MESON Chess Problem Database

Problem Display
PID: 43380 (2R3bq/n2p3p/6B1/6R1/3k1P1Q/KPNp2p1/PN1PP2p/2r1B1bn w - - 0 1)

Clark, Cecil Henry Douglas

4th Comm., BCF 039. Ty., 1941-1942

2R3bq/n2p3p/6B1/6R1/3k1P1Q/KPNp2p1/PN1PP2p/2r1B1bn

#2

13 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qe5
      • 2.fxe5#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Bd5
      • 2.Rxd5#
    • 1...Sf2
      • 2.e3#
    • 1...Sb5+
      • 2.Sxb5#
    • 1...Sc6
      • 2.Sb5#
    • 1...Sxc8
      • 2.Sb5#
    • 1...dxe2
      • 2.Sxe2#
    • 1...hxg6
      • 2.Qxh8#
  • Tries
    • 1.Bf2+?
      • 1...Sxf2
        • 2.e3#
      • 1...gxf2
        • 2.e3#
      • 1...Bxf2!
    • 1.Qxg3?
      • threat
        • 2.Qxd3#
      • 1...Sb5+
        • 2.Sxb5#
      • 1...Rxc3
        • 2.dxc3#
      • 1...dxe2
        • 2.Sxe2#
        • 2.Qd3#
      • 1...Be3
        • 2.Qxe3#
        • 2.dxe3#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sf2
        • 2.Qe3#
        • 2.e3#
      • 1...Sxg3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.f5#
      • 1...Sb5+
        • 2.Sxb5#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Bxc4
        • 2.Rxc4#
      • 1...Sxc8
        • 2.Sb5#
      • 1...dxe2
        • 2.Sxe2#
      • 1...hxg6
        • 2.Qxh8#
      • 1...Qe5
        • 2.fxe5#
      • 1...Be3
        • 2.dxe3#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Sf2
        • 2.e3#
      • 1...Sc6
        • 2.Sb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(l);OGATE::QAR(J)+P(I),XQ(l)
    • B(k);N_GUARD::R1(M),XB(k)
    • B(k);N_GUARD::R1(K),XB(k)
    • S(c);S_CUTB(b)::P(E)
    • S(h);CHECK,N_GUARD::S(H),XS(h)
    • S(h);N_GUARD::S(H)
    • S(h);N_GUARD,XR(M)::S(H)
    • P(e);XP(E)::S(H),XP(e)
    • P(j);OGATE,XB(L)::QAB(J),XQ(l)
  • Tries
    • Try
      • B(A);CHECK
      • Vars
        • S(c);XB(A)::P(E)
        • P(f);XB(A)::P(E)
      • Refutation
        • B(b);XB(A)
    • Try
      • Q(J);XP(f)
      • Threat
        • QAR1(J),XP(e)
      • Vars
        • S(h);CHECK,N_GUARD::S(H),XS(h)
        • R(a);OGATE,P_PINP(G),XS(H)::P(D),XR(a)
        • B(k);N_GUARD::R1(M),XB(k)
      • Refutation
        • S(c);XQ(J)
  • Actual
    • S(C);
    • Threat
      • QAR(J)+P(I)
    • Vars
      • S(h);CHECK,N_GUARD::S(H),XS(h)
      • R(a);OGATE,P_PINP(G),XS(H)::P(D),XR(a)
      • B(k);OGATE,XS(C)::R1(M),XB(k)
      • S(h);N_GUARD,XR(M)::S(H)
      • P(e);XP(E)::S(H),XP(e)
      • P(j);OGATE,XB(L)::QAB(J),XQ(l)
      • Q(l);OGATE::QAR(J)+P(I),XQ(l)
      • B(b);OGATE::P(D),XB(b)
      • B(k);N_GUARD::R1(K),XB(k)
      • S(c);S_CUTB(b)::P(E)
      • S(h);N_GUARD::S(H)
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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).