MESON Chess Problem Database

Problem Display
PID: 101230 (8/8/3p2K1/3P3R/2P1k1P1/6n1/4p2B/4N1Q1 w - - 0 1)

Sim, Malcolm

Good Companions, 1918

8/8/3p2K1/3P3R/2P1k1P1/6n1/4p2B/4N1Q1

#2

8 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Qd4#
  • Tries
    • 1.Re5+?
      • 1...Kf4
        • 2.Qd4#
        • 2.Qxg3#
      • 1...Kxe5
        • 2.Qe3#
      • 1...dxe5!
    • 1.Rh7?
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe3#
      • 1...Sf1
        • 2.Re7#
      • 1...Sh1
        • 2.Re7#
      • 1...Sh5
        • 2.Re7#
      • 1...Sf5!
    • 1.Rh8?
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe3#
      • 1...Sf1
        • 2.Re8#
      • 1...Sh1
        • 2.Re8#
      • 1...Sh5
        • 2.Re8#
      • 1...Sf5!
    • 1.Qf2?
      • 1...Sf1
        • 2.Qf4#
      • 1...Sh1
        • 2.Qf4#
      • 1...Sf5
        • 2.Qf4#
      • 1...Sxh5!
  • Keys
    • 1.Rh4!
      • 1...Kf4
        • 2.Qd4#
      • 1...Ke5
        • 2.Qe3#
      • 1...Sf1
        • 2.g5#
      • 1...Sh1
        • 2.g5#
      • 1...Sf5
        • 2.gxf5#
      • 1...Sh5
        • 2.gxh5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT,P_SPINS(b)::QAR2(B)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b),XR(G)::QAR2(B)
      • Refutation
        • P(d);XR(G)
    • Try
      • R(G);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR2(B)
        • S(b);::R(G)
      • Refutation
        • S(b);
    • Try
      • R(G);
      • Vars
        • K(c);P-FLIGHT,P_SPINS(b)::QAR2(B)
        • S(b);::R(G)
      • Refutation
        • S(b);
    • Try
      • Q(B);
      • Vars
        • S(b);::QAR1(B)
      • Refutation
        • S(b);XR(G)
  • Actual
    • R(G);
    • Vars
      • K(c);P-FLIGHT,P_SPINS(b)::QAR2(B)
      • S(b);::R(G)+P(E)
      • S(b);OGATE::R(G)+P(E),XS(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).