MESON Chess Problem Database

Problem Display
PID: 166080 (k7/1N1N4/1K6/8/5p2/7n/5n1Q/8 w - - 0 1)

Riebe, Hans

Troll, 2017

k7/1N1N4/1K6/8/5p2/7n/5n1Q/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Qa2#
    • 1...Sh1
      • 2.Qa2#
    • 1...Sd3
      • 2.Qa2#
    • 1...Se4
      • 2.Qa2#
    • 1...Sg4
      • 2.Qa2#
    • 1...Sg1
      • 2.Qh8#
    • 1...Sg5
      • 2.Qh8#
    • 1...f3
      • 2.Qb8#
  • Tries
    • 1.Sd6?
      • 1...Sd1
        • 2.Qa2#
      • 1...Sh1
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
      • 1...Se4
        • 2.Qa2#
      • 1...Sg4
        • 2.Qa2#
      • 1...Sg1
        • 2.Qh8#
      • 1...Sg5
        • 2.Qh8#
      • 1...f3!
    • 1.Qg1?
      • threat
        • 2.Qa1#
        • 2.Qg8#
      • 1...Sd1
        • 2.Qg8#
      • 1...Sg4
        • 2.Qa1#
      • 1...Sg5
        • 2.Qa1#
      • 1...Sxg1!
    • 1.Qg3?
      • threat
        • 2.Qa3#
        • 2.Qg8#
      • 1...Sd3
        • 2.Qg8#
      • 1...Sg4
        • 2.Qa3#
      • 1...Sg5
        • 2.Qa3#
      • 1...f3
        • 2.Qb8#
        • 2.Qg8#
      • 1...fxg3!
    • 1.Qxf4?
      • threat
        • 2.Qb8#
        • 2.Qa4#
        • 2.Qf8#
      • 1...Se4
        • 2.Qb8#
        • 2.Qf8#
      • 1...Sxf4!
    • 1.Qg2?
      • threat
        • 2.Qg8#
      • 1...Sg4
        • 2.Qa2#
      • 1...Sg5!
    • 1.Qxh3?
      • threat
        • 2.Qa3#
        • 2.Qh8#
      • 1...Sd3
        • 2.Qh8#
      • 1...f3
        • 2.Qh8#
      • 1...Sxh3!
  • Keys
    • 1.Sbc5!
      • 1...Sd1
        • 2.Qa2#
      • 1...Sh1
        • 2.Qa2#
      • 1...Sd3
        • 2.Qa2#
      • 1...Se4
        • 2.Qa2#
      • 1...Sg4
        • 2.Qa2#
      • 1...Sg1
        • 2.Qh8#
      • 1...Sg5
        • 2.Qh8#
      • 1...f3
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::QAR(A)
    • S(b);OGATE::QAB1(A)
    • P(c);OGATE::QAR1(A)
  • Tries
    • Try
      • S(C);
      • Vars
        • S(a);OGATE::QAR(A)
        • S(b);OGATE::QAB1(A)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR(A)
        • S(a);::QAB(A)
        • S(b);::QAB(A)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAR(A)
        • S(b);::QAR(A)
      • Refutation
        • P(c);XQ(A)
    • Try
      • Q(A);XP(c)
      • Threat
        • DUALS(3)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • S(a);OGATE::QAR(A)
      • Refutation
        • S(b);
    • Try
      • Q(A);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB1(A)
        • P(c);::QAB1(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(C);
    • Vars
      • S(a);OGATE::QAR(A)
      • S(b);OGATE::QAB1(A)
      • P(c);OGATE::QAR1(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).