MESON Chess Problem Database

Problem Display
PID: 175624 (8/2K5/4p3/4P2Q/1pPpk3/5RBP/4p2n/4bN1r w - - 0 1)

Mach, Julius Zdenek

Bohemia, 1900

8/2K5/4p3/4P2Q/1pPpk3/5RBP/4p2n/4bN1r

#2

8 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Sxd2#
    • 1...Bf2
      • 2.Sd2#
    • 1...Bxg3
      • 2.Sd2#
      • 2.Sxg3#
    • 1...Sxf1
      • 2.Qg4#
    • 1...Sxf3
      • 2.Qg6#
      • 2.Qh7#
    • 1...Sg4
      • 2.Qxg4#
    • 1...d3
      • 2.Rf4#
  • Tries
    • 1.Sxh2?
      • threat
        • 2.Qg4#
        • 2.Qg6#
        • 2.Qh4#
        • 2.Qh7#
      • 1...Rxh2
        • 2.Qg4#
      • 1...d3
        • 2.Qg4#
        • 2.Qh4#
      • 1...Bd2
        • 2.Qg6#
        • 2.Qh7#
      • 1...Bxg3!
    • 1.Qf7?
      • threat
        • 2.Qf4#
      • 1...Sxf3
        • 2.Qg6#
        • 2.Qh7#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Bxg3!
    • 1.Qh4+?
      • 1...Sg4
        • 2.Qxg4#
      • 1...Kxf3!
    • 1.Qg5?
      • threat
        • 2.Qf4#
      • 1...Bxg3
        • 2.Sd2#
      • 1...Sxf3
        • 2.Qg6#
      • 1...Bd2
        • 2.Sxd2#
      • 1...Kxf3!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Qa8#
      • 1...Kxf3
        • 2.Qa8#
      • 1...Bxg3
        • 2.Sd2#
      • 1...Sxf3
        • 2.Qh7#
      • 1...d3
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD::S(A),XB(a)
    • B(a);N_GUARD::S(A)
    • S(d);N_GUARD,XS(A)::QAR2(G)
    • S(d);N_GUARD::QAR2(G),XS(d)
    • P(f);SBLOCK::R1(B)
  • Tries
    • Try
      • S(A);XS(d)
      • Threat
        • DUALS(4)
      • Vars
        • R(b);XS(A)::QAR2(G)
      • Refutation
        • B(a);P_PINP(F),XB(C)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(a);N_GUARD::S(A),XB(a)
      • Refutation
        • B(a);P_PINP(F),XB(C)
    • Try
      • Q(G);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAR2(G),XS(d)
      • Refutation
        • K(g);S_FLIGHT,XR(B)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(a);N_GUARD,P_PINP(F),XB(C)::S(A)
        • S(d);SBLOCK,XR(B)::QAB(G)
        • B(a);N_GUARD::S(A),XB(a)
      • Refutation
        • K(g);S_FLIGHT,XR(B)
  • Actual
    • Q(G);
    • Threat
      • QAB(G)
    • Vars
      • K(g);S_FLIGHT,XR(B)::QAB(G)
      • B(a);N_GUARD,P_PINP(F),XB(C)::S(A)
      • S(d);SBLOCK,XR(B)::QAB(G)
      • P(f);SBLOCK::R1(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).