MESON Chess Problem Database

Problem Display
PID: 141553 (2K1kr2/b1RR4/5p1r/8/Q4n1q/7b/8/8 w - - 0 1)

Volkmann, Albert

1st HM., Die Schwalbe 141. TT, 1967

2K1kr2/b1RR4/5p1r/8/Q4n1q/7b/8/8

#2

4 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Rd3#
      • 2.Re7#
      • 2.Rd8#
    • 1...Bg2
      • 2.Rd5#
      • 2.Re7#
      • 2.Rd8#
    • 1...Bxd7+
      • 2.Qxd7#
    • 1...Se6
      • 2.Rd4#
      • 2.Re7#
      • 2.Rd8#
    • 1...f5
      • 2.Rd6#
      • 2.Re7#
      • 2.Rd8#
  • Tries
    • 1.Qe4+?
      • 1...Se6
        • 2.Re7#
        • 2.Rd8#
      • 1...Be6!
  • Keys
    • 1.Kb7!
      • threat
        • 2.Rc8#
      • 1...Bg2+
        • 2.Rd5#
      • 1...Bxd7
        • 2.Qxd7#
      • 1...Bb6
        • 2.Qa8#
      • 1...Se6
        • 2.Rd4#
      • 1...f5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(a);CHECK,OGATE,P_SPINB(a),XR(C)::QAB1(A),XB(a)
  • Tries
    • Try
      • Q(A);CHECK
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • K(D);N_SPINR(C),S_FLIGHT
    • Threat
      • R(B)
    • Vars
      • B(a);CHECK,N_GUARD::QAB(A)+R(C)
      • B(a);OGATE,P_SPINB(a),XR(C)::QAB1(A),XB(a)
      • B(f);OGATE::QAR(A)
      • S(b);S_CUTB(a)::QAB(A)+R(C)
      • P(d);S_CUTB(a)::QAB(A)+R(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).