MESON Chess Problem Database

Problem Display
PID: 90812 (3N4/6q1/ppb5/rk1nn2Q/r1p1N1p1/P2P4/1b6/1RRBB2K w - - 0 1)

Holladay, Edgar Dinwiddie

Die Schwalbe, 1949

3N4/6q1/ppb5/rk1nn2Q/r1p1N1p1/P2P4/1b6/1RRBB2K

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4
      • 2.dxc4#
    • 1...cxd3
      • 2.Sd6#
  • Tries
    • 1.Rxb2+?
      • 1...Sb4
        • 2.dxc4#
      • 1...Rb4!
  • Keys
    • 1.Se6!
      • threat
        • 2.Sd6#
        • 2.Sd4#
      • 1...Sxd3
        • 2.Sd6#
      • 1...cxd3
        • 2.Sd6#
      • 1...Bb7
        • 2.Sd4#
      • 1...Bd7
        • 2.Sd4#
      • 1...Ba8
        • 2.Sd4#
      • 1...Be8
        • 2.Sd4#
      • 1...Qf8
        • 2.Sd4#
      • 1...Qc7
        • 2.Sd4#
      • 1...Qd7
        • 2.Sd4#
      • 1...Qe7
        • 2.Sd4#
      • 1...Rb4
        • 2.Sd6#
      • 1...Sc3
        • 2.Sd4#
      • 1...Se3
        • 2.Sd4#
      • 1...Sb4
        • 2.dxc4#
      • 1...Sf4
        • 2.Sd4#
      • 1...Sf6
        • 2.Sd4#
      • 1...Sc7
        • 2.Sd4#
      • 1...Se7
        • 2.Sd4#
        • 2.Sc7#
      • 1...Sf3
        • 2.Sd6#
      • 1...Sg6
        • 2.Sd6#
      • 1...Sd7
        • 2.Sd6#
        • 2.Sc7#
      • 1...Sf7
        • 2.Sc7#
      • 1...c3
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 19
    • REMOVED MATES = 0
  • Sets
    • S(g);N_SPINB(a),P_PINS(H),P_SPINS(h),S_CUTR(b)::P(G),XP(c)
    • P(c);XP(G)::S(H)
  • Tries
    • Try
      • R(A);CHECK,XB(a)
      • Vars
        • S(g);P_PINS(H),P_SPINS(g)::P(G),XP(c)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • S(J);
    • Threat
      • DUALS(2)
    • Vars
      • S(h);P_SPINS(g),XP(G)::S(H)
      • P(c);XP(G)::S(H)
      • B(k);::S(J)
      • Q(l);::S(J)
      • R(b);N_SPINB(a)::S(H)
      • S(g);P_PINS(H),P_SPINS(h)::S(J)
      • S(g);N_SPINB(a),P_PINS(H),P_SPINS(h),S_CUTR(b)::P(G),XP(c)
      • S(h);P_SPINS(g)::S(H)
      • S(h);P_SPINS(g),S_CUTQ(l)::S(J)
      • P(c);::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).