MESON Chess Problem Database

Problem Display
PID: 121625 (8/4R3/2kp3Q/K1p5/2b5/8/2N5/8 w - - 0 1)

af Hallstrom, Edvard Johannes Gabriel

Thema Danicum, 1985

8/4R3/2kp3Q/K1p5/2b5/8/2N5/8

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qh1#
  • Tries
    • 1.Qf8?
      • threat
        • 2.Qa8#
      • 1...Kd5
        • 2.Qf3#
        • 2.Qa8#
      • 1...d5
        • 2.Qh6#
        • 2.Qf6#
      • 1...Ba6!
    • 1.Qh1+?
      • 1...d5
        • 2.Qh6#
      • 1...Bd5!
  • Keys
    • 1.Qc1!
      • 1...Kd5
        • 2.Qh1#
      • 1...Bf1
        • 2.Sb4#
      • 1...Ba2
        • 2.Sb4#
      • 1...Be2
        • 2.Sb4#
      • 1...Bb3
        • 2.Sb4#
      • 1...Bd3
        • 2.Sb4#
      • 1...Bb5
        • 2.Sb4#
      • 1...Bd5
        • 2.Sb4#
        • 2.Sd4#
      • 1...Ba6
        • 2.Sb4#
      • 1...Be6
        • 2.Sb4#
      • 1...Bf7
        • 2.Sb4#
      • 1...Bg8
        • 2.Sb4#
      • 1...d5
        • 2.Qh6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINP(d),S_FLIGHT::QAB(C)
  • Tries
    • Try
      • Q(C);N_PINP(d)
      • Threat
        • QAB(C)
      • Refutation
        • B(a);
    • Try
      • Q(C);CHECK,N_PINP(d)
      • Vars
        • P(d);OGATEB,P_SPINP(d),SBLOCK::QAR(C)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • Q(C);N_PINP(d)
    • Vars
      • K(c);S_FLIGHT::QAB(C)
      • B(a);S_CUTP(b)::S(A)
      • P(d);OGATEB,SBLOCK::QAR(C)
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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).