MESON Chess Problem Database

Problem Display
PID: 10648 (q4k2/8/3R1K2/8/8/p4p2/8/1Q6 w - - 0 1)

Zakhodyakin, Gleb Nikolaevich

Shakhmaty v SSSR, 1966

q4k2/8/3R1K2/8/8/p4p2/8/1Q6

#2

3 + 4

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Qb8#
    • 1...Qb7
      • 2.Rd8#
    • 1...Qa7
      • 2.Rd8#
    • 1...Qb8
      • 2.Qxb8#
    • 1...Qd8+
      • 2.Rxd8#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qf7#
      • 1...Qd8+
        • 2.Rxd8#
      • 1...Qb7
        • 2.Rd8#
      • 1...Qa7
        • 2.Rd8#
      • 1...Qe8
        • 2.Qg7#
      • 1...Qd5!
    • 1.Qh7?
      • threat
        • 2.Qf7#
        • 2.Qh8#
      • 1...Qd8+
        • 2.Rxd8#
      • 1...Ke8
        • 2.Qg8#
        • 2.Qe7#
        • 2.Qf7#
        • 2.Qh8#
      • 1...Qb7
        • 2.Rd8#
        • 2.Qh8#
      • 1...Qa7
        • 2.Rd8#
        • 2.Qh8#
      • 1...Qe8
        • 2.Qg7#
        • 2.Qh8#
      • 1...Qd5!
    • 1.Qb3?
      • threat
        • 2.Qf7#
      • 1...Qd8+
        • 2.Rxd8#
      • 1...Ke8
        • 2.Qf7#
        • 2.Qg8#
      • 1...Qd5
        • 2.Qb8#
      • 1...Qb7
        • 2.Rd8#
      • 1...Qa7
        • 2.Rd8#
      • 1...Qe8!
  • Keys
    • 1.Qb7!
      • threat
        • 2.Qxa8#
        • 2.Qf7#
      • 1...Qd8+
        • 2.Rxd8#
      • 1...Ke8
        • 2.Qxa8#
        • 2.Qe7#
        • 2.Qf7#
      • 1...Kg8
        • 2.Qg7#
      • 1...Qxb7
        • 2.Rd8#
      • 1...Qa4
        • 2.Qf7#
      • 1...Qa5
        • 2.Qf7#
      • 1...Qa6
        • 2.Qf7#
      • 1...Qa7
        • 2.Rd8#
        • 2.Qc8#
      • 1...Qb8
        • 2.Qf7#
        • 2.Qxb8#
      • 1...Qc8
        • 2.Qxc8#
        • 2.Qf7#
      • 1...Qe8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD::QAR(A)
    • Q(c);N_GUARD::R(B)
    • Q(c);N_GUARD::QAR(A),XQ(c)
    • Q(c);CHECK,N_GUARD::R(B),XQ(c)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);CHECK,N_GUARD::R(B),XQ(c)
        • Q(c);N_GUARD::R(B)
        • Q(c);SBLOCK::QAB1(A)
      • Refutation
        • Q(c);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);CHECK,N_GUARD::R(B),XQ(c)
      • Refutation
        • Q(c);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • Q(c);CHECK,N_GUARD::R(B),XQ(c)
        • Q(c);N_GUARD::QAR(A)
        • Q(c);N_GUARD::R(B)
      • Refutation
        • Q(c);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • Q(c);CHECK,N_GUARD::R(B),XQ(c)
      • K(d);P-FLIGHT::QAR1(A)
      • Q(c);N_GUARD,XQ(A)::R(B)
      • Q(c);::QAR1(A)
      • Q(c);P_PINR(B)::QAR1(A)
      • Q(c);SBLOCK::QAB1(A)
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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).