MESON Chess Problem Database

Problem Display
PID: 172551 (8/3p4/4n1R1/3k4/1K6/2Q2P2/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 2004

8/3p4/4n1R1/3k4/1K6/2Q2P2/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qc5#
    • 1...Sd4
      • 2.Qc5#
    • 1...Sf4
      • 2.Qc5#
    • 1...Sc5
      • 2.Qxc5#
    • 1...Sg5
      • 2.Qc5#
    • 1...Sc7
      • 2.Qc5#
    • 1...Sg7
      • 2.Qc5#
    • 1...Sd8
      • 2.Qc5#
    • 1...Sf8
      • 2.Qc5#
  • Tries
    • 1.Rxe6?
      • threat
        • 2.Qe5#
        • 2.Qc4#
      • 1...dxe6
        • 2.Qc5#
      • 1...d6
        • 2.Qc4#
      • 1...Kxe6!
    • 1.Rh6?
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qc5#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sc7
        • 2.Qc5#
      • 1...Sg7
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#
      • 1...Sf8
        • 2.Qc5#
      • 1...d6!
    • 1.Qc2?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sf4
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sc7
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sg7
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sd8
        • 2.Qe4#
        • 2.Qc5#
      • 1...Sf8
        • 2.Qe4#
        • 2.Qc5#
      • 1...d6
        • 2.Qe4#
      • 1...Ke5!
    • 1.Qe3?
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qe4#
      • 1...Sf4
        • 2.Qc5#
        • 2.Qe4#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sc7
        • 2.Qc5#
        • 2.Qe4#
      • 1...Sg7
        • 2.Qc5#
        • 2.Qe4#
      • 1...Sd8
        • 2.Qc5#
        • 2.Qe4#
      • 1...Sf8
        • 2.Qc5#
        • 2.Qe4#
      • 1...d6
        • 2.Qe4#
      • 1...Kc6!
    • 1.Qc4+?
      • 1...Kd6
        • 2.Qc5#
      • 1...Ke5!
  • Keys
    • 1.Rf6!
      • 1...Kd6
        • 2.Qc5#
      • 1...Sd4
        • 2.Qc5#
      • 1...Sf4
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sg5
        • 2.Qc5#
      • 1...Sc7
        • 2.Qc5#
      • 1...Sg7
        • 2.Qc5#
      • 1...Sd8
        • 2.Qc5#
      • 1...Sf8
        • 2.Qc5#
      • 1...d6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
    • S(b);N_GUARD::QAR1(A)
    • S(b);N_GUARD::QAR1(A),XS(b)
  • Tries
    • Try
      • R(D);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);SBLOCK,XR(D)::QAR1(A)
        • P(c);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XR(D)
    • Try
      • R(D);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
        • S(b);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
      • Refutation
        • P(c);
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
        • S(b);::QAB1(A)
        • S(b);N_GUARD::QAR1(A),XS(b)
        • S(b);N_GUARD::QAR1(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(a);P-FLIGHT,P_SPINS(b)::QAB1(A)
      • S(b);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAR1(A),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).