MESON Chess Problem Database

Problem Display
PID: 245829 (bq1R4/6R1/2nN1k1P/3B4/1r2PK2/2N5/8/B7 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Europa-Rochade, 2001

bq1R4/6R1/2nN1k1P/3B4/1r2PK2/2N5/8/B7

#2

9 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd6+
      • 2.Rxd6#
    • 1...Qa7
      • 2.Se8#
    • 1...Qb5
      • 2.Se8#
      • 2.Rf8#
    • 1...Qb6
      • 2.Se8#
      • 2.Rf8#
    • 1...Qb7
      • 2.Se8#
    • 1...Qc8
      • 2.Se8#
    • 1...Rxe4+
      • 2.Sxe4#
    • 1...Sd4
      • 2.e5#
    • 1...Se5
      • 2.Se8#
  • Tries
    • 1.Rxb8?
      • threat
        • 2.Se8#
        • 2.Rf8#
      • 1...Rxe4+
        • 2.Scxe4#
        • 2.Sdxe4#
      • 1...Sxb8
        • 2.Se8#
      • 1...Rb7
        • 2.Se8#
      • 1...Se5
        • 2.Se8#
      • 1...Sd8
        • 2.Se8#
      • 1...Rxb8!
  • Keys
    • 1.Bg8!
      • threat
        • 2.Sd5#
      • 1...Qxd6+
        • 2.Rxd6#
      • 1...Rxe4+
        • 2.Sxe4#
      • 1...Sd4
        • 2.e5#
      • 1...Se5
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(e);CHECK,OGATE,XS(F)::R(I),XQ(e)
    • Q(e);N_PINS(F)::S(F)
    • R(a);CHECK,XP(C)::B(A)+S(B),DCHECK,XR(a)
    • S(b);N_PINP(C)::P(C)
    • S(b);N_PINS(F)::S(F)
  • Tries
    • Try
      • R(I);N_SPINS(F),XQ(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XR(I)::S(F)
        • R(a);N_PINP(C)::S(F)
        • S(b);::S(F)
      • Refutation
        • R(a);N_PINP(C),XR(I)
  • Actual
    • B(E);
    • Threat
      • B(A)+S(B),DCHECK
    • Vars
      • Q(e);CHECK,OGATE,XS(F)::R(I),XQ(e)
      • R(a);CHECK,XP(C)::B(A)+S(B),DCHECK,XR(a)
      • S(b);N_PINP(C)::P(C)
      • S(b);N_PINS(F)::S(F)
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