MESON Chess Problem Database

Problem Display
PID: 227861 (8/8/8/8/8/1p5p/pR6/R4K1k w - - 0 1)

Schonberger, Tibor

Magyar Sakkvilag, 1926

8/8/8/8/8/1p5p/pR6/R4K1k

#2

3 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...h2
      • 2.Kf2#
  • Tries
    • 1.Ke1?
      • 1...h2
        • 2.Kf2#
      • 1...Kg1!
    • 1.Ke2+?
      • 1...Kh2
        • 2.Kf3#
      • 1...Kg2!
    • 1.Raxa2?
      • threat
        • 2.Rh2#
      • 1...h2
        • 2.Rxh2#
      • 1...bxa2!
    • 1.Rd2?
      • 1...h2
        • 2.Kf2#
      • 1...b2!
    • 1.Re2?
      • 1...h2
        • 2.Kf2#
      • 1...b2!
    • 1.Rxb3?
      • threat
        • 2.Rxh3#
      • 1...h2
        • 2.Kf2#
      • 1...Kh2!
  • Keys
    • 1.Kf2+!
      • 1...Kh2
        • 2.Kf3#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(d);SBLOCK::R(A)+K(B)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(d);SBLOCK::R(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • K(a);P-FLIGHT::R(C)+K(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(A);XP(b)
      • Threat
        • R1(C)
      • Vars
        • P(d);::R1(C),XP(d)
      • Refutation
        • P(c);XR(A)
    • Try
      • R(C);
      • Vars
        • P(d);SBLOCK::R(A)+K(B)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Vars
        • P(d);SBLOCK::R(A)+K(B)
      • Refutation
        • P(c);
    • Try
      • R(C);XP(c)
      • Threat
        • R(C),XP(d)
      • Vars
        • P(d);SBLOCK::R(A)+K(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • K(B);CHECK,P-FLIGHT
    • Vars
      • K(a);P-FLIGHT::R(C)+K(B)
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).