MESON Chess Problem Database

Problem Display
PID: 195982 (b1QnB1r1/2qP4/2k1NR2/1pB1b1p1/1n1RK3/8/8/8 w - - 0 1)

Hoffmann, Fritz

Sachova skladba, 1986

b1QnB1r1/2qP4/2k1NR2/1pB1b1p1/1n1RK3/8/8/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc8
      • 2.dxc8Q#
    • 1...Rxe8
      • 2.dxe8Q#
      • 2.dxe8B#
    • 1...Bxd4
      • 2.Qxc7#
    • 1...Bd6
      • 2.Rxd6#
    • 1...Bxf6
      • 2.Rd6#
      • 2.Qxc7#
    • 1...Sb7
      • 2.d8S#
    • 1...Sf7
      • 2.d8S#
  • Tries
    • 1.Rc4?
      • threat
        • 2.Sd4#
        • 2.Sxd8#
      • 1...Qxc8
        • 2.dxc8Q#
      • 1...Bxf6
        • 2.Qxc7#
      • 1...Sxe6
        • 2.d8S#
      • 1...Bd4
        • 2.Sxd4#
        • 2.Sxd8#
        • 2.Qxc7#
      • 1...Sb7
        • 2.Sd4#
        • 2.Sd8#
        • 2.d8S#
      • 1...Sf7
        • 2.Sd4#
        • 2.Sd8#
        • 2.d8S#
      • 1...bxc4!
    • 1.Rd5?
      • threat
        • 2.Sd4#
        • 2.Sxd8#
      • 1...Qxc8
        • 2.dxc8Q#
      • 1...Bxf6
        • 2.Rd6#
        • 2.Qxc7#
      • 1...Sxe6
        • 2.d8S#
      • 1...Bd4
        • 2.Sxd4#
        • 2.Sxd8#
        • 2.Rd6#
        • 2.Qxc7#
      • 1...Sb7
        • 2.Sd4#
        • 2.Sd8#
        • 2.d8S#
      • 1...Sf7
        • 2.Sd4#
        • 2.Sd8#
        • 2.d8S#
      • 1...Sxd5!
    • 1.Qa6+?
      • 1...Qb6
        • 2.Qxb6#
      • 1...Sxa6!
    • 1.Qxa8+?
      • 1...Sb7
        • 2.d8S#
      • 1...Qb7!
  • Keys
    • 1.Ba7!
      • threat
        • 2.Sxd8#
      • 1...Qxc8
        • 2.dxc8Q#
      • 1...Bxf6
        • 2.Qxc7#
      • 1...Sxe6
        • 2.d8S#
      • 1...Sb7
        • 2.Sd8#
        • 2.d8S#
      • 1...Sf7
        • 2.Sd8#
        • 2.d8S#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(f);N_SPINQ(f),OGATE,XQ(G)::PXQ(f)=Q
    • R(i);OGATE,XB(H)::PXR(i)=Q
    • B(c);N_GUARD,XR(A)::QAR1(G),XQ(f)
    • B(c);N_GUARD::R1(A),XB(c)
    • S(h);OGATE::P=S
  • Tries
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_SPINQ(f),OGATE,XQ(G)::PXQ(f)=Q
        • B(c);N_GUARD,XR(E)::QAR1(G),XQ(f)
        • S(h);OGATE,P_SPINS(h),XS(D)::P=S
      • Refutation
        • P(b);XR(A)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(f);N_SPINQ(f),OGATE,XQ(G)::PXQ(f)=Q
        • S(h);OGATE,P_SPINS(h),XS(D)::P=S
      • Refutation
        • S(a);XR(A)
    • Try
      • Q(G);CHECK,N_PINQ(f)
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::QAR1(G),XQ(f)
      • Refutation
        • S(a);XQ(G)
    • Try
      • Q(G);CHECK,N_PINQ(f),XB(g)
      • Vars
        • S(h);OGATE,P_SPINS(h)::P=S
      • Refutation
        • Q(f);P_SPINQ(f)
  • Actual
    • B(C);
    • Threat
      • R(E)+S(D),DCHECK,XS(h)
    • Vars
      • Q(f);N_SPINQ(f),OGATE,XQ(G)::PXQ(f)=Q
      • B(c);N_GUARD,XR(E)::QAR1(G),XQ(f)
      • S(h);OGATE,P_SPINS(h),XS(D)::P=S
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