MESON Chess Problem Database

Problem Display
PID: 237998 (8/QN1k1NB1/8/K1R5/4P3/3n4/8/3R4 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Revista Romana de Sah, 1971

8/QN1k1NB1/8/K1R5/4P3/3n4/8/3R4

#2

8 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Sbd8#
    • 1...Ke8
      • 2.Sbd6#
  • Tries
    • 1.Ka4?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Kb5?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Ka6?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Kb6?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rd2?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rxd3+?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rcc1?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rc2?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rc3?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rc4?
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Re5?
      • 1...Kc6
        • 2.Sbd8#
      • 1...Kc8
        • 2.Sbd6#
      • 1...Kc7!
    • 1.Rc6?
      • 1...Kxc6
        • 2.Sbd8#
      • 1...Ke8
        • 2.Sbd6#
      • 1...Ke7!
    • 1.Rc7+?
      • 1...Ke6
        • 2.Sbd8#
        • 2.Sg5#
        • 2.Sfd8#
        • 2.Qb6#
        • 2.Qa6#
      • 1...Ke8
        • 2.Sbd6#
        • 2.Sfd6#
        • 2.Qb8#
        • 2.Qa8#
      • 1...Kxc7!
    • 1.Qb6?
      • 1...Ke8
        • 2.Qe6#
      • 1...Ke7!
    • 1.Qb8?
      • 1...Ke6
        • 2.Qe8#
      • 1...Ke7!
    • 1.Qa6?
      • 1...Ke8
        • 2.Qe6#
      • 1...Ke7!
    • 1.Qa8?
      • 1...Ke6
        • 2.Qe8#
      • 1...Ke7!
  • Keys
    • 1.Rc8!
      • 1...Ke6
        • 2.Sbd8#
      • 1...Ke7
        • 2.Sc5#
      • 1...Kxc8
        • 2.Sbd6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(b);N_SPINS(a),S_FLIGHT::S(F)
  • Tries
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • K(C);P-FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(A);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(A);CHECK,XS(a)
      • Vars
        • K(b);S_FLIGHT::S(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT,XR(D)::S(F)
        • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • R(D);CHECK
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT,XR(D)
    • Try
      • Q(E);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(b);N_SPINS(a),S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);N_SPINS(a),P-FLIGHT
  • Actual
    • R(D);
    • Vars
      • K(b);N_SPINS(a),S_FLIGHT::S(F)
      • K(b);N_SPINS(a),P-FLIGHT::QAR(E)+S(F)
      • K(b);N_SPINS(a),S_FLIGHT,XR(D)::S(F)
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