MESON Chess Problem Database

Problem Display
PID: 174136 (Kn3QN1/1n1p4/2k1p1R1/B5p1/P1B2b2/3P4/6pq/8 w - - 0 1)

Buchner, Richard

Arbeiter Schachzeitung, 1926

Kn3QN1/1n1p4/2k1p1R1/B5p1/P1B2b2/3P4/6pq/8

#2

8 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Bb5#
    • 1...d6
      • 2.Qc8#
  • Tries
    • 1.Rxe6+?
      • 1...Bd6
        • 2.Qc8#
      • 1...Sd6
        • 2.Qc8#
      • 1...d6
        • 2.Qc8#
      • 1...dxe6!
    • 1.Qb4?
      • threat
        • 2.Se7#
        • 2.Qb6#
      • 1...Sc5
        • 2.Qb6#
      • 1...d5
        • 2.Bb5#
      • 1...d6
        • 2.Qb5#
      • 1...g1Q
        • 2.Se7#
      • 1...g1B
        • 2.Se7#
      • 1...Qg1
        • 2.Se7#
      • 1...Qh7
        • 2.Qb6#
      • 1...Be3
        • 2.Se7#
      • 1...Bd6
        • 2.Qb5#
        • 2.Qb6#
      • 1...Bc7
        • 2.Se7#
      • 1...Sxa5!
    • 1.Qc8+?
      • 1...Kd6
        • 2.Qc7#
      • 1...Bc7!
  • Keys
    • 1.d4!
      • threat
        • 2.d5#
      • 1...Sxa5
        • 2.Qc5#
      • 1...d5
        • 2.Bb5#
      • 1...d6
        • 2.Qc8#
      • 1...Bd6
        • 2.Qf3#
      • 1...Sd6
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(h);SBLOCK::B(C)
    • P(h);N_SPINP(f),SBLOCK,S_CUTB(c)::QAR2(G)
  • Tries
    • Try
      • R(E);CHECK,XP(f)
      • Vars
        • B(c);P_SPINB(c)::QAR2(G)
        • S(g);P_SPINS(g)::QAR2(G)
        • P(h);P_SPINP(h)::QAR2(G)
      • Refutation
        • P(h);XR(E)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);::QAR1(G)
        • P(h);SBLOCK::B(C)
        • P(h);N_SPINP(f),SBLOCK::QAB1(G)
        • P(a);::S(H)
        • Q(b);::S(H)
        • Q(b);::QAR1(G)
        • B(c);::S(H)
      • Refutation
        • S(g);XB(D)
    • Try
      • Q(G);CHECK
      • Vars
        • K(e);P-FLIGHT::QAB1(G)
      • Refutation
        • B(c);P_SPINB(c)
  • Actual
    • P(A);
    • Threat
      • P(A)
    • Vars
      • S(g);N_GUARD,XB(D)::QAR1(G)
      • P(h);SBLOCK::B(C)
      • P(h);N_SPINP(f),SBLOCK,S_CUTB(c)::QAR2(G)
      • B(c);N_SPINP(f),OGATE,SBLOCK::QAB(G)
      • S(g);N_SPINP(f),SBLOCK::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).