MESON Chess Problem Database

Problem Display
PID: 258949 (2kn4/Bbp4n/2p1R3/K1N5/pQp3R1/3q3B/8/8 w - - 0 1)

Lipton, Michael

Die Schwalbe, 1967

2kn4/Bbp4n/2p1R3/K1N5/pQp3R1/3q3B/8/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Qb8#
    • 1...Ba8
      • 2.Qb8#
  • Tries
    • 1.Rg8?
      • threat
        • 2.Qxb7#
      • 1...Qb1
        • 2.Re4#
      • 1...Qd2
        • 2.Rd6#
      • 1...Qb3
        • 2.Re3#
      • 1...Qc3
        • 2.Re3#
      • 1...Ba6
        • 2.Qb8#
      • 1...Ba8
        • 2.Qb8#
      • 1...Sf8!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qxb7#
      • 1...Qb1
        • 2.Rge4#
      • 1...Qd2
        • 2.Rd4#
      • 1...Qb3
        • 2.Rg3#
      • 1...Qc3
        • 2.Rg3#
      • 1...Ba6
        • 2.Qb8#
      • 1...Ba8
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • B(e);OGATE::QAR1(B)
  • Tries
    • Try
      • R(C);P_PINS(i)
      • Threat
        • QAB1(B),XB(e)
      • Vars
        • Q(a);N_GUARD::B(A)+R(F)
        • Q(a);N_GUARD,P_PINQ(B)::B(A)+R(F)
        • B(e);OGATE::QAR1(B)
      • Refutation
        • S(g);N_SPINS(i)
  • Actual
    • R(F);P_PINS(i)
    • Threat
      • QAB1(B),XB(e)
    • Vars
      • Q(a);N_GUARD::B(A)+R(C)
      • Q(a);N_GUARD,P_PINQ(B)::B(A)+R(C)
      • B(e);OGATE::QAR1(B)
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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).