MESON Chess Problem Database

Problem Display
PID: 235475 (5Q2/p7/B3P3/3pP1p1/4k1P1/3N4/2p3p1/2B3Kb w - - 0 1)

Speckmann, Werner

Schach, 1964

5Q2/p7/B3P3/3pP1p1/4k1P1/3N4/2p3p1/2B3Kb

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb4#
    • 1...d4
      • 2.Qa8#
  • Tries
    • 1.Qb4+?
      • 1...d4
        • 2.Qb7#
      • 1...Kf3!
    • 1.Qc5?
      • threat
        • 2.Qe3#
      • 1...d4
        • 2.Qc6#
      • 1...Kf3!
    • 1.Qd6?
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Qc6#
      • 1...Kf3!
    • 1.Qe7?
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Qb7#
      • 1...Kf3!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Bb2#
      • 1...Kxf3!
    • 1.Qf7?
      • 1...d4
        • 2.Qb7#
      • 1...Kd4!
    • 1.Qb8?
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Qb7#
        • 2.Qa8#
      • 1...Kf3!
    • 1.e7?
      • 1...d4
        • 2.Qa8#
      • 1...Kd4!
  • Keys
    • 1.Qa3!
      • 1...Kf3
        • 2.Sf2#
      • 1...Kd4
        • 2.Qb4#
      • 1...d4
        • 2.Bb7#

There are these versions: 85769

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT::QAR2(H)
    • P(e);OGATEB,SBLOCK::QAB(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • P(e);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e)::QAR2(H)
        • P(e);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(d);P-FLIGHT::QAR2(H)
        • P(e);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(d);P-FLIGHT::B(A)
      • Refutation
        • K(d);S_FLIGHT,XQ(H)
    • Try
      • Q(H);
      • Vars
        • P(e);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(H);
      • Vars
        • K(d);P-FLIGHT::QAR2(H)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(G);
      • Vars
        • P(e);OGATEB,SBLOCK::QAB(H)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(d);S_FLIGHT::QAR(H)+S(C)
      • K(d);P-FLIGHT::QAR2(H)
      • P(e);OGATEB,SBLOCK::B(F)
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).