MESON Chess Problem Database

Problem Display
PID: 152737 (2K2Q2/8/k7/2P5/1b6/N1B5/8/8 w - - 0 1)

Lincoln, Robert A

StrateGems, 2011

2K2Q2/8/k7/2P5/1b6/N1B5/8/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Qe7?
      • 1...Ka5
        • 2.Qa7#
      • 1...Bxa3
        • 2.Qb7#
      • 1...Bxc5
        • 2.Qb7#
      • 1...Ba5
        • 2.Qb7#
      • 1...Bxc3!
    • 1.Qg7?
      • 1...Ka5
        • 2.Qa7#
      • 1...Bxa3
        • 2.Qb7#
      • 1...Bxc5
        • 2.Qb7#
      • 1...Ba5
        • 2.Qb7#
      • 1...Bxc3!
    • 1.Qf1+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7!
    • 1.Qf7?
      • 1...Ka5
        • 2.Qa7#
      • 1...Bxa3
        • 2.Qb7#
      • 1...Bxc5
        • 2.Qb7#
      • 1...Ba5
        • 2.Qb7#
      • 1...Bxc3!
    • 1.Qd8?
      • threat
        • 2.Qb6#
      • 1...Bxc5
        • 2.Qa5#
      • 1...Ba5
        • 2.Qxa5#
      • 1...Ka7!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qa8#
      • 1...Ka5
        • 2.Qa8#
      • 1...Ka7
        • 2.Qb7#
      • 1...Bxa3
        • 2.Qb7#
      • 1...Bxc5
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAR2(E)
        • B(a);XS(A)::QAB1(E)
        • B(a);XP(C)::QAB1(E)
        • B(a);::QAB1(E)
      • Refutation
        • B(a);XB(B)
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAR2(E)
        • B(a);XS(A)::QAB1(E)
        • B(a);XP(C)::QAB1(E)
        • B(a);::QAB1(E)
      • Refutation
        • B(a);XB(B)
    • Try
      • Q(E);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAR2(E)
        • B(a);XS(A)::QAB1(E)
        • B(a);XP(C)::QAB1(E)
        • B(a);::QAB1(E)
      • Refutation
        • B(a);XB(B)
    • Try
      • Q(E);
      • Threat
        • QAR1(E)
      • Vars
        • B(a);N_GUARD,XP(C)::QAR1(E)
        • B(a);N_GUARD::QAR1(E),XB(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR2(E)
    • Vars
      • K(b);P-FLIGHT,P_SPINB(a)::QAR(E)
      • K(b);P-FLIGHT::QAR1(E)
      • B(a);XS(A)::QAB1(E)
      • B(a);XP(C)::QAB1(E)
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).