MESON Chess Problem Database

Problem Display
PID: 6601 (2K5/Rn6/3k4/3B4/3P4/8/Q7/8 w - - 0 1)

Lebedev, Viacheslav Aleksandr

Die Schwalbe, 1932

2K5/Rn6/3k4/3B4/3P4/8/Q7/8

#2

5 + 2

3296 Shakhmatny zadachi miniaturi 1987
3813 300 Sachmatu Uzdaviniu 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Rd7#
    • 1...Sd8
      • 2.Rd7#
  • Tries
    • 1.Bh1?
      • 1...Sa5
        • 2.Rd7#
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qd5#
      • 1...Ke7!
    • 1.Bg2?
      • 1...Sa5
        • 2.Rd7#
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qd5#
      • 1...Ke7!
    • 1.Bf3?
      • 1...Sa5
        • 2.Rd7#
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qd5#
      • 1...Ke7!
    • 1.Be4?
      • 1...Sa5
        • 2.Rd7#
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qd5#
      • 1...Ke7!
    • 1.Be6?
      • 1...Kc6
        • 2.Qa6#
      • 1...Sa5
        • 2.Qd5#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Qd5#
      • 1...Ke7!
    • 1.Bf7?
      • threat
        • 2.Qe6#
      • 1...Kc6
        • 2.Qa6#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Qd5#
      • 1...Ke7!
    • 1.Bg8?
      • threat
        • 2.Qe6#
      • 1...Kc6
        • 2.Qa6#
      • 1...Sc5
        • 2.Qd5#
      • 1...Sd8
        • 2.Qd5#
      • 1...Ke7!
    • 1.Qc4?
      • 1...Sa5
        • 2.Rd7#
        • 2.Qc5#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qc5#
      • 1...Ke7!
    • 1.Qe2?
      • threat
        • 2.Qe5#
        • 2.Qe6#
      • 1...Sc5
        • 2.Qe5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qe5#
      • 1...Kxd5!
    • 1.Qa3+?
      • 1...Sc5
        • 2.Rd7#
        • 2.Qxc5#
      • 1...Kxd5!
  • Keys
    • 1.Qa5!
      • 1...Ke7
        • 2.Qd8#
      • 1...Sxa5
        • 2.Rd7#
      • 1...Sc5
        • 2.Qxc5#
      • 1...Sd8
        • 2.Rd7#
        • 2.Qxd8#
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(b);OGATE::R1(D)
  • Tries
    • Try
      • B(C);
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAR2(A)
        • S(b);::QAR1(A)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(b);N_GUARD::QAB1(A),XS(b)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT,XB(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(a);P-FLIGHT,XB(C)
  • Actual
    • Q(A);
    • Vars
      • K(a);P_SPINS(b),S_FLIGHT::QAB1(A)
      • S(b);OGATE,XQ(A)::R1(D)
      • S(b);N_GUARD::QAB1(A),XS(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).