MESON Chess Problem Database

Problem Display
PID: 245023 (8/3R4/8/5k2/3PN3/6K1/8/1Q6 w - - 0 1)

Bogdanov, Evgeny Mikhailovich

Smena (Moscow), 2002

8/3R4/8/5k2/3PN3/6K1/8/1Q6

#2

5 + 1

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sd6+?
      • 1...Ke6
        • 2.Qf5#
      • 1...Kf6
        • 2.Qf5#
      • 1...Kg5!
    • 1.Rf7+?
      • 1...Ke6
        • 2.Qa2#
        • 2.Qb3#
      • 1...Kg6!
    • 1.Qd1?
      • threat
        • 2.Qg4#
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Qg4#
      • 1...Kg6!
    • 1.Qf1+?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Ke6
        • 2.Sc5#
        • 2.Qh3#
        • 2.Qf7#
      • 1...Kg6!
    • 1.Qb3?
      • 1...Kxe4
        • 2.Qf3#
      • 1...Kg6!
    • 1.Qb5+?
      • 1...Ke6
        • 2.Qd5#
      • 1...Kg6
        • 2.Qg5#
      • 1...Kxe4!
    • 1.Qb7?
      • 1...Ke6
        • 2.Qd5#
      • 1...Kg6!
  • Keys
    • 1.Qh1!
      • 1...Ke6
        • 2.Qh3#
      • 1...Kg6
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(E);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(A)
        • K(a);S_FLIGHT::QAB(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT,XS(D)::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(D)
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)
      • K(a);S_FLIGHT::QAB1(A)
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