MESON Chess Problem Database

Problem Display
PID: 200012 (K4B2/p1Q2n2/8/3k1P2/2p2nr1/r4P2/2N5/q2B2b1 w - - 0 1)

Sokka, Hannu Erkki Juhani

Suomen Shakki, 1990

K4B2/p1Q2n2/8/3k1P2/2p2nr1/r4P2/2N5/q2B2b1

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Sb4#
    • 1...Qe5
      • 2.Qb7#
    • 1...Re3
      • 2.Qc5#
    • 1...Rxf3
      • 2.Bxf3#
    • 1...Bh2
      • 2.Qc5#
    • 1...Bd4
      • 2.Sb4#
    • 1...Bc5
      • 2.Qxc5#
    • 1...Se5
      • 2.Qd6#
    • 1...Sg5
      • 2.Qd6#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sh6
      • 2.Qd6#
    • 1...Sd8
      • 2.Qd6#
    • 1...Sh8
      • 2.Qd6#
  • Tries
    • 1.Qd7+?
      • 1...Sd6
        • 2.Qxd6#
      • 1...Ke5!
    • 1.Qxf7+?
      • 1...Kc6
        • 2.Qb7#
      • 1...Se6
        • 2.Qxe6#
      • 1...Ke5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qe4#
      • 1...Kc6
        • 2.Qb7#
      • 1...Rxf3
        • 2.Bxf3#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Qd4
        • 2.Sb4#
      • 1...Qe5
        • 2.Qb7#
      • 1...Re3
        • 2.Qc5#
      • 1...Se2
        • 2.Qe6#
      • 1...Sg2
        • 2.Qe6#
      • 1...Sd3
        • 2.Qe6#
      • 1...Sh3
        • 2.Qe6#
      • 1...Sh5
        • 2.Qe6#
      • 1...Sg6
        • 2.Qe6#
      • 1...Se5
        • 2.Qd6#
      • 1...Sg5
        • 2.Qd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 6
  • Sets
    • Q(a);SBLOCK::S(B)
    • Q(a);SBLOCK::QAB(E)
    • R(c);S_CUTB(b)::QAR1(E)
    • R(c);OGATE,XP(C)::B(A),XR(c)
    • B(b);N_GUARD::QAR1(E)
    • B(b);SBLOCK::S(B)
    • B(b);N_GUARD::QAR1(E),XB(b)
    • S(i);N_GUARD::QAR1(E)
    • S(i);N_GUARD::QAR1(E),XS(i)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR1(E),XS(i)
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • Q(E);CHECK,XS(i)
      • Vars
        • K(g);S_FLIGHT::QAB1(E)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(E),XS(e)
      • Refutation
        • K(g);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB1(E)
    • Vars
      • K(g);S_FLIGHT::QAB1(E)
      • R(c);OGATE,XP(C)::B(A),XR(c)
      • S(e);N_GUARD::QAB1(E),XS(e)
      • S(i);N_GUARD::QAR1(E),XS(i)
      • Q(a);SBLOCK::S(B)
      • Q(a);SBLOCK::QAB(E)
      • R(c);S_CUTB(b)::QAR1(E)
      • S(e);N_GUARD::QAB1(E)
      • S(i);N_GUARD::QAR1(E)
HTML5 logo

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).