MESON Chess Problem Database

Problem Display
PID: 183959 (6RN/4pqbp/4p2p/5bBk/3Qp1R1/8/4B3/5K2 w - - 0 1)

Piller, Friedrich

Suomen Shakki, 1980

6RN/4pqbp/4p2p/5bBk/3Qp1R1/8/4B3/5K2

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Rh4#
    • 1...Be5
      • 2.Rh4#
    • 1...Bf6
      • 2.Rh4#
    • 1...Bf8
      • 2.Rh4#
    • 1...Bxh8
      • 2.Rh4#
  • Tries
    • 1.Qg1?
      • threat
        • 2.Rh4#
        • 2.Qh2#
        • 2.Qh1#
      • 1...Bg6+
        • 2.Rf4#
      • 1...hxg5
        • 2.Qh2#
        • 2.Qh1#
      • 1...Be5
        • 2.Rh4#
      • 1...Bxg4+!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qh2#
      • 1...Bxg4+
        • 2.Bf6#
      • 1...Bg6+
        • 2.Rf4#
      • 1...Bxe5
        • 2.Rh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(h);XQ(C)::B(B)+R(D),DCHECK
    • B(h);::B(B)+R(D),DCHECK
    • B(h);XS(G)::B(B)+R(D),DCHECK
  • Tries
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);CHECK,N_GUARD::B(B)+R(D)
        • B(h);::B(B)+R(D),DCHECK
      • Refutation
        • B(b);CHECK,P_SPINB(b),XR(D)
  • Actual
    • Q(C);
    • Threat
      • QAR(C)
    • Vars
      • B(b);CHECK,OGATEB,P_SPINB(b),XR(D)::QAR(C)+B(E)
      • B(b);CHECK,N_GUARD::B(B)+R(D)
      • B(h);XQ(C)::B(B)+R(D),DCHECK
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