MESON Chess Problem Database

Problem Display
PID: 173781 (N4B2/5K2/Bpk5/8/1p4p1/1pq3P1/3R4/R1Q5 w - - 0 1)

Macleod, Norman Alasdair

Boletim da UBP, 1984

N4B2/5K2/Bpk5/8/1p4p1/1pq3P1/3R4/R1Q5

#2

8 + 6

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Rxc1#
    • 1...Qc4+
      • 2.Qxc4#
    • 1...Qc5
      • 2.Rd6#
  • Tries
    • 1.Bxb4?
      • threat
        • 2.Rd6#
        • 2.Qxc3#
      • 1...Qc4+
        • 2.Qxc4#
      • 1...Qxc1
        • 2.Rxc1#
        • 2.Rd6#
      • 1...Qc2
        • 2.Rd6#
      • 1...Qc5!
    • 1.Rd4?
      • threat
        • 2.Qh6#
      • 1...Qc4+
        • 2.Qxc4#
      • 1...Qxc1
        • 2.Rxc1#
      • 1...Qc5
        • 2.Rd6#
      • 1...Qc2!
  • Keys
    • 1.Rd3!
      • threat
        • 2.Qh1#
      • 1...Qc4+
        • 2.Qxc4#
      • 1...Qxc1
        • 2.Rxc1#
      • 1...Qc2
        • 2.Qh6#
      • 1...Qc5
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_SPINQ(b),OGATE,XQ(B)::R(A),XQ(b)
    • Q(b);CHECK,OGATE::QAR2(B),XQ(b)
    • Q(b);::R1(C)
  • Tries
    • Try
      • B(H);XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(B),XQ(b)
        • Q(b);::R1(C)
      • Refutation
        • Q(b);
    • Try
      • R(C);
      • Threat
        • QAR(B)
      • Vars
        • Q(b);CHECK,OGATE::QAR2(B),XQ(b)
        • Q(b);N_SPINQ(b),OGATE,XQ(B)::R(A),XQ(b)
        • Q(b);::R1(C)
      • Refutation
        • Q(b);
  • Actual
    • R(C);
    • Threat
      • QAB(B)
    • Vars
      • Q(b);CHECK,OGATE::QAR2(B),XQ(b)
      • Q(b);N_SPINQ(b),OGATE,XQ(B)::R(A),XQ(b)
      • Q(b);N_GUARD::QAR(B)
      • Q(b);::R1(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).