MESON Chess Problem Database

Problem Display
PID: 190046 (k7/2B1pK1p/1PP1Pb2/8/2p4r/1P1r4/8/5Q2 w - - 0 1)

Ferber, Eugene

Deutsche Schachblatter, 1913

k7/2B1pK1p/1PP1Pb2/8/2p4r/1P1r4/8/5Q2

#2

7 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3
      • 2.Qa1#
    • 1...Rdd4
      • 2.Qa1#
    • 1...Rhd4
      • 2.Qa1#
    • 1...Ba1
      • 2.Qxa1#
    • 1...Bg5
      • 2.Qa1#
  • Tries
    • 1.Qf2?
      • threat
        • 2.Qa2#
        • 2.b7#
      • 1...cxb3
        • 2.b7#
      • 1...Rd2
        • 2.b7#
      • 1...Re3
        • 2.Qa2#
      • 1...Rdd4
        • 2.Qa2#
      • 1...Rd5
        • 2.b7#
      • 1...Rh2
        • 2.b7#
      • 1...Rhd4
        • 2.Qa2#
      • 1...Rh5
        • 2.b7#
      • 1...Bb2
        • 2.b7#
      • 1...Bc3
        • 2.b7#
      • 1...Bd4
        • 2.Qa2#
      • 1...c3
        • 2.b7#
      • 1...Rxb3!
  • Keys
    • 1.Qg1!
      • threat
        • 2.b7#
      • 1...Rxb3
        • 2.Qg8#
      • 1...Re3
        • 2.Qg8#
      • 1...Rdd4
        • 2.Qa1#
      • 1...Rhd4
        • 2.Qa1#
      • 1...Bd4
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(a);S_CUTB(d)::QAB(A)
    • R(c);S_CUTB(d)::QAB(A)
    • B(d);N_GUARD::QAB(A),XB(d)
    • B(d);N_GUARD::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(B)::P(C)
        • R(a);::P(C)
        • R(a);::QAR(A)
        • R(c);::P(C)
        • R(c);::QAR(A)
        • B(d);::P(C)
        • B(d);::QAR(A)
        • P(b);::P(C)
      • Refutation
        • R(a);XP(B)
  • Actual
    • Q(A);
    • Threat
      • P(C)
    • Vars
      • R(a);N_GUARD,XP(B)::QAR(A)
      • R(a);N_GUARD::QAR(A)
      • R(a);S_CUTB(d)::QAB(A)
      • R(c);S_CUTB(d)::QAB(A)
      • B(d);S_CUTR(a)::QAR(A)
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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).