MESON Chess Problem Database

Problem Display
PID: 218549 (1n2r3/1N5B/1PN5/3kP2p/8/8/8/1Q5K w - - 0 1)

Noack, Ludwig

Berlin Chess Congress, 1881

1n2r3/1N5B/1PN5/3kP2p/8/8/8/1Q5K

#2

7 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qd3#
    • 1...Re6
      • 2.Qe4#
      • 2.Qb5#
  • Tries
    • 1.Be4+?
      • 1...Kc4
        • 2.Qd3#
        • 2.Qb4#
      • 1...Ke6!
    • 1.Bf5?
      • threat
        • 2.Qe4#
        • 2.Qb5#
      • 1...Kc4
        • 2.Qd3#
      • 1...Rxe5
        • 2.Qb5#
      • 1...Sxc6
        • 2.Qe4#
      • 1...Sa6
        • 2.Qe4#
      • 1...Sd7
        • 2.Qe4#
      • 1...Kxc6!
  • Keys
    • 1.e6!
      • threat
        • 2.Qe4#
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxc6
        • 2.Be4#
      • 1...Kxe6
        • 2.Qf5#
      • 1...Rxe6
        • 2.Qb5#

There are these versions: 216226

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A)
  • Tries
    • Try
      • B(G);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(G);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
        • R(d);XP(C)::QAR2(A)
        • S(c);SBLOCK,XS(E)::QAB1(A)
        • S(c);::QAB1(A)
      • Refutation
        • K(a);S_FLIGHT,XS(E)
  • Actual
    • P(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(a);S_FLIGHT::QAB1(A)
      • K(a);S_FLIGHT,XS(E)::B(G)
      • K(a);S_FLIGHT,XP(C)::QAB1(A)
      • R(d);SBLOCK,XP(C)::QAR2(A)
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