Problem Display
PID: 166157 (2K5/3R1p2/3pk3/8/5Q2/8/8/2B5 w - - 0 1)

Lincoln, Robert A

1st Comm., ChessStar, 2014

2K5/3R1p2/3pk3/8/5Q2/8/8/2B5

#2

4 + 3


145 StrateGems 2016

SOLUTION


  • SOUND
  • Sets
    • 1...f5
      • 2.Qxd6#
    • 1...f6
      • 2.Qe4#
  • Tries
    • 1.Kd8?
      • threat
        • 2.Rxd6#
      • 1...f5
        • 2.Qxd6#
      • 1...d5
        • 2.Rd6#
        • 2.Re7#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Bb2?
      • threat
        • 2.Qe4#
        • 2.Qxf7#
      • 1...d5
        • 2.Qe5#
        • 2.Qf6#
        • 2.Qxf7#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#
      • 1...Kd5!
    • 1.Be3?
      • 1...Kd5
        • 2.Rxd6#
      • 1...f5
        • 2.Qxd6#
      • 1...f6
        • 2.Qe4#
      • 1...d5!
    • 1.Rxf7?
      • threat
        • 2.Qf5#
      • 1...d5
        • 2.Qf6#
      • 1...Kd5!
  • Keys
    • 1.Ba3!
      • 1...Kd5
        • 2.Rxd6#
      • 1...f5
        • 2.Qxd6#
      • 1...d5
        • 2.Re7#
      • 1...f6
        • 2.Qe4#

FEATURES


  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAR1(B),XP(a)
    • P(c);SBLOCK::QAR2(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • R1(C),XP(a)
      • Vars
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • B(A);
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);::QAR2(B)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::R1(C),XP(a)
        • P(c);SBLOCK::QAR1(B),XP(a)
        • P(c);SBLOCK::QAR2(B)
      • Refutation
        • P(a);
    • Try
      • R(C);XP(c)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);SBLOCK::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(b);P_SPINP(a),S_FLIGHT::R1(C),XP(a)
      • P(c);SBLOCK::QAR1(B),XP(a)
      • P(a);SBLOCK::R1(C)
      • P(c);SBLOCK::QAR2(B)


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).