MESON Chess Problem Database

Problem Display
PID: 161865 (8/8/B7/4Q3/8/1r3k1K/3R4/1b6 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/8/B7/4Q3/8/1r3k1K/3R4/1b6

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qg3#
  • Tries
    • 1.Bf1?
      • threat
        • 2.Bg2#
      • 1...Be4
        • 2.Qg3#
      • 1...Bf5+!
    • 1.Bb7+?
      • 1...Be4
        • 2.Qg3#
        • 2.Qxe4#
      • 1...Rxb7!
    • 1.Qd4?
      • threat
        • 2.Be2#
        • 2.Rf2#
      • 1...Be4
        • 2.Rf2#
        • 2.Qf2#
      • 1...Rb2
        • 2.Be2#
      • 1...Rd3
        • 2.Bb7#
        • 2.Rf2#
      • 1...Re3
        • 2.Qg4#
      • 1...Rb5
        • 2.Rf2#
      • 1...Bd3
        • 2.Rf2#
      • 1...Bf5+!
  • Keys
    • 1.Re2!
      • threat
        • 2.Qg3#
      • 1...Bf5+
        • 2.Qxf5#
      • 1...Rd3
        • 2.Qe4#
      • 1...Re3
        • 2.Qxe3#
      • 1...Rb5
        • 2.Qe3#
      • 1...Bd3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • B(a);SBLOCK::QAR1(C)
  • Tries
    • Try
      • B(D);
      • Threat
        • B(D)
      • Vars
        • B(a);SBLOCK::QAR1(C)
      • Refutation
        • B(a);CHECK
    • Try
      • B(D);CHECK
      • Refutation
        • R(b);XB(D)
    • Try
      • Q(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::B(D)
        • R(b);SBLOCK::QAB1(C)
        • R(b);::R1(A)
        • B(a);::R1(A)
      • Refutation
        • B(a);CHECK
  • Actual
    • R(A);
    • Threat
      • QAR1(C)
    • Vars
      • B(a);CHECK,N_GUARD::QAR2(C),XB(a)
      • R(b);S_CUTB(a)::QAB1(C)
      • R(b);N_GUARD::QAR1(C),XR(b)
      • R(b);N_GUARD::QAR1(C)
      • B(a);S_CUTR(b)::QAR1(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).