MESON Chess Problem Database

Problem Display
PID: 271282 (5Q1b/pp1p4/rrb5/3p3K/2Nk4/2R3p1/5n2/B2N4 w - - 0 1)

Volkmann, Albert

Die Schwalbe, 1932

5Q1b/pp1p4/rrb5/3p3K/2Nk4/2R3p1/5n2/B2N4

#2

6 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Re3#
  • Tries
    • 1.Qxf2+?
      • 1...Ke4
        • 2.Re3#
      • 1...gxf2!
    • 1.Qf4+?
      • 1...Se4
        • 2.Qe3#
      • 1...Kc5!
    • 1.Qxh8+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc5!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qxh8#
      • 1...Ke5
        • 2.Re3#
      • 1...Ba4
        • 2.Rb3#
      • 1...Bb5
        • 2.Ra3#
      • 1...Be5
        • 2.Qc5#
      • 1...Bf6
        • 2.Qxf6#
      • 1...Bg7
        • 2.Qxg7#
      • 1...Sd3
        • 2.Rc4#
      • 1...Se4
        • 2.Sf3#
      • 1...Sg4
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • K(c);N_GUARD,P-FLIGHT,S_CUTR(e),S_CUTR(f)::R1(C)
  • Tries
    • Try
      • Q(F);CHECK,XS(a)
      • Vars
        • K(c);N_GUARD,P-FLIGHT,S_CUTR(e),S_CUTR(f)::R1(C)
      • Refutation
        • P(b);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • S(a);P_SPINS(a)::QAB1(F)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(F);CHECK,XB(k)
      • Vars
        • K(c);N_GUARD,P-FLIGHT::QAR1(F)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(D);
    • Threat
      • QAB(F),XB(k)
    • Vars
      • K(c);S_FLIGHT::B(A)+R(C),DCHECK
      • B(g);S_CUTR(e)::B(A)+R(C)
      • B(g);S_CUTR(f)::B(A)+R(C)
      • B(k);SBLOCK::QAB1(F)
      • B(k);N_GUARD::QAB(F),XB(k)
      • S(a);SBLOCK::B(A)+R(C),DCHECK
      • S(a);SBLOCK::S(D)
      • S(a);N_GUARD::QAR2(F)
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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).