MESON Chess Problem Database

Problem Display
PID: 12091 (8/2R5/6p1/4Q3/6kp/4K3/7P/8 w - - 0 1)

Petrusenko, Alexey Matveevich

Sp. HM., Shakhmaty v SSSR, 1974

8/2R5/6p1/4Q3/6kp/4K3/7P/8

#2

4 + 3

3296 Shakhmatny zadachi miniaturi 1987
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...h3
      • 2.Rc4#
  • Tries
    • 1.Rc2?
      • 1...Kh3
        • 2.Qe6#
      • 1...h3
        • 2.Rc4#
      • 1...g5!
    • 1.Qf4+?
      • 1...Kh5
        • 2.Rh7#
      • 1...Kh3!
    • 1.Qd5?
      • 1...g5
        • 2.Qf3#
      • 1...h3
        • 2.Rc4#
      • 1...Kh3!
  • Keys
    • 1.Rh7!
      • 1...Kh3
        • 2.Qg3#
      • 1...h3
        • 2.Qf4#
      • 1...g5
        • 2.Qe6#

This anticipates 172550(2004)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::R(D)
  • Tries
    • Try
      • R(D);
      • Vars
        • K(a);S_FLIGHT::QAB(C)
        • P(b);SBLOCK::R(D)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(a);S_FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(c);SBLOCK::QAB1(C)
        • P(b);SBLOCK::R(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::QAR1(C)
      • P(b);::QAR1(C)
      • P(c);SBLOCK::QAB(C)
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).