MESON Chess Problem Database

Problem Display
PID: 169970 (8/8/6Q1/8/8/5Kp1/7b/3N1k1r w - - 0 1)

Lincoln, Robert A

StrateGems, 2017

8/8/6Q1/8/8/5Kp1/7b/3N1k1r

#2

3 + 4

SOLUTION

  • SOUND
  • Tries
    • 1.Sb2?
      • threat
        • 2.Qb1#
      • 1...Kg1
        • 2.Qb1#
      • 1...Ke1!
    • 1.Sf2?
      • threat
        • 2.Qb1#
      • 1...Kg1
        • 2.Qb1#
      • 1...Ke1!
    • 1.Sc3?
      • threat
        • 2.Qb1#
      • 1...Kg1
        • 2.Qb1#
      • 1...Ke1!
    • 1.Se3+?
      • 1...Kg1
        • 2.Qb1#
      • 1...Ke1!
    • 1.Qb1?
      • threat
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Kg1
        • 2.Sb2#
        • 2.Sf2#
        • 2.Sc3#
        • 2.Se3#
      • 1...Ke1!
    • 1.Qd3+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1!
    • 1.Qe4?
      • 1...Kg1
        • 2.Qe1#
      • 1...Rg1
        • 2.Qe2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2!
    • 1.Qe8?
      • 1...Kg1
        • 2.Qe1#
      • 1...Rg1
        • 2.Qe2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2!
    • 1.Qa6+?
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1!
    • 1.Qe6?
      • 1...Kg1
        • 2.Qe1#
      • 1...Rg1
        • 2.Qe2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2!
  • Keys
    • 1.Qc2!
      • 1...Ke1
        • 2.Qe2#
      • 1...Kg1
        • 2.Qg2#
      • 1...Rg1
        • 2.Qe2#
      • 1...Bg1
        • 2.Qe2#
      • 1...g2
        • 2.Qf2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(d)::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(d)::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);
      • Threat
        • QAR(C)
      • Vars
        • K(a);P-FLIGHT,P_SPINP(d)::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINP(d)::QAR(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Threat
        • DUALS(4)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • R(b);SBLOCK::QAB1(C)
        • B(c);SBLOCK::QAB1(C)
      • Refutation
        • P(d);
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • R(b);SBLOCK::QAB1(C)
        • B(c);SBLOCK::QAB1(C)
      • Refutation
        • P(d);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(C)
        • R(b);SBLOCK::QAB1(C)
        • B(c);SBLOCK::QAB1(C)
      • Refutation
        • P(d);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT::QAR1(C)
      • R(b);SBLOCK::QAB1(C)
      • B(c);SBLOCK::QAB1(C)
      • P(d);N_GUARD::QAR1(C)
HTML5 logo

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).