MESON Chess Problem Database

Problem Display
PID: 208123 (3B4/2p1N3/n1p2p2/n1P1kP2/2b3p1/p2pK1P1/QPN5/1B6 w - - 0 1)

Klark, Dmitry Vasilevich

Illustrated Sporting and Dramatic News, 1874

3B4/2p1N3/n1p2p2/n1P1kP2/2b3p1/p2pK1P1/QPN5/1B6

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bb5
      • 2.Qe6#
    • 1...Be6
      • 2.Qxe6#
    • 1...Sb4
      • 2.Bxc7#
    • 1...Sxc5
      • 2.Bxc7#
    • 1...Sb8
      • 2.Bxc7#
    • 1...axb2
      • 2.Qxb2#
  • Tries
    • 1.Qxc4?
      • threat
        • 2.Qe6#
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Sxc5
        • 2.Bxc7#
        • 2.Qd4#
        • 2.Qf4#
        • 2.Qxc5#
      • 1...Sb3
        • 2.Qe6#
        • 2.Qe4#
        • 2.Qf4#
      • 1...Sxc4+!
    • 1.Qa1?
      • threat
        • 2.bxa3#
        • 2.b3#
        • 2.b4#
      • 1...Sxc5
        • 2.Bxc7#
      • 1...axb2
        • 2.Qxb2#
      • 1...Bb3
        • 2.bxa3#
      • 1...Sb4
        • 2.Bxc7#
        • 2.bxa3#
        • 2.b3#
      • 1...a2
        • 2.b3#
        • 2.b4#
      • 1...Sb3!
    • 1.b3?
      • threat
        • 2.Qa1#
      • 1...Sxc5
        • 2.Bxc7#
      • 1...Sxb3!
  • Keys
    • 1.Sb4!
      • 1...Bxa2
        • 2.Sxd3#
      • 1...Sxb4
        • 2.Bxc7#
      • 1...Sxc5
        • 2.Bxc7#
      • 1...axb2
        • 2.Qxb2#
      • 1...Bb3
        • 2.Sxd3#
      • 1...Bb5
        • 2.Qe6#
      • 1...Bd5
        • 2.Sxd3#
      • 1...Be6
        • 2.Sxd3#
        • 2.Qxe6#
      • 1...Bf7
        • 2.Sxd3#
      • 1...Bg8
        • 2.Sxd3#
      • 1...Sb3
        • 2.Sbxc6#
      • 1...Sb7
        • 2.Sbxc6#
      • 1...Sb8
        • 2.Bxc7#
      • 1...d2
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • B(c);OGATE::QAR1(B)
    • B(c);OGATE::QAR1(B),XB(c)
    • S(g);N_GUARD::B(J),XP(j)
    • S(g);N_GUARD,XP(G)::B(J),XP(j)
    • P(a);OGATE,XP(C)::QAB(B),XP(a)
  • Tries
    • Try
      • Q(B);XB(c)
      • Threat
        • DUALS(5)
      • Refutation
        • S(e);CHECK,XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(g);N_GUARD,XP(G)::B(J),XP(j)
        • P(a);OGATE,P_SPINP(a),XP(C)::QAB(B),XP(a)
        • B(c);::QAB(B)+P(C),XP(a)
      • Refutation
        • S(e);
    • Try
      • P(C);
      • Threat
        • QAB(B)
      • Vars
        • S(g);N_GUARD,XP(G)::B(J),XP(j)
      • Refutation
        • S(e);XP(C)
  • Actual
    • S(D);
    • Vars
      • B(c);N_GUARD,XQ(B)::S(D),XP(b)
      • S(g);N_GUARD,XS(D)::B(J),XP(j)
      • S(g);N_GUARD,XP(G)::B(J),XP(j)
      • P(a);OGATE,XP(C)::QAB(B),XP(a)
      • B(c);N_GUARD::S(D),XP(b)
      • B(c);OGATE::QAR1(B)
      • S(e);N_GUARD::S(D),XP(h)
      • S(g);N_GUARD::B(J),XP(j)
      • P(b);::S(I)
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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).