MESON Chess Problem Database

Problem Display
PID: 21059 (2Q2BBb/5N1b/2N2kpp/3p4/6P1/8/3pr3/Kn6 w - - 0 1)

Kohnlein, Friedrich

Deutsches Wochenschach, 1916

2Q2BBb/5N1b/2N2kpp/3p4/6P1/8/3pr3/Kn6

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...h5
      • 2.g5#
  • Tries
    • 1.Be7+?
      • 1...Kg7
        • 2.Qf8#
      • 1...Rxe7!
    • 1.Qd8+?
      • 1...Re7
        • 2.Qxe7#
      • 1...Ke6+!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sce5#
      • 1...Ke6+
        • 2.Sce5#
      • 1...Re5
        • 2.Scxe5#
      • 1...Re6
        • 2.Qf1#
      • 1...Re7
        • 2.Sxe7#
      • 1...Re8
        • 2.Se7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • P(g);N_GUARD::P(B)
  • Tries
    • Try
      • B(F);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(E)
      • Refutation
        • R(c);XB(F)
    • Try
      • Q(E);CHECK
      • Vars
        • R(c);N_GUARD,P_SPINR(c)::QAB1(E),XR(c)
      • Refutation
        • K(e);CHECK,P-FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAR(E)+S(C)
    • Vars
      • K(e);CHECK,P-FLIGHT::QAR(E)+S(C)
      • R(c);::QAR(E)+S(C),XR(c)
      • R(c);OGATE,SBLOCK::QAR(E)
      • R(c);N_GUARD::QAR(E)+S(C),XR(c)
      • R(c);N_GUARD::QAR(E)+S(C)
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