MESON Chess Problem Database

Problem Display
PID: 205679 (1K6/B1N5/8/8/1k6/8/P5Q1/3N4 w - - 0 1)

Exner, Klaus

Badische Neueste Nachrichten, 1998

1K6/B1N5/8/8/1k6/8/P5Q1/3N4

#2

6 + 1

5454 Near Snap 2020
15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qe4#
  • Tries
    • 1.Sb2?
      • 1...Kc3
        • 2.Sd5#
      • 1...Ka5
        • 2.Qd2#
      • 1...Ka3!
    • 1.Bc5+?
      • 1...Ka4
        • 2.Qa8#
      • 1...Kc4
        • 2.Qd5#
        • 2.Qc2#
      • 1...Ka5
        • 2.Qa8#
      • 1...Kxc5!
    • 1.Qf3?
      • 1...Kc4
        • 2.Qe4#
        • 2.Qb3#
        • 2.Qc3#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka4!
    • 1.Qh3?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qc3#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka4!
    • 1.Qd5?
      • 1...Ka3
        • 2.Qb3#
        • 2.Qa5#
      • 1...Ka4!
    • 1.Qc6?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
    • 1.Qb7+?
      • 1...Ka3
        • 2.Qb3#
      • 1...Kc4
        • 2.Qe4#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka4!
    • 1.Qb2+?
      • 1...Kc4
        • 2.Qc3#
        • 2.Qd4#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Ka5
        • 2.Qa3#
        • 2.Qb5#
      • 1...Ka4!
    • 1.Qc2?
      • 1...Ka3
        • 2.Bc5#
        • 2.Qb3#
      • 1...Ka5!
    • 1.Qd2+?
      • 1...Ka3
        • 2.Qa5#
      • 1...Kc4
        • 2.Sb2#
        • 2.Se3#
        • 2.Qc3#
        • 2.Qd4#
      • 1...Ka4!
    • 1.Qg3?
      • 1...Kc4
        • 2.Qb3#
        • 2.Qc3#
      • 1...Ka5
        • 2.Qa3#
      • 1...Ka4!
    • 1.Qg5?
      • 1...Ka3
        • 2.Qa5#
      • 1...Kc4
        • 2.Qb5#
      • 1...Ka4!
  • Keys
    • 1.Qa8!
      • 1...Ka3
        • 2.Bc5#
      • 1...Ka4
        • 2.Bc5#
      • 1...Kc4
        • 2.Qe4#
      • 1...Ka5
        • 2.Bc5#

Anticipated by 1940(1856), 230682(1898), 198315(1920)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR2(C)
  • Tries
    • Try
      • S(A);
      • Vars
        • K(a);S_FLIGHT::S(E)
        • K(a);S_FLIGHT::QAB(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR(C)
        • K(a);S_FLIGHT::QAR(C)
      • Refutation
        • K(a);S_FLIGHT,XB(D)
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(C)
        • K(a);S_FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);S_FLIGHT::QAR2(C)
        • K(a);P-FLIGHT::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(a);S_FLIGHT::QAR(C)+B(D),DCHECK
      • K(a);P-FLIGHT::QAR(C)+B(D)
      • K(a);P-FLIGHT::QAR2(C)
      • K(a);S_FLIGHT::QAR(C)+B(D)
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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).