MESON Chess Problem Database

Problem Display
PID: 90227 (7K/4N3/4P3/3bpp2/3nk2p/3Np1n1/2P1R1PB/Q2R4 w - - 0 1)

Buchwald, Julius

Die Schwalbe, 1949

7K/4N3/4P3/3bpp2/3nk2p/3Np1n1/2P1R1PB/Q2R4

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sf1
      • 2.Sf2#
      • 2.Sc5#
    • 1...Sh1
      • 2.Sc5#
    • 1...Sgxe2
      • 2.Sc5#
    • 1...Sh5
      • 2.Sf2#
      • 2.Sc5#
    • 1...Sxc2
      • 2.Qxe5#
    • 1...Sdxe2
      • 2.Qxe5#
    • 1...Sb3
      • 2.Qxe5#
    • 1...Sb5
      • 2.Qxe5#
    • 1...Sxe6
      • 2.Qxe5#
    • 1...f4
      • 2.Sf2#
      • 2.Sc5#
  • Tries
    • 1.Sg8?
      • threat
        • 2.Sf6#
      • 1...Sh5
        • 2.Sf2#
        • 2.Sc5#
      • 1...f4!
    • 1.Bxg3?
      • threat
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sxe2
        • 2.Sc5#
        • 2.Qxe5#
      • 1...Sxe6
        • 2.Sf2#
        • 2.Qxe5#
      • 1...Sb3
        • 2.Sf2#
        • 2.Qxe5#
      • 1...hxg3!
    • 1.Rde1?
      • threat
        • 2.Rxe3#
      • 1...Sgxe2
        • 2.Sc5#
      • 1...Sdxe2
        • 2.Qxe5#
      • 1...Sf1
        • 2.Sf2#
        • 2.Sc5#
      • 1...f4
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sxc2!
    • 1.Qa5?
      • threat
        • 2.Qxd5#
      • 1...Bxe6
        • 2.Qxe5#
      • 1...Ba2
        • 2.Qxe5#
      • 1...Bb3
        • 2.Qxe5#
      • 1...Bc4
        • 2.Qxe5#
      • 1...Bc6
        • 2.Qxe5#
      • 1...Bb7
        • 2.Qxe5#
      • 1...Ba8
        • 2.Qxe5#
      • 1...Sb5!
  • Keys
    • 1.Rf1!
      • threat
        • 2.Sc5#
      • 1...Sxe6
        • 2.Qxe5#
      • 1...Sb3
        • 2.Qxe5#
      • 1...Sf3
        • 2.gxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(b);::S(G)
    • S(b);N_SPINP(a),XR(D)::S(G)
    • S(c);OGATE,XP(C)::QAR1(A),XP(g)
    • S(c);N_SPINP(a),OGATE,XR(D)::QAR1(A),XP(g)
    • S(c);OGATE::QAR1(A),XP(g)
    • S(c);OGATE,XP(H)::QAR1(A),XP(g)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Refutation
        • P(h);
    • Try
      • B(F);XS(b)
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);XB(F)
    • Try
      • R(B);
      • Threat
        • R1(D),XP(a)
      • Vars
        • S(b);N_SPINP(a),XR(D)::S(G)
        • S(c);N_SPINP(a),OGATE,XR(D)::QAR1(A),XP(g)
      • Refutation
        • S(c);XP(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XB(f)
      • Vars
        • B(f);OGATE,XP(H)::QAR1(A),XP(g)
        • B(f);OGATE::QAR1(A),XP(g)
      • Refutation
        • S(c);
  • Actual
    • R(B);
    • Threat
      • S(G)
    • Vars
      • S(c);OGATE,XP(H)::QAR1(A),XP(g)
      • S(c);OGATE::QAR1(A),XP(g)
      • S(c);OGATE::P(E),XS(c)
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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).