MESON Chess Problem Database

Problem Display
PID: 186831 (8/6k1/3P3N/7K/8/8/1R6/7Q w - - 0 1)

Nikitin, Vladimir V

Freie Presse, 2000

(First published on Fri Jul 21 2000)

8/6k1/3P3N/7K/8/8/1R6/7Q

#2

5 + 1

15391 Problemschach-Jahrbuch (2000) 2001

SOLUTION

  • SOUND
  • Tries
    • 1.Rb8?
      • 1...Kh7
        • 2.Qb7#
      • 1...Kf6!
    • 1.Qg2+?
      • 1...Kh7
        • 2.Qg8#
      • 1...Kf8
        • 2.Rb8#
        • 2.Qg8#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kf6!
    • 1.Qe4?
      • 1...Kf6
        • 2.Qe7#
      • 1...Kf8
        • 2.Qe7#
      • 1...Kh8!
    • 1.Qd5?
      • 1...Kh7
        • 2.Qg8#
      • 1...Kf8
        • 2.Qf7#
        • 2.Qg8#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kf6!
    • 1.Qb7+?
      • 1...Kf6
        • 2.Qe7#
      • 1...Kf8
        • 2.Qe7#
        • 2.Qf7#
      • 1...Kh8!
    • 1.Qa8?
      • 1...Kh7
        • 2.Rb7#
        • 2.Qg8#
      • 1...Kf6!
    • 1.Qg1+?
      • 1...Kh7
        • 2.Qg8#
      • 1...Kf8
        • 2.Rb8#
        • 2.Qg8#
      • 1...Kh8
        • 2.Qg8#
      • 1...Kf6!
  • Keys
    • 1.Qa1!
      • 1...Kf6
        • 2.Re2#
      • 1...Kh7
        • 2.Rb7#
      • 1...Kf8
        • 2.Rb8#
      • 1...Kh8
        • 2.Rb7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
        • K(a);S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAB1(A)
        • K(a);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(a);S_FLIGHT::QAB(A)+R(B)
      • K(a);P-FLIGHT::R(B)
      • K(a);S_FLIGHT::R(B)
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