MESON Chess Problem Database

Problem Display
PID: 219114 (K5nB/4R3/p5r1/R3NPp1/1p2k3/1P5N/3P1Qbr/4n2B w - - 0 1)

Clark, Cecil Henry Douglas

British Chess Magazine, 1923

K5nB/4R3/p5r1/R3NPp1/1p2k3/1P5N/3P1Qbr/4n2B

#2

11 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Sxg5#
    • 1...Rc6
      • 2.Sxg5#
    • 1...Rd6
      • 2.Sxg5#
    • 1...Re6
      • 2.Sxg5#
    • 1...Rf6
      • 2.Sxg5#
    • 1...Rh6
      • 2.Sxg5#
    • 1...Sc2
      • 2.d3#
    • 1...g4
      • 2.Qf4#
  • Tries
    • 1.Sd3+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kxd3+!
    • 1.Sf3+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3!
    • 1.Sc4+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3+!
    • 1.Sg4+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3+!
    • 1.Sc6+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3!
    • 1.Sxg6+?
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3+!
    • 1.Sd7+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3+!
    • 1.Sf7+?
      • 1...Re6
        • 2.Qe3#
        • 2.Qe2#
      • 1...Sxe7
        • 2.Qe3#
        • 2.Qe2#
      • 1...Kd3+!
    • 1.Qd4+?
      • 1...Kxf5+
        • 2.Sf3#
      • 1...Kxd4+!
    • 1.Qe2+?
      • 1...Kd4+
        • 2.Sf3#
        • 2.Sc6#
      • 1...Kxf5+!
  • Keys
    • 1.Qg3!
      • threat
        • 2.Qg4#
      • 1...Kd4+
        • 2.Sc6#
      • 1...Kxf5+
        • 2.Sf3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sf6
        • 2.Sc6#
      • 1...Sh6
        • 2.Sxg6#
      • 1...g4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::S(E),XP(f)
    • S(a);N_GUARD::P(B)
    • P(f);N_GUARD::QAR1(C)
  • Tries
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT,XS(G)
    • Try
      • S(G);CHECK,N_PINB(b)
      • Refutation
        • K(e);P_PINS(G),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);N_SPINB(b),P_PINS(G),S_FLIGHT
    • Try
      • S(G);CHECK,XR(h)
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(e);CHECK,N_SPINB(b),S_FLIGHT,XP(H)::R(F)+S(G)
      • Refutation
        • K(e);CHECK,N_SPINB(b),P-FLIGHT,XQ(C)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(e);CHECK,N_SPINB(b),S_FLIGHT,XP(H)
  • Actual
    • Q(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(e);CHECK,N_SPINB(b),P-FLIGHT::B(K)+S(G),DCHECK
      • K(e);CHECK,N_SPINB(b),S_FLIGHT,XP(H)::R(F)+S(G)
      • S(a);N_GUARD::QAB1(C),XS(a)
      • S(i);N_GUARD,S_CUTR(h)::R(I)+S(G)
      • S(i);N_GUARD::R(I)+S(G),XR(h)
      • P(f);N_GUARD::QAR1(C)
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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).