MESON Chess Problem Database

Problem Display
PID: 169818 (2B5/3K4/p7/1k6/2N5/4R3/3R4/4B1Q1 w - - 0 1)

Pelle, Charles

Bulletin de la FFE, 1945

2B5/3K4/p7/1k6/2N5/4R3/3R4/4B1Q1

#2

7 + 2

5454 Near Snap 2018
6490 yacpdb 2018

SOLUTION

  • SOUND
  • Tries
    • 1.Sb2?
      • 1...Kb4
        • 2.Rd5#
      • 1...Kc5
        • 2.Rb3#
      • 1...Kb6
        • 2.Re5#
      • 1...a5
        • 2.Rb3#
      • 1...Ka5!
    • 1.Rd4?
      • 1...Ka4
        • 2.Sa3#
        • 2.Sd6#
      • 1...Kc5
        • 2.Re5#
      • 1...a5!
    • 1.Rd5+?
      • 1...Ka4
        • 2.Sb2#
        • 2.Sb6#
        • 2.Ra3#
        • 2.Ra5#
      • 1...Kxc4!
  • Keys
    • 1.Sb6!
      • 1...Kb4
        • 2.Rd5#
      • 1...Ka5
        • 2.Rb2#
      • 1...Kc5
        • 2.Rb3#
      • 1...Kxb6
        • 2.Re5#
      • 1...a5
        • 2.Rb3#

This anticipates 23456(1963)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);
      • Vars
        • K(a);P-FLIGHT::B(A)+R(C)
        • K(a);P-FLIGHT::QAB(B)+R(D)
        • P(b);SBLOCK::R(D)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • P(b);
    • Try
      • R(C);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • S(E);
    • Vars
      • K(a);P-FLIGHT::B(A)+R(C)
      • K(a);P-FLIGHT::QAB(B)+R(D)
      • K(a);P-FLIGHT,XS(E)::QAB(B)+R(D)
      • P(b);SBLOCK::R(D)
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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).