MESON Chess Problem Database

Problem Display
PID: 184943 (2NbRnN1/1b2B2B/r3n2K/3pk3/3R4/6p1/2QP4/8 w - - 0 1)

Grunenwald, Alphonse

Bulletin Ouvrier des Echecs, 1951

2NbRnN1/1b2B2B/r3n2K/3pk3/3R4/6p1/2QP4/8

#2

9 + 8

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qc3#
    • 1...Ba5
      • 2.Bf6#
    • 1...Bb6
      • 2.Bf6#
    • 1...Bc7
      • 2.Bf6#
    • 1...Sxd4+
      • 2.Bd6#
    • 1...Sf4+
      • 2.Bf6#
    • 1...Sc5+
      • 2.Bf6#
    • 1...Sg5+
      • 2.Bf6#
    • 1...Sc7+
      • 2.Bf6#
    • 1...Sg7+
      • 2.Bf6#
  • Tries
    • 1.Bd6+?
      • 1...Kxd4
        • 2.Qd3#
        • 2.Qc3#
      • 1...Rxd6!
    • 1.Rxd5+?
      • 1...Kf4
        • 2.Qe4#
        • 2.Qf5#
      • 1...Kxd5
        • 2.Qe4#
      • 1...Bxd5!
    • 1.Qc7+?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Bxc7
        • 2.Bf6#
      • 1...Sxc7+
        • 2.Bf6#
      • 1...Rd6!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qf5#
      • 1...Sd4+
        • 2.Bd6#
      • 1...Sxf4+
        • 2.Bf6#
      • 1...Sc5+
        • 2.Bd6#
      • 1...Sg5+
        • 2.Bd6#
      • 1...Sc7+
        • 2.Bd6#
      • 1...Sg7+
        • 2.Bd6#
      • 1...Kxf4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
    • B(g);N_GUARD::B(E)
    • S(e);CHECK,SBLOCK,XR(C)::R(H)+B(E),DCHECK
    • S(e);CHECK::R(H)+B(E),DCHECK
  • Tries
    • Try
      • B(E);CHECK,P_PINS(e)
      • Refutation
        • R(d);XB(E)
    • Try
      • R(C);CHECK,XP(b)
      • Vars
        • K(c);P-FLIGHT,XR(C)::QAB1(A)
      • Refutation
        • B(f);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
        • B(g);XQ(A)::B(E)
        • S(e);CHECK,XQ(A)::R(H)+B(E),DCHECK
      • Refutation
        • R(d);P_SPINR(d)
  • Actual
    • R(C);
    • Threat
      • QAR1(A)
    • Vars
      • S(e);CHECK::R(H)+B(E),DCHECK
      • S(e);CHECK,SBLOCK,XR(C)::R(H)+B(E),DCHECK
      • K(c);S_FLIGHT,XR(C)::QAR1(A)
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