Problem Display
PID: 23054 (8/3N4/1N6/1K6/3pk3/8/1P3Q2/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/3N4/1N6/1K6/3pk3/8/1P3Q2/8

#2

5 + 2


5454 Near Snap 2009

SOLUTION


  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sc5#
  • Tries
    • 1.Ka4?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3!
    • 1.Kb4?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3!
    • 1.Ka5?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3!
    • 1.Ka6?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3!
    • 1.Kc6?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3!
    • 1.Sa4?
      • 1...Kd3
        • 2.Sac5#
        • 2.Sdc5#
      • 1...d3
        • 2.Sc3#
      • 1...Kd5!
    • 1.Sd5?
      • 1...Kd3
        • 2.Sc5#
      • 1...d3
        • 2.Sc3#
        • 2.S5f6#
      • 1...Kxd5!
    • 1.Sc8?
      • 1...Kd3
        • 2.Sc5#
      • 1...Kd5
        • 2.Qf5#
      • 1...d3!
  • Keys
    • 1.Sc4!
      • 1...Kd3
        • 2.Sc5#
      • 1...Kd5
        • 2.Qf5#
      • 1...d3
        • 2.Sf6#

Anticipated by 45932(1972)

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(E)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • P(a);
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • P(a);
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • P(a);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • P(a);
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • P(a);
    • Try
      • S(D);
      • Vars
        • P(a);N_GUARD,SBLOCK::S(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • S(D);
      • Vars
        • K(b);S_FLIGHT::S(E)
        • K(b);S_FLIGHT::QAR2(B)
      • Refutation
        • P(a);
  • Actual
    • S(D);
    • Vars
      • K(b);S_FLIGHT::S(E)
      • K(b);S_FLIGHT::QAR2(B)
      • P(a);SBLOCK::S(E)


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).