MESON Chess Problem Database

Problem Display
PID: 186764 (B5N1/3Kp3/1p2pb2/1N2kp2/2n3b1/3p2P1/3r4/7Q w - - 0 1)

Baumann, Klaus

Troll, 2018

B5N1/3Kp3/1p2pb2/1N2kp2/2n3b1/3p2P1/3r4/7Q

#2

6 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bh8
      • 2.Qxh8#
    • 1...f4
      • 2.Qe4#
  • Tries
    • 1.Qc1?
      • threat
        • 2.Qc3#
      • 1...Rc2
        • 2.Qf4#
      • 1...f4!
    • 1.Qe1+?
      • 1...Re2
        • 2.Qc3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Be2!
    • 1.Qh6?
      • threat
        • 2.Qf4#
      • 1...f4
        • 2.Qxf4#
      • 1...Bg5
        • 2.Qxe6#
      • 1...Rf2!
  • Keys
    • 1.Qc6!
      • threat
        • 2.Qxe6#
      • 1...f4
        • 2.Qe4#
      • 1...Sd6
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • B(i);OGATEB::QAB(A),XB(i)
    • P(f);N_GUARD::QAR1(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • R(a);OGATE::QAB1(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);CHECK
      • Vars
        • R(a);OGATE,P_SPINR(a)::QAB(A)
        • S(c);N_GUARD,P_SPINS(c)::QAR2(A),XS(c)
      • Refutation
        • B(d);P_SPINB(d)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(f);::QAB1(A),XP(f)
        • B(i);OGATE::QAR1(A),XP(h)
      • Refutation
        • R(a);
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(h)
    • Vars
      • P(f);N_GUARD::QAR1(A)
      • S(c);OGATE::QAB(A)
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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).