MESON Chess Problem Database

Problem Display
PID: 207725 (1Q6/K7/2k1pPB1/n3p3/4N3/3bP3/8/7R w - - 0 1)

Uhler, Ekkehard

Badische Neueste Nachrichten, 1979

1Q6/K7/2k1pPB1/n3p3/4N3/3bP3/8/7R

#2

7 + 5

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Be8#
    • 1...Bb5
      • 2.Qd6#
    • 1...Sb3
      • 2.Qb7#
    • 1...Sc4
      • 2.Qb7#
    • 1...Sb7
      • 2.Qxb7#
  • Tries
    • 1.Qb6+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kd7!
    • 1.Qa8+?
      • 1...Kc7
        • 2.Rh7#
      • 1...Kd7
        • 2.Rh7#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Kb5!
    • 1.Qc8+?
      • 1...Kd5
        • 2.Qc5#
      • 1...Kb5!
    • 1.Qe8+?
      • 1...Kc7
        • 2.Rh7#
      • 1...Kd5!
  • Keys
    • 1.Rd1!
      • 1...Kd5
        • 2.Qb5#
      • 1...Kd7
        • 2.Be8#
      • 1...Bxe4
        • 2.Qb6#
      • 1...Sb7
        • 2.Qxb7#
      • 1...Bb1
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Bf1
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Bc2
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Be2
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Bc4
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Bb5
        • 2.Be8#
        • 2.Rd6#
        • 2.Qd6#
        • 2.Qb6#
        • 2.Qc8#
      • 1...Ba6
        • 2.Be8#
        • 2.Rd6#
        • 2.Qb6#
      • 1...Sb3
        • 2.Qb7#
      • 1...Sc4
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);S_FLIGHT::B(E)
    • B(a);SBLOCK::QAR1(G)
    • S(b);N_GUARD::QAB1(G)
    • S(b);N_GUARD::QAB1(G),XS(b)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);S_FLIGHT::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT::R(A)
        • K(d);S_FLIGHT::R(A)
        • S(b);N_GUARD,P_SPINS(b)::QAB1(G),XS(b)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(d);P-FLIGHT::R(A)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • R(A);
    • Vars
      • K(d);P_SPINB(a),S_FLIGHT::QAR2(G)
      • K(d);P_SPINB(a),S_FLIGHT::B(E)
      • B(a);XS(C)::QAR1(G)
      • S(b);N_GUARD::QAB1(G),XS(b)
      • S(b);N_GUARD::QAB1(G)
HTML5 logo

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).