MESON Chess Problem Database

Problem Display
PID: 276055 (K3R3/p2rP3/5R2/1pp2Pp1/P1QPkPrn/2p4N/3bB3/3N1n1b w - - 0 1)

Schulz, Carl

Die Schwalbe, 1933

K3R3/p2rP3/5R2/1pp2Pp1/P1QPkPrn/2p4N/3bB3/3N1n1b

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4
      • 2.Sxg5#
    • 1...Rxd4
      • 2.Qe6#
    • 1...Rd5
      • 2.Qd3#
    • 1...Rxe7
      • 2.Rxe7#
    • 1...Rd8+
      • 2.exd8Q#
      • 2.exd8S#
      • 2.exd8B#
      • 2.exd8R#
    • 1...Bf3
      • 2.Bd3#
    • 1...Be3
      • 2.Sxc3#
    • 1...Bxf4
      • 2.Shf2#
    • 1...Se3
      • 2.Sdf2#
    • 1...Sf3
      • 2.Bd3#
    • 1...Sxf5
      • 2.Re6#
    • 1...bxa4
      • 2.d5#
    • 1...b4
      • 2.d5#
    • 1...cxd4
      • 2.Qe6#
    • 1...gxf4
      • 2.Shf2#
  • Tries
    • 1.dxc5+?
      • 1...Rd4
        • 2.Qe6#
      • 1...bxc4!
  • Keys
    • 1.axb5!
      • threat
        • 2.d5#
      • 1...Rd8+
        • 2.exd8Q#
        • 2.exd8S#
        • 2.exd8B#
        • 2.exd8R#
      • 1...Rxf4
        • 2.Sxg5#
      • 1...Rxd4
        • 2.Qe6#
      • 1...Bxf4
        • 2.Shf2#
      • 1...Sxf5
        • 2.Re6#
      • 1...cxd4
        • 2.Qe6#
      • 1...gxf4
        • 2.Shf2#
      • 1...Rd5
        • 2.Qd3#
      • 1...Be3
        • 2.Sxc3#
      • 1...Se3
        • 2.Sdf2#
      • 1...Sf3
        • 2.Bd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD,SBLOCK,XP(G)::S(C),XP(j)
    • R(l);P_SPINR(l),SBLOCK,XP(F)::QAR2(E)
    • R(l);SBLOCK::QAB1(E)
    • R(l);OGATE,P_SPINR(l),XP(J)::R(L),XR(l)
    • B(b);SBLOCK::B(B)
    • B(c);N_GUARD,SBLOCK::S(A),XP(d)
    • B(c);SBLOCK,XP(G)::S(C)
    • S(a);SBLOCK::S(A)
    • S(g);SBLOCK::B(B)
    • S(g);SBLOCK,XP(H)::R(I)
    • P(h);N_GUARD,XP(D)::QAR(E)+P(F)
    • P(h);N_GUARD::QAR(E)+P(F)
    • P(i);P_SPINP(i),SBLOCK,XP(F)::QAR2(E)
    • P(j);SBLOCK,XP(G)::S(C)
  • Tries
    • Try
      • P(F);CHECK,XP(i)
      • Vars
        • R(l);P_SPINR(l),SBLOCK::QAR2(E)
      • Refutation
        • P(h);XQ(E)
  • Actual
    • P(D);XP(h)
    • Threat
      • QAR(E)+P(F)
    • Vars
      • R(f);N_GUARD,SBLOCK,XP(G)::S(C),XP(j)
      • R(l);P_SPINR(l),SBLOCK,XP(F)::QAR2(E)
      • B(c);SBLOCK,XP(G)::S(C)
      • S(g);SBLOCK,XP(H)::R(I)
      • P(i);P_SPINP(i),SBLOCK,XP(F)::QAR2(E)
      • P(j);SBLOCK,XP(G)::S(C)
      • R(l);SBLOCK::QAB1(E)
      • B(c);N_GUARD,SBLOCK::S(A),XP(d)
      • S(a);SBLOCK::S(A)
      • S(g);SBLOCK::B(B)
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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).