MESON Chess Problem Database

Problem Display
PID: 95039 (8/b7/1R6/kp6/3Q4/8/1K6/5b2 w - - 0 1)

Shakhnazaryan, Albert Serapionovic

Krimskaya Pravda, 1981

8/b7/1R6/kp6/3Q4/8/1K6/5b2

#2

3 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...b4
      • 2.Qxb4#
  • Tries
    • 1.Qc3+?
      • 1...Ka4
        • 2.Ra6#
        • 2.Qa3#
      • 1...b4
        • 2.Qxb4#
      • 1...Kxb6!
    • 1.Qd2+?
      • 1...Ka4
        • 2.Ra6#
      • 1...b4
        • 2.Qxb4#
      • 1...Kxb6!
  • Keys
    • 1.Qd6!
      • threat
        • 2.Ra6#
      • 1...Ka4
        • 2.Ra6#
        • 2.Qa3#
      • 1...Bxb6
        • 2.Qa3#
      • 1...b4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(c);::QAB1(B),XP(c)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT::R(C)
        • P(c);P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
  • Actual
    • Q(B);
    • Threat
      • R1(C)
    • Vars
      • B(d);SBLOCK,XR(C)::QAR2(B)
      • P(c);::QAB1(B),XP(c)
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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).