MESON Chess Problem Database

Problem Display
PID: 164651 (8/8/8/1Q6/1K6/7p/1kP5/1b4R1 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kuban segodniya, 1996

8/8/8/1Q6/1K6/7p/1kP5/1b4R1

#2

4 + 3

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc2
      • 2.Qe2#
  • Tries
    • 1.Qd3?
      • 1...Ka1
        • 2.Qa3#
      • 1...Ka2
        • 2.Qa3#
      • 1...Bxc2
        • 2.Qa3#
      • 1...Ba2
        • 2.Qc3#
      • 1...h2!
    • 1.Qe5+?
      • 1...Kxc2
        • 2.Qc3#
        • 2.Qe2#
      • 1...Ka2!
  • Keys
    • 1.Qf1!
      • threat
        • 2.Qxb1#
      • 1...Ka1
        • 2.Qxb1#
      • 1...Ka2
        • 2.Qxb1#
      • 1...Kxc2
        • 2.Qe2#
      • 1...Bxc2
        • 2.Qa1#
      • 1...Ba2
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(D)
  • Tries
    • Try
      • Q(D);
      • Vars
        • K(b);P_SPINB(a),S_FLIGHT::QAR2(D)
        • K(b);P-FLIGHT::QAR1(D)
        • B(a);SBLOCK,XP(B)::QAB1(D)
        • B(a);SBLOCK::QAB1(D)
      • Refutation
        • P(c);
    • Try
      • Q(D);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(D);
    • Threat
      • QAR1(D),XB(a)
    • Vars
      • K(b);P_SPINB(a),S_FLIGHT::QAR1(D),XB(a)
      • K(b);P-FLIGHT::QAB1(D),XB(a)
      • K(b);OGATEB,P-FLIGHT,XP(B)::QAR2(D)
      • B(a);OGATE,SBLOCK,XP(B)::QAB1(D)
      • B(a);SBLOCK::QAB1(D)
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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).