MESON Chess Problem Database

Problem Display
PID: 6503 (8/8/8/8/2QR4/4R3/2P2q2/K1k5 w - - 0 1)

Lebedev, Aleksandr N

Zadachi i Etyudi, 1929

8/8/8/8/2QR4/4R3/2P2q2/K1k5

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Rxe1#
    • 1...Qxc2
      • 2.Re1#
    • 1...Qg2
      • 2.Re1#
    • 1...Qh2
      • 2.Re1#
    • 1...Qf4
      • 2.Re1#
    • 1...Qf5
      • 2.Re1#
    • 1...Qf6
      • 2.Re1#
    • 1...Qf7
      • 2.Re1#
    • 1...Qf8
      • 2.Re1#
  • Tries
    • 1.Qa2?
      • threat
        • 2.Qb1#
        • 2.Qb2#
      • 1...Qd2
        • 2.Qb1#
      • 1...Qxc2!
    • 1.Qb3?
      • threat
        • 2.Qb1#
        • 2.Qb2#
      • 1...Qd2
        • 2.Qb1#
      • 1...Qxc2!
    • 1.Qb5?
      • threat
        • 2.Qb1#
        • 2.Qb2#
      • 1...Kxc2
        • 2.Qc4#
        • 2.Qc6#
        • 2.Qb1#
        • 2.Qb2#
        • 2.Qc5#
      • 1...Qd2
        • 2.Qb1#
      • 1...Qxc2!
    • 1.Qb4?
      • threat
        • 2.Qb1#
        • 2.Qb2#
      • 1...Kxc2
        • 2.Rc3#
        • 2.Qc3#
        • 2.Qc5#
        • 2.Qb1#
        • 2.Qb2#
        • 2.Qc4#
      • 1...Qd2
        • 2.Qxd2#
        • 2.Qb1#
      • 1...Qxc2!
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qb2#
      • 1...Qxc2
        • 2.Re1#
      • 1...Qd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 8
  • Sets
    • Q(b);N_GUARD::R(C),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XP(B)::R(C)
    • Q(b);N_GUARD::R(C)
    • Q(b);N_GUARD,P_PINR(E)::R(C)
  • Tries
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::QAR1(D)
      • Refutation
        • Q(b);XP(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::QAR1(D)
      • Refutation
        • Q(b);XP(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::QAR1(D)
      • Refutation
        • Q(b);XP(B)
    • Try
      • Q(D);
      • Threat
        • DUALS(2)
      • Refutation
        • Q(b);XP(B)
  • Actual
    • Q(D);
    • Threat
      • QAB1(D)
    • Vars
      • Q(b);N_GUARD,P_SPINQ(b),XP(B)::R(C)
      • Q(b);N_GUARD::QAB1(D),XQ(b)
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).