MESON Chess Problem Database

Problem Display
PID: 246081 (8/4Q3/p7/5k1K/r7/8/6N1/2B5 w - - 0 1)

Zinoviev, Nikolai

Problemist Pribuzhya, 1990

8/4Q3/p7/5k1K/r7/8/6N1/2B5

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sh4#
    • 1...Ra2
      • 2.Sh4#
    • 1...Ra3
      • 2.Sh4#
    • 1...Rf4
      • 2.Se3#
    • 1...Rh4+
      • 2.Sxh4#
    • 1...Ra5
      • 2.Sh4#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qe6#
      • 1...Re4
        • 2.Qg5#
      • 1...Rxf4!
    • 1.Bf4?
      • threat
        • 2.Qe5#
      • 1...Rxf4
        • 2.Se3#
      • 1...Re4
        • 2.Qf7#
      • 1...Ra5!
    • 1.Bh6?
      • threat
        • 2.Se3#
      • 1...Rh4+
        • 2.Sxh4#
      • 1...Ra3
        • 2.Sh4#
      • 1...Re4!
  • Keys
    • 1.Bg5!
      • threat
        • 2.Se3#
      • 1...Rh4+
        • 2.Sxh4#
      • 1...Ra3
        • 2.Sh4#
      • 1...Re4
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • R(a);N_GUARD::S(B)
    • R(a);SBLOCK::S(B)
    • R(a);CHECK,N_GUARD::S(B),XR(a)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAB1(D)
      • Vars
        • R(a);SBLOCK::QAR1(D)
      • Refutation
        • R(a);XS(B)
    • Try
      • B(A);
      • Threat
        • QAR1(D)
      • Vars
        • R(a);SBLOCK,XB(A)::S(B)
        • R(a);SBLOCK::QAR2(D)
      • Refutation
        • R(a);
    • Try
      • B(A);
      • Threat
        • S(B)
      • Vars
        • R(a);CHECK,N_GUARD::S(B),XR(a)
        • R(a);N_GUARD::S(B)
      • Refutation
        • R(a);
  • Actual
    • B(A);
    • Threat
      • S(B)
    • Vars
      • R(a);CHECK,N_GUARD::S(B),XR(a)
      • R(a);N_GUARD::S(B)
      • R(a);SBLOCK::QAR1(D)
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