MESON Chess Problem Database

Problem Display
PID: 172249 (7r/6p1/8/6Pk/4QP2/7K/8/8 w - - 0 1)

Andreev, Aleksandr Grigorevich

Kubanski krai, 1996

7r/6p1/8/6Pk/4QP2/7K/8/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rh7
      • 2.Qxh7#
    • 1...Ra8
      • 2.Qh7#
    • 1...Rb8
      • 2.Qh7#
    • 1...Rc8
      • 2.Qh7#
    • 1...Rd8
      • 2.Qh7#
    • 1...Re8
      • 2.Qh7#
    • 1...Rf8
      • 2.Qh7#
    • 1...Rg8
      • 2.Qh7#
    • 1...g6
      • 2.Qf3#
      • 2.Qe2#
  • Tries
    • 1.Kg3?
      • 1...Rh7
        • 2.Qxh7#
      • 1...Ra8
        • 2.Qh7#
      • 1...Rb8
        • 2.Qh7#
      • 1...Rc8
        • 2.Qh7#
      • 1...Rd8
        • 2.Qh7#
      • 1...Re8
        • 2.Qh7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Rg8
        • 2.Qh7#
      • 1...g6
        • 2.Qh1#
        • 2.Qf3#
        • 2.Qe2#
      • 1...Rh6!
    • 1.Qb1?
      • 1...Rh7
        • 2.Qxh7#
      • 1...Ra8
        • 2.Qh7#
      • 1...Rb8
        • 2.Qh7#
      • 1...Rc8
        • 2.Qh7#
      • 1...Rd8
        • 2.Qh7#
      • 1...Re8
        • 2.Qh7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Rg8
        • 2.Qh7#
      • 1...g6
        • 2.Qd1#
      • 1...Rh6!
    • 1.Qc2?
      • 1...Rh7
        • 2.Qxh7#
      • 1...Ra8
        • 2.Qh7#
      • 1...Rb8
        • 2.Qh7#
      • 1...Rc8
        • 2.Qh7#
      • 1...Rd8
        • 2.Qh7#
      • 1...Re8
        • 2.Qh7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Rg8
        • 2.Qh7#
      • 1...g6
        • 2.Qd1#
        • 2.Qe2#
      • 1...Rh6!
    • 1.Qd3?
      • 1...Rh7
        • 2.Qxh7#
      • 1...Ra8
        • 2.Qh7#
      • 1...Rb8
        • 2.Qh7#
      • 1...Rc8
        • 2.Qh7#
      • 1...Rd8
        • 2.Qh7#
      • 1...Re8
        • 2.Qh7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Rg8
        • 2.Qh7#
      • 1...g6
        • 2.Qe2#
        • 2.Qd1#
        • 2.Qf3#
      • 1...Rh6!
    • 1.Qe8+?
      • 1...g6
        • 2.Qe2#
        • 2.Qxh8#
      • 1...Rxe8!
  • Keys
    • 1.Qf5!
      • 1...Rh6
        • 2.g6#
      • 1...Rh7
        • 2.Qxh7#
      • 1...Ra8
        • 2.Qh7#
      • 1...Rb8
        • 2.Qh7#
      • 1...Rc8
        • 2.Qh7#
      • 1...Rd8
        • 2.Qh7#
      • 1...Re8
        • 2.Qh7#
      • 1...Rf8
        • 2.Qh7#
      • 1...Rg8
        • 2.Qh7#
      • 1...g6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::QAR2(B),XR(c)
    • R(c);N_GUARD::QAR2(B)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • R(c);N_GUARD::QAR2(B),XR(c)
        • R(c);N_GUARD::QAR2(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Vars
        • R(c);N_GUARD::QAR2(B),XR(c)
        • R(c);N_GUARD::QAR2(B)
        • P(b);SBLOCK::QAB(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Vars
        • R(c);N_GUARD::QAR2(B),XR(c)
        • R(c);N_GUARD::QAR2(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);
      • Vars
        • R(c);N_GUARD::QAR2(B),XR(c)
        • R(c);N_GUARD::QAR2(B)
      • Refutation
        • R(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • R(c);XQ(B)
  • Actual
    • Q(B);
    • Vars
      • R(c);SBLOCK::QAR(B)+P(D)
      • R(c);N_GUARD::QAR2(B),XR(c)
      • R(c);N_GUARD::QAR2(B)
      • P(b);SBLOCK::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).