MESON Chess Problem Database

Problem Display
PID: 11522 (1Q2N1K1/2rp1p2/4k1p1/2p1b1BN/4PP2/8/4B3/q7 w - - 0 1)

Sachsel, Robert

Chess, 1939

1Q2N1K1/2rp1p2/4k1p1/2p1b1BN/4PP2/8/4B3/q7

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Bc4#
    • 1...gxh5
      • 2.f5#
  • Tries
    • 1.Sxc7+?
      • 1...Kd6
        • 2.Qb6#
      • 1...Bxc7!
    • 1.Bf6?
      • threat
        • 2.Shg7#
        • 2.Bg4#
      • 1...gxh5
        • 2.f5#
      • 1...d5
        • 2.Bg4#
      • 1...d6
        • 2.Bg4#
      • 1...Qd1
        • 2.Shg7#
      • 1...Qg1
        • 2.Shg7#
      • 1...Bxf6!
    • 1.Qb3+?
      • 1...d5
        • 2.Qxd5#
      • 1...c4!
  • Keys
    • 1.Qd8!
      • threat
        • 2.Qe7#
      • 1...Bd6
        • 2.Bc4#
      • 1...Bf6
        • 2.Bg4#
      • 1...d5
        • 2.Qxd5#
      • 1...d6
        • 2.Sxc7#
      • 1...f6
        • 2.Shg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(c);S_CUTP(g)::B(A)
    • P(e);N_GUARD,XS(E)::P(C)
  • Tries
    • Try
      • S(G);CHECK,XR(f)
      • Vars
        • K(d);P-FLIGHT::QAR2(F)
      • Refutation
        • B(c);XS(G)
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);N_GUARD,XS(E)::P(C)
        • P(g);::B(A)
        • Q(a);::S(E)
      • Refutation
        • B(c);XB(D)
    • Try
      • Q(F);CHECK
      • Vars
        • P(g);P_SPINP(g)::QAB1(F),XP(g)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F)
    • Vars
      • B(c);S_CUTP(g)::B(A)
      • B(c);S_CUTP(h)::B(A)
      • P(g);OGATE::QAB1(F),XP(g)
      • P(g);S_CUTB(c)::S(G),XR(f)
      • P(h);S_CUTB(c)::S(E)
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