MESON Chess Problem Database

Problem Display
PID: 245046 (8/QN6/8/1b6/r7/8/6R1/k1K5 w - - 0 1)

Chernyavsky, Mykola Vasilovich

Smena (Moscow), 1996

8/QN6/8/1b6/r7/8/6R1/k1K5

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Rxa2#
      • 2.Qxa2#
    • 1...Ra3
      • 2.Qxa3#
    • 1...Ra5
      • 2.Qd4#
    • 1...Ra6
      • 2.Qd4#
    • 1...Bf1
      • 2.Qxa4#
    • 1...Be2
      • 2.Qxa4#
    • 1...Bd3
      • 2.Qxa4#
    • 1...Bc4
      • 2.Qd4#
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qc3#
      • 1...Be2
        • 2.Qxa4#
      • 1...Ra2
        • 2.Rxa2#
        • 2.Qxa2#
      • 1...Ra3
        • 2.Qxa3#
      • 1...Rxa5!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sb3#
      • 1...Be2
        • 2.Qxa4#
      • 1...Bc4
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(b);OGATE::QAR2(C),XR(b)
    • R(b);N_GUARD::QAB(C)
    • B(c);N_GUARD::QAR(C),XR(b)
    • B(c);::QAB(C)
  • Tries
    • Try
      • Q(C);
      • Threat
        • QAB(C)
      • Vars
        • B(c);N_GUARD::QAR(C),XR(b)
        • R(b);OGATE::QAR2(C),XR(b)
      • Refutation
        • R(b);N_SPINR(b),XQ(C)
  • Actual
    • S(D);
    • Threat
      • S(D)
    • Vars
      • B(c);N_GUARD::QAR(C),XR(b)
      • B(c);::QAB(C)
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