MESON Chess Problem Database

Problem Display
PID: 121490 (4r3/3Bn3/N2p1b1Q/p2k4/nr1N1Pp1/1P6/2P3K1/3R4 w - - 0 1)

Marik, Josef V

Lada, 1935

4r3/3Bn3/N2p1b1Q/p2k4/nr1N1Pp1/1P6/2P3K1/3R4

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Qe6#
    • 1...Bh4
      • 2.Qe6#
    • 1...Bg5
      • 2.Qe6#
    • 1...Bg7
      • 2.Qe6#
    • 1...Bh8
      • 2.Qe6#
    • 1...Sf5
      • 2.Bc6#
    • 1...Sc6
      • 2.Bxc6#
    • 1...Sg6
      • 2.Bc6#
    • 1...Sc8
      • 2.Bc6#
    • 1...Sg8
      • 2.Bc6#
  • Tries
    • 1.Qh7?
      • threat
        • 2.Be6#
      • 1...Rxd4
        • 2.c4#
      • 1...Sf5
        • 2.Bc6#
      • 1...Sg6
        • 2.Bc6#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Sc8
        • 2.Bc6#
      • 1...Sg8
        • 2.Bc6#
      • 1...Bxd4!
  • Keys
    • 1.Qg6!
      • threat
        • 2.Be6#
      • 1...Rxd4
        • 2.c4#
      • 1...Bxd4
        • 2.Qe6#
      • 1...Sxg6
        • 2.Bc6#
      • 1...Sf5
        • 2.Bc6#
      • 1...Sc5
        • 2.Sc7#
      • 1...Sc6
        • 2.Bxc6#
      • 1...Sc8
        • 2.Bc6#
      • 1...Sg8
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(g);OGATE,P_SPINB(g),XS(E)::QAB1(H)
    • B(g);OGATE::QAB1(H)
    • S(h);N_GUARD::B(I)
    • S(h);N_GUARD::B(I),XS(h)
  • Tries
    • Try
      • Q(H);
      • Threat
        • B(I)
      • Vars
        • R(b);N_GUARD,P_SPINR(b),XS(E)::P(B)
        • S(h);N_GUARD::B(I)
        • S(a);SBLOCK::S(G)
        • S(h);N_GUARD::B(I),XS(h)
      • Refutation
        • B(g);P_SPINB(g),XS(E)
  • Actual
    • Q(H);
    • Threat
      • B(I)
    • Vars
      • R(b);N_GUARD,P_SPINR(b),XS(E)::P(B)
      • B(g);OGATE,P_SPINB(g),XS(E)::QAB1(H)
      • S(h);N_GUARD,XQ(H)::B(I)
      • S(h);N_GUARD::B(I)
      • S(a);SBLOCK::S(G)
      • S(h);N_GUARD::B(I),XS(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).