MESON Chess Problem Database

Problem Display
PID: 193963 (8/Rn1Q4/5k1N/p7/P5n1/5P2/8/K1B2R2 w - - 0 1)

Clark, WA

Brisbane Courier, 1916

8/Rn1Q4/5k1N/p7/P5n1/5P2/8/K1B2R2

#2

8 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Sxg4#
    • 1...Kg6
      • 2.Qf7#
    • 1...Sc5
      • 2.Qf5#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sd8
      • 2.Qf5#
  • Tries
    • 1.Ra6+?
      • 1...Ke5
        • 2.Sxg4#
        • 2.Sf7#
        • 2.Re6#
      • 1...Sd6!
    • 1.Qe7+?
      • 1...Kg6
        • 2.Qf7#
      • 1...Kxe7!
    • 1.fxg4+?
      • 1...Kg6
        • 2.Qf7#
      • 1...Ke5!
  • Keys
    • 1.Rg1!
      • 1...Ke5
        • 2.Sxg4#
      • 1...Kg6
        • 2.Qf7#
      • 1...Sxh6
        • 2.Bb2#
      • 1...Sf2
        • 2.Bb2#
      • 1...Sh2
        • 2.Bb2#
      • 1...Se3
        • 2.Bb2#
      • 1...Se5
        • 2.Sg8#
      • 1...Sc5
        • 2.Qf5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Sd8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(F),XS(a)
    • K(c);P-FLIGHT::QAB1(H)
    • S(d);::QAR1(H)
    • S(d);N_GUARD::QAR2(H),XS(d)
  • Tries
    • Try
      • R(G);CHECK
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(H)
      • Refutation
        • K(c);P_SPINS(d),S_FLIGHT,XQ(H)
    • Try
      • P(D);CHECK,XS(a)
      • Vars
        • K(c);P-FLIGHT::QAB1(H)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(C);
    • Vars
      • K(c);S_FLIGHT::S(F),XS(a)
      • K(c);P-FLIGHT,P_SPINS(a)::QAB1(H)
      • S(a);N_GUARD,XS(F)::B(B)
      • S(a);N_GUARD::B(B)
      • S(a);SBLOCK::S(F)
      • S(d);::QAR1(H)
      • S(d);N_GUARD::QAR2(H),XS(d)
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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).