MESON Chess Problem Database

Problem Display
PID: 52926 (8/1N5Q/r6n/p1p1b3/P1k1P3/K2N2q1/nrPP4/1b4B1 w - - 0 1)

Anders, Wilhelm

Schach-Echo, 1933

8/1N5Q/r6n/p1p1b3/P1k1P3/K2N2q1/nrPP4/1b4B1

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.Sxe5#
    • 1...Qh4
      • 2.Sxe5#
    • 1...Qg2
      • 2.Sxe5#
    • 1...Qg4
      • 2.Sxe5#
    • 1...Qg6
      • 2.Sxe5#
    • 1...Qg8
      • 2.Sxe5#
    • 1...Rb6
      • 2.Sxa5#
    • 1...Rc6
      • 2.Sxa5#
    • 1...Rd6
      • 2.Sxa5#
    • 1...Re6
      • 2.Sxa5#
    • 1...Rf6
      • 2.Sxa5#
    • 1...Rg6
      • 2.Sxa5#
    • 1...Sc3
      • 2.Sxb2#
  • Tries
    • 1.Qf7+?
      • 1...Re6
        • 2.Sxa5#
        • 2.Qxe6#
      • 1...Sxf7!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Qd5#
      • 1...Qxd3+
        • 2.Qxd3#
      • 1...Rb3+
        • 2.cxb3#
      • 1...Qg8
        • 2.Sxe5#
      • 1...Rd6
        • 2.Sxa5#
      • 1...Bd6
        • 2.Qe6#
      • 1...Sc3
        • 2.Sxb2#
      • 1...Sb4
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 10
  • Sets
    • Q(d);N_PINS(E)::S(E),XB(h)
    • R(i);N_GUARD::S(H),XP(f)
    • S(b);N_PINS(E)::S(E),XR(c)
  • Tries
    • Try
      • Q(I);CHECK
      • Refutation
        • S(j);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • Q(d);CHECK,OGATE,XS(E)::QAB1(I),XQ(d)
      • R(c);CHECK,N_PINS(E),OGATE::P(B),XR(c)
      • Q(d);N_PINS(E)::S(E),XB(h)
      • R(i);N_GUARD::S(H),XP(f)
      • B(h);S_CUTR(i)::QAB(I)
      • S(b);N_PINS(E)::S(E),XR(c)
      • S(b);S_CUTR(c)::QAB1(I)
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