MESON Chess Problem Database

Problem Display
PID: 224689 (7B/3K4/8/n2k1P2/3NNr2/4pp2/n7/1Q6 w - - 0 1)

von Hoene, HH

The Sunny South, 1887

7B/3K4/8/n2k1P2/3NNr2/4pp2/n7/1Q6

#2

6 + 6

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc4
      • 2.Qb5#
    • 1...Rxe4
      • 2.Qb5#
    • 1...Sc4
      • 2.Qb7#
  • Tries
    • 1.Qb6?
      • threat
        • 2.Qe6#
      • 1...Kc4
        • 2.Qb5#
      • 1...Rxe4
        • 2.Qb5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Kxe4!
    • 1.Qb7+?
      • 1...Kc4
        • 2.Qb5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sxb7!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Sxe3#
      • 1...Kc4
        • 2.Sxe3#
      • 1...Kxe4
        • 2.Sb4#
      • 1...Rxe4
        • 2.Qb5#
      • 1...Sc4
        • 2.Qb7#
      • 1...e2
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT::QAB1(A)
    • R(d);SBLOCK,XS(C)::QAR2(A)
    • S(e);N_GUARD,SBLOCK::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(f);S_FLIGHT::QAB1(A)
        • R(d);SBLOCK,XS(C)::QAR2(A)
        • S(e);N_GUARD::QAB1(A),XS(e)
      • Refutation
        • K(f);S_FLIGHT,XS(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(A)
        • S(e);N_GUARD,P_SPINS(e)::QAB1(A),XS(e)
      • Refutation
        • S(e);XQ(A)
  • Actual
    • S(B);
    • Threat
      • S(B),XP(b)
    • Vars
      • K(f);S_FLIGHT::S(B),XP(b)
      • K(f);S_FLIGHT,XS(C)::QAB(A)+S(B)
      • R(d);SBLOCK,XS(C)::QAR2(A)
      • S(e);N_GUARD,SBLOCK::QAB(A)
      • P(b);::S(B)
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