MESON Chess Problem Database

Problem Display
PID: 2949 (8/p3p3/P3Rp2/5P2/N1k5/K1B5/P2p4/1N1B4 w - - 0 1)

Mackay, AL

Source?, 1913

8/p3p3/P3Rp2/5P2/N1k5/K1B5/P2p4/1N1B4

#2

9 + 5

2681 All Change Here! 1919

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sb2#
    • 1...Kb5
      • 2.Be2#
    • 1...Kd5
      • 2.Bb3#
  • Tries
    • 1.Sxd2+?
      • 1...Kb5
        • 2.Be2#
      • 1...Kd5
        • 2.Bb3#
        • 2.Bf3#
      • 1...Kd3!
    • 1.Bb3+?
      • 1...Kd3
        • 2.Sb2#
        • 2.Sc5#
      • 1...Kb5!
    • 1.Re5?
      • threat
        • 2.Sb2#
        • 2.Be2#
      • 1...Kd3
        • 2.Sb2#
      • 1...fxe5!
    • 1.Rd6?
      • threat
        • 2.Be2#
      • 1...Kb5
        • 2.Be2#
      • 1...exd6!
  • Keys
    • 1.Kb2!
      • 1...Kd3
        • 2.Be2#
      • 1...Kb5
        • 2.Sa3#
      • 1...Kd5
        • 2.Bb3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::S(F)
    • K(b);S_FLIGHT::B(B)
  • Tries
    • Try
      • S(A);CHECK,XP(a)
      • Vars
        • K(b);S_FLIGHT::B(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(I);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • P(c);XR(I)
    • Try
      • R(I);
      • Threat
        • B(B)
      • Vars
        • K(b);S_FLIGHT::B(B)
      • Refutation
        • P(e);XR(I)
  • Actual
    • K(D);S_FLIGHT
    • Vars
      • K(b);S_FLIGHT::B(B)
      • K(b);S_FLIGHT::S(A)
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).