MESON Chess Problem Database

Problem Display
PID: 246070 (q4k1K/8/5p2/7B/8/8/1R6/4R3 w - - 0 1)

Zinoviev, Nikolai

Sa ogneupory, 1989

q4k1K/8/5p2/7B/8/8/1R6/4R3

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qh1
      • 2.Re8#
      • 2.Rb8#
    • 1...Qg2
      • 2.Re8#
      • 2.Rb8#
    • 1...Qf3
      • 2.Re8#
      • 2.Rb8#
    • 1...Qd5
      • 2.Re8#
    • 1...Qb7
      • 2.Re8#
    • 1...Qa1
      • 2.Re8#
      • 2.Rb8#
    • 1...Qa2
      • 2.Re8#
      • 2.Rb8#
    • 1...Qa3
      • 2.Re8#
      • 2.Rb8#
    • 1...Qa5
      • 2.Re8#
    • 1...Qa6
      • 2.Re8#
    • 1...Qa7
      • 2.Re8#
    • 1...Qb8
      • 2.Rxb8#
    • 1...Qe8
      • 2.Rxe8#
  • Tries
    • 1.Rg2?
      • threat
        • 2.Rg8#
      • 1...Qxg2
        • 2.Re8#
      • 1...Qd5
        • 2.Re8#
      • 1...Qa2
        • 2.Re8#
      • 1...Qe4!
  • Keys
    • 1.Rb7!
      • threat
        • 2.Rf7#
      • 1...Qxb7
        • 2.Re8#
      • 1...Qa2
        • 2.Re8#
        • 2.Rb8#
      • 1...Qa7
        • 2.Re8#
      • 1...Qe8
        • 2.Rxe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • Q(b);N_GUARD::R1(A)
    • Q(b);N_GUARD::R(B),XQ(b)
    • Q(b);N_GUARD::R1(A),XQ(b)
  • Tries
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • Q(b);N_GUARD,XR(B)::R1(A)
        • Q(b);N_GUARD::R1(A)
      • Refutation
        • Q(b);
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • Q(b);N_GUARD,XR(B)::R1(A)
      • Q(b);N_GUARD::R1(A)
      • Q(b);N_GUARD::R1(A),XQ(b)
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