MESON Chess Problem Database

Problem Display
PID: 226845 (B5K1/Q4R2/2N3p1/4N3/1PP1k3/2p1q2R/2nbp3/6Bb w - - 0 1)

Ringqvist, Bengt

Tidskrift for Schack, 1978

B5K1/Q4R2/2N3p1/4N3/1PP1k3/2p1q2R/2nbp3/6Bb

#2

10 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sce5#
      • 1...Kd3
        • 2.Sce5#
      • 1...Qxa7
        • 2.Sxa7#
      • 1...Sxb4
        • 2.Sxb4#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qd3
        • 2.Sd4#
        • 2.Sc5#
      • 1...Sd4
        • 2.Sc5#
      • 1...Qb6!
    • 1.Rxe3+?
      • 1...Sxe3
        • 2.Qd4#
      • 1...Bxe3!
    • 1.Qc5?
      • threat
        • 2.Sd4#
        • 2.Sa5#
        • 2.Sa7#
        • 2.Se7#
        • 2.Sb8#
        • 2.Sd8#
        • 2.Qd5#
      • 1...Sxb4
        • 2.Sxb4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qd3
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
        • 2.Qd5#
      • 1...Qxc5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sce5#
      • 1...Kxd3
        • 2.Se5#
      • 1...Qxa7
        • 2.Sxa7#
      • 1...Qxd3
        • 2.Qe7#
      • 1...Sxb4
        • 2.Scxb4#
      • 1...Qd4
        • 2.Sxd4#
      • 1...Qc5
        • 2.Sxc5#
      • 1...Qb6
        • 2.Qe7#
      • 1...Sd4
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Threat
        • B(I)+S(F)
      • Vars
        • K(g);P_SPINQ(f),S_FLIGHT::S(F)
        • Q(f);XQ(G)::B(I)+S(F),XQ(f)
        • S(b);XP(C)::B(I)+S(F),XS(b)
        • Q(f);N_GUARD::S(E),XQ(f)
        • Q(f);::B(I)+S(F),XQ(f)
        • S(b);S_CUTQ(f)::S(E)
      • Refutation
        • Q(f);
    • Try
      • R(B);CHECK,XQ(f)
      • Vars
        • S(b);XR(B)::QAR1(G)
      • Refutation
        • B(c);XR(B)
    • Try
      • Q(G);
      • Threat
        • DUALS(7)
      • Vars
        • S(b);XP(C)::B(I)+S(F),XS(b)
        • Q(f);::B(I)+S(F),XQ(f)
        • Q(f);::B(I)+S(F)
      • Refutation
        • Q(f);XQ(G)
  • Actual
    • S(E);
    • Threat
      • B(I)+S(F)
    • Vars
      • K(g);P_SPINQ(f),S_FLIGHT,XS(E)::S(F)
      • Q(f);XQ(G)::B(I)+S(F),XQ(f)
      • Q(f);XS(E)::QAR(G)
      • S(b);XP(C)::B(I)+S(F),XS(b)
      • Q(f);::B(I)+S(F),XQ(f)
      • Q(f);N_GUARD::S(E),XQ(f)
      • Q(f);::QAR(G)
      • S(b);S_CUTQ(f)::S(E)
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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).