MESON Chess Problem Database

Problem Display
PID: 16595 (2N5/8/2p4R/R2n1k2/2pPn2K/q6p/3Bb3/1B3N2 w - - 0 1)

Andersson, Gunnar

Froberg, Johan Hilding Laurentius

1st HM., Schackvarlden, 1941

2N5/8/2p4R/R2n1k2/2pPn2K/q6p/3Bb3/1B3N2

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sg3#
      • 2.Sd6#
      • 2.Se7#
    • 1...Qb2
      • 2.Sg3#
      • 2.Sd6#
      • 2.Se7#
    • 1...Qb4
      • 2.Sg3#
    • 1...Qc5
      • 2.Sg3#
    • 1...Qd6
      • 2.Sxd6#
    • 1...Qe7+
      • 2.Sxe7#
    • 1...Qf8
      • 2.Sg3#
    • 1...Qa1
      • 2.Sg3#
      • 2.Sd6#
      • 2.Se7#
    • 1...Qa2
      • 2.Sg3#
      • 2.Sd6#
      • 2.Se7#
    • 1...Qb3
      • 2.Sd6#
      • 2.Se7#
    • 1...Qc3
      • 2.Sd6#
      • 2.Se7#
    • 1...Qd3
      • 2.Se7#
    • 1...Qf3
      • 2.Sd6#
      • 2.Se7#
    • 1...Qg3+
      • 2.Sxg3#
    • 1...Qa4
      • 2.Sg3#
      • 2.Sd6#
      • 2.Se7#
    • 1...Qxa5
      • 2.Sg3#
      • 2.Sd6#
    • 1...Bf3
      • 2.Sg3#
    • 1...c3
      • 2.Sg3#
    • 1...c5
      • 2.Sd6#
  • Tries
    • 1.Rc5?
      • threat
        • 2.Sd6#
        • 2.Se7#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxc5
        • 2.Sg3#
      • 1...Qd3
        • 2.Se7#
      • 1...Qa7
        • 2.Sg3#
        • 2.Sd6#
      • 1...Bd3
        • 2.Se7#
      • 1...Qe3!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Rf6#
      • 1...Qg3+
        • 2.Sxg3#
      • 1...Qxa5
        • 2.Sg3#
        • 2.Sd6#
      • 1...Qc5
        • 2.Sg3#
      • 1...Qd6
        • 2.Se3#
        • 2.Sxd6#
      • 1...Qe7
        • 2.Se3#
        • 2.Sg3#
        • 2.Sxe7#
      • 1...Qf8
        • 2.Se3#
        • 2.Sg3#
      • 1...Qd3
        • 2.Se7#
      • 1...Bd3
        • 2.Se3#
      • 1...c5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::S(B)
    • Q(b);N_GUARD::S(H),XQ(b)
    • Q(b);CHECK,N_GUARD::S(H),XQ(b)
    • Q(b);N_GUARD,N_SPINS(e),P_SPINS(f)::S(H)
    • Q(b);CHECK,N_GUARD::S(B),XQ(b)
    • B(a);S_CUTQ(b)::S(B)
    • P(d);S_CUTQ(b)::S(B)
    • P(h);S_CUTQ(b)::S(H)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,N_GUARD::S(B),XQ(b)
        • Q(b);N_GUARD,XR(F)::S(B)
        • Q(b);N_SPINS(e),P_SPINS(f)::S(H)
        • B(a);N_SPINS(e),P_SPINS(f)::S(H)
      • Refutation
        • Q(b);
  • Actual
    • B(C);
    • Threat
      • R1(G)
    • Vars
      • Q(b);CHECK,N_GUARD::S(B),XQ(b)
      • Q(b);N_GUARD::S(B)
      • Q(b);N_GUARD,N_SPINS(e),P_SPINS(f)::S(H)
      • B(a);N_SPINS(e),P_SPINS(f),S_CUTQ(b)::S(B)
      • P(h);S_CUTQ(b)::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).