MESON Chess Problem Database

Problem Display
PID: 229425 (8/N7/p2Q4/1p6/k7/8/2K5/8 w - - 0 1)

Surkov, Valery Albertovich

Sachova skladba, 2003

8/N7/p2Q4/1p6/k7/8/2K5/8

#2

3 + 3

6490 yacpdb 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qxa6#
  • Tries
    • 1.Kb2?
      • threat
        • 2.Qa3#
      • 1...b4
        • 2.Qxa6#
      • 1...Ka5!
    • 1.Sc6?
      • threat
        • 2.Qb4#
      • 1...b4
        • 2.Qxb4#
      • 1...a5!
    • 1.Qd4+?
      • 1...Ka5
        • 2.Sc6#
      • 1...b4
        • 2.Qa1#
      • 1...Ka3!
  • Keys
    • 1.Sc8!
      • 1...Ka5
        • 2.Qa3#
      • 1...b4
        • 2.Qxa6#
      • 1...a5
        • 2.Sb6#

This anticipates 239230(2004)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK::QAR2(B),XP(c)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Threat
        • QAR1(B)
      • Vars
        • P(b);SBLOCK::QAR2(B),XP(c)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • P(b);::QAR1(B),XP(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::S(C)
        • P(b);P_SPINP(b),SBLOCK::QAR(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(C);
    • Vars
      • K(a);P-FLIGHT::QAR2(B)
      • P(b);SBLOCK::QAR2(B),XP(c)
      • P(c);SBLOCK::S(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).