/r2n2pq/1pR2P2/5k2/2p3R1/3r1N1P/b1B5

#2

9 + 10

56 The Problemist 1937

SOLUTION

  • SOUND
  • Sets
    • 1...Qf8
      • 2.Sxg6#
    • 1...Qh3
      • 2.Sxg6#
    • 1...Qh4
      • 2.Sxg6#
    • 1...Qh8
      • 2.Sxg6#
    • 1...Ra2
      • 2.Qxd6#
    • 1...Ra3
      • 2.Qxd6#
    • 1...Ra4
      • 2.Qxd6#
    • 1...Ra5
      • 2.Qxd6#
    • 1...c2
      • 2.Bxd2#
    • 1...gxf5
      • 2.Rxf5#
  • Tries
    • 1.Rc4+?
      • 1...Ke5
        • 2.Sg4#
      • 1...bxc4!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qe5#
      • 1...Sc4+
        • 2.Qd4#
      • 1...Se4+
        • 2.Sd3#
      • 1...Sxf5+
        • 2.Sd5#
      • 1...Sb7+
        • 2.Qd4#
      • 1...Sf7+
        • 2.Qd4#
      • 1...Sc8+
        • 2.Qd4#
      • 1...Se8+
        • 2.Qd4#
      • 1...Qxh8
        • 2.Sxg6#
      • 1...Qg7
        • 2.Qh4#
      • 1...c2
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 8
  • Sets
    • Q(i);N_GUARD::S(H),XP(h)
    • Q(i);N_GUARD,P_PINP(F)::S(H),XP(h)
    • R(f);N_GUARD::QAB(I),XS(g)
    • P(c);N_GUARD::B(A),XR(b)
    • P(h);OGATE,XP(F)::R1(E),XP(h)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::S(B)
      • Refutation
        • P(e);XR(E)
  • Actual
    • Q(I);N_PINS(g)
    • Threat
      • QAB1(I)
    • Vars
      • S(g);CHECK,N_GUARD::QAR2(I)
      • S(g);CHECK,SBLOCK::S(B)
      • S(g);CHECK,SBLOCK,XP(F)::S(H)
      • Q(i);N_GUARD,XQ(I)::S(H),XP(h)
      • Q(i);OGATE,P_PINS(H)::QAR2(I)
      • P(c);N_GUARD::B(A),XR(b)
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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).