MESON Chess Problem Database

Problem Display
PID: 6988 (8/BP6/2p5/1nN5/KNknb2R/1pq2Q1r/4r3/2R2B2 w - - 0 1)

Fuhrer, Viktor

1st Prize, La Settimana Enigmistica, 1935

8/BP6/2p5/1nN5/KNknb2R/1pq2Q1r/4r3/2R2B2

#2

9 + 9

23 Die Schwalbe 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qf7#
    • 1...Bc2
      • 2.Qf7#
    • 1...Bd5
      • 2.Bxe2#
    • 1...Bh7
      • 2.Qf7#
    • 1...Sa3
      • 2.Rxc3#
    • 1...Sd6
      • 2.Rxc3#
    • 1...Sxa7
      • 2.Rxc3#
    • 1...Sc7
      • 2.Rxc3#
  • Tries
    • 1.Sxb3?
      • threat
        • 2.Sd2#
        • 2.Sa5#
      • 1...Qxc1
        • 2.Sa5#
      • 1...Sxb3
        • 2.Bxe2#
        • 2.Qf7#
      • 1...Sxf3
        • 2.Sa5#
        • 2.Bxe2#
      • 1...Sxa7
        • 2.Rxc3#
      • 1...Bc2
        • 2.Qxc6#
        • 2.Qf7#
      • 1...Bd3
        • 2.Sa5#
        • 2.Qxc6#
      • 1...Sc2
        • 2.Sa5#
        • 2.Qf7#
      • 1...Qc2!
    • 1.Sxe4?
      • threat
        • 2.Sd2#
      • 1...Sxa7
        • 2.Rxc3#
      • 1...Qxc1!
    • 1.Bxe2+?
      • 1...Bd3
        • 2.Bxd3#
        • 2.Qf7#
      • 1...Sxe2!
    • 1.Rxe4?
      • threat
        • 2.Bxe2#
        • 2.Qf7#
      • 1...Qxc1
        • 2.Bxe2#
      • 1...Sxa7
        • 2.Rxc3#
      • 1...Qc2
        • 2.Bxe2#
      • 1...Rh2
        • 2.Qd3#
        • 2.Qf7#
      • 1...Rh5
        • 2.Bxe2#
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Rh6
        • 2.Bxe2#
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Rh7
        • 2.Bxe2#
        • 2.Qxe2#
        • 2.Qd3#
      • 1...Sd6
        • 2.Bxe2#
        • 2.Rxc3#
      • 1...Sc7
        • 2.Bxe2#
        • 2.Rxc3#
      • 1...Rxf3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Se5#
      • 1...Sxf3
        • 2.Bxe2#
      • 1...Sxa7
        • 2.Rxc3#
      • 1...Bd3
        • 2.Qxc6#
      • 1...Sc2
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(g);N_GUARD,P_SPINS(f)::QAB(C)
    • B(g);N_GUARD,N_SPINQ(c),P_SPINS(f)::QAB(C)
    • B(g);N_GUARD,P_SPINS(f)::B(B),XR(a)
    • S(h);N_GUARD::R1(A),XQ(c)
    • S(h);N_GUARD,XB(H)::R1(A),XQ(c)
  • Tries
    • Try
      • S(G);XP(b)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINQ(c),XR(A)::S(G)
        • S(h);N_GUARD,XB(H)::R1(A),XQ(c)
      • Refutation
        • Q(c);P_PINS(G)
    • Try
      • S(G);XB(g)
      • Threat
        • S(G)
      • Vars
        • S(h);N_GUARD,XB(H)::R1(A),XQ(c)
      • Refutation
        • Q(c);N_SPINQ(c),XR(A)
    • Try
      • B(B);CHECK,XR(a)
      • Refutation
        • S(f);P_SPINB(g),XB(B)
    • Try
      • R(F);P_PINS(f),XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);N_SPINQ(c),XR(A)::B(B),XR(a)
        • S(h);N_GUARD,XB(H)::R1(A),XQ(c)
        • Q(c);::B(B),XR(a)
      • Refutation
        • R(d);XQ(C)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • S(f);N_GUARD,P_SPINB(g),XQ(C)::B(B),XR(a)
      • S(h);N_GUARD,XB(H)::R1(A),XQ(c)
      • B(g);N_SPINR(a),OGATE,P_SPINS(f)::QAR2(C),XP(i)
      • S(f);N_GUARD,N_SPINQ(c),P_SPINB(g)::QAB(C)
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