MESON Chess Problem Database

Problem Display
PID: 258071 (N1R1b1B1/8/1pn1p1r1/1Npn4/K1k1ppRQ/P1p5/3PP2b/B7 w - - 0 1)

Segers, Marcel

Die Schwalbe, 1931

N1R1b1B1/8/1pn1p1r1/1Npn4/K1k1ppRQ/P1p5/3PP2b/B7

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sxb6#
    • 1...Sdb4
      • 2.Sxb6#
    • 1...Sf6
      • 2.Sxb6#
    • 1...Sc7
      • 2.Sxb6#
    • 1...Sde7
      • 2.Sxb6#
    • 1...cxd2
      • 2.Sd6#
    • 1...c2
      • 2.Sd6#
    • 1...e3
      • 2.d3#
    • 1...f3
      • 2.d3#
    • 1...e5
      • 2.Sxb6#
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sd6#
      • 1...Se3
        • 2.Sxb6#
      • 1...Sdb4
        • 2.Sxb6#
      • 1...Sf6
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sxb6#
      • 1...Sde7
        • 2.Sxb6#
      • 1...Scb4
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Se5
        • 2.Qd4#
      • 1...Sa7
        • 2.Qd4#
      • 1...Sce7
        • 2.Qd4#
      • 1...Sb8
        • 2.Qd4#
      • 1...Sd8
        • 2.Qd4#
      • 1...e3
        • 2.d3#
      • 1...f3
        • 2.d3#
      • 1...e5
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 2
  • Sets
    • S(g);N_GUARD,P_SPINP(j)::S(I),XP(h)
    • P(b);XP(B)::S(H)
    • P(b);::S(H)
    • P(d);N_GUARD,P_SPINP(e)::P(B)
    • P(e);P_SPINP(d)::P(B)
    • P(j);P_SPINS(g)::S(I),XP(h)
  • Actual
    • Q(G);
    • Threat
      • S(H)
    • Vars
      • S(g);N_GUARD,P_SPINP(j)::S(I),XP(h)
      • S(i);N_GUARD,P_PINS(H),P_SPINP(f)::QAR1(G)
      • S(i);N_GUARD,P_PINS(H),P_SPINP(f)::QAR1(G),XS(i)
      • P(d);N_GUARD,P_SPINP(e)::P(B)
      • P(e);P_SPINP(d)::P(B)
      • P(j);P_SPINS(g)::S(I),XP(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).