MESON Chess Problem Database

Problem Display
PID: 94576 (5k2/1n6/4Q2K/8/1R2n3/8/8/2B5 w - - 0 1)

Grolman, Lev

Vecherni Magadan, 1997

5k2/1n6/4Q2K/8/1R2n3/8/8/2B5

#2

4 + 3

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd2
      • 2.Rf4#
    • 1...Sf2
      • 2.Rf4#
    • 1...Sc3
      • 2.Rf4#
    • 1...Sec5
      • 2.Rf4#
    • 1...Sa5
      • 2.Rb8#
    • 1...Sbc5
      • 2.Rb8#
  • Tries
    • 1.Kg6?
      • threat
        • 2.Bh6#
        • 2.Qf7#
      • 1...Sd2
        • 2.Rf4#
        • 2.Qf7#
      • 1...Sed6
        • 2.Bh6#
      • 1...Sbd6
        • 2.Bh6#
      • 1...Sd8
        • 2.Bh6#
      • 1...Sg5!
    • 1.Bb2?
      • threat
        • 2.Bg7#
      • 1...Sc3
        • 2.Rf4#
      • 1...Sf6!
    • 1.Rxe4?
      • threat
        • 2.Rf4#
        • 2.Qe8#
      • 1...Sd8
        • 2.Ba3#
        • 2.Qe8#
      • 1...Sd6!
    • 1.Rxb7?
      • threat
        • 2.Rb8#
        • 2.Qf7#
        • 2.Qc8#
      • 1...Sg5
        • 2.Ba3#
        • 2.Rb8#
        • 2.Qc8#
      • 1...Sf6
        • 2.Ba3#
        • 2.Qf7#
      • 1...Sd6!
    • 1.Qe7+?
      • 1...Kg8
        • 2.Qg7#
        • 2.Qe8#
      • 1...Kxe7!
  • Keys
    • 1.Ba3!
      • 1...Sg5
        • 2.Rf4#
        • 2.Rxb7#
      • 1...Sd2
        • 2.Rf4#
        • 2.Rxb7#
      • 1...Sf2
        • 2.Rf4#
        • 2.Rxb7#
      • 1...Sc3
        • 2.Rf4#
        • 2.Rxb7#
      • 1...Sg3
        • 2.Rf4#
        • 2.Rxb7#
      • 1...Sec5
        • 2.Rf4#
      • 1...Sed6
        • 2.Rf4#
      • 1...Sf6
        • 2.Rxb7#
      • 1...Sa5
        • 2.Rxe4#
        • 2.Rb8#
      • 1...Sbc5
        • 2.Rb8#
      • 1...Sbd6
        • 2.Rb8#
      • 1...Sd8
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(a);OGATE::R(B)
    • S(b);OGATE::R(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::B(A)
        • S(b);::B(A)
      • Refutation
        • S(a);
    • Try
      • B(A);
      • Threat
        • B(A)
      • Vars
        • S(a);OGATE::R(B)
      • Refutation
        • S(a);
    • Try
      • R(B);XS(a)
      • Threat
        • DUALS(2)
      • Refutation
        • S(b);
    • Try
      • R(B);XS(b)
      • Threat
        • DUALS(3)
      • Refutation
        • S(a);
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • B(A);
    • Vars
      • S(a);OGATE::R(B)
      • S(a);N_GUARD::B(A)+R(B),XS(b)
      • S(b);OGATE::R(B)
      • S(b);N_GUARD::B(A)+R(B),XS(a)
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