MESON Chess Problem Database

Problem Display
PID: 157929 (8/rQP5/pn6/k7/8/1K6/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Bankovskaya gazeta, 1996

8/rQP5/pn6/k7/8/1K6/8/8

#2

3 + 4

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Qb4#
    • 1...Sc4
      • 2.Qb4#
    • 1...Sd7
      • 2.Qb4#
    • 1...Sa8
      • 2.Qb4#
    • 1...Sc8
      • 2.Qb4#
  • Tries
    • 1.c8S?
      • threat
        • 2.Qxb6#
      • 1...Kb5
        • 2.Qxb6#
      • 1...Sxc8
        • 2.Qb4#
      • 1...Sa4
        • 2.Qb4#
      • 1...Sc4
        • 2.Qd5#
        • 2.Qb4#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qb4#
      • 1...Sa8
        • 2.Qd5#
        • 2.Qb4#
      • 1...Rxb7!
    • 1.c8R?
      • threat
        • 2.Rc5#
      • 1...Sxc8
        • 2.Qb4#
      • 1...Sa4
        • 2.Qb4#
      • 1...Sd7
        • 2.Qb4#
      • 1...Kb5!
  • Keys
    • 1.c8Q!
      • threat
        • 2.Qc5#
      • 1...Kb5
        • 2.Qf5#
      • 1...Sxc8
        • 2.Qb4#
      • 1...Sa4
        • 2.Qb4#
      • 1...Sd7
        • 2.Qb4#
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • S(c);OGATE::QAB1(B)
  • Tries
    • Try
      • P(C);
      • Threat
        • QAB1(B),XS(c)
      • Vars
        • K(a);P-FLIGHT,P_SPINS(c)::QAR1(B),XS(c)
        • S(c);OGATE,XS(C)::QAB1(B)
        • S(c);OGATE::QAB1(B)
        • S(c);N_GUARD::QAR(B),XS(c)
      • Refutation
        • R(d);XQ(B)
    • Try
      • P(C);
      • Threat
        • R(C)
      • Vars
        • S(c);OGATE,XR(C)::QAB1(B)
        • S(c);OGATE::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(c)
  • Actual
    • P(C);
    • Threat
      • QAR2(C)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(c)::QAR(C)
      • S(c);OGATE,XQ(C)::QAB1(B)
      • S(c);OGATE::QAB1(B)
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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).