MESON Chess Problem Database

Problem Display
PID: 172405 (8/2p5/Rn6/2k4B/8/K2Q4/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1997

8/2p5/Rn6/2k4B/8/K2Q4/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c6
      • 2.Ra5#
  • Tries
    • 1.Kb3?
      • 1...Sa4
        • 2.Qc4#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sa8
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...c6
        • 2.Ra5#
      • 1...Kc6!
    • 1.Be2?
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sa4
        • 2.Qc4#
      • 1...Sd5
        • 2.Qc4#
      • 1...Sd7
        • 2.Qc4#
      • 1...Sa8
        • 2.Qc4#
      • 1...Sc8
        • 2.Qc4#
      • 1...c6
        • 2.Ra5#
      • 1...Kc6!
    • 1.Bf3?
      • threat
        • 2.Ra5#
      • 1...Sa4
        • 2.Rc6#
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7
        • 2.Rc6#
        • 2.Qd5#
      • 1...Sa8
        • 2.Rc6#
        • 2.Qd5#
      • 1...Sc8
        • 2.Rc6#
        • 2.Qd5#
      • 1...Sc4+!
  • Keys
    • 1.Bf7!
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Kc6
        • 2.Qd5#
      • 1...Sa4
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd7
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sa8
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sc8
        • 2.Qc4#
        • 2.Qd5#
      • 1...c6
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::R(D)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • S(b);N_GUARD::QAR1(B)
        • S(b);N_GUARD::QAR1(B),XS(b)
        • P(c);SBLOCK::R(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
    • Try
      • B(C);
      • Vars
        • S(b);CHECK,N_GUARD::QAR1(B),XS(b)
        • S(b);N_GUARD::QAR1(B)
        • P(c);SBLOCK::R(D)
      • Refutation
        • K(a);P-FLIGHT,P_SPINS(b)
    • Try
      • B(C);
      • Threat
        • R(D)
      • Vars
        • S(b);N_GUARD::QAR1(B),XS(b)
      • Refutation
        • S(b);CHECK
  • Actual
    • B(C);
    • Vars
      • S(b);CHECK,N_GUARD::QAR1(B),XS(b)
      • K(a);P-FLIGHT,P_SPINS(b)::QAB1(B)
      • S(b);N_GUARD::QAR1(B),XS(b)
      • P(c);SBLOCK::R(D)
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).