MESON Chess Problem Database

Problem Display
PID: 185051 (8/3R3n/8/3NkP2/n3P1p1/8/3QR1K1/8 w - - 0 1)

Kolodnas, Zelikas

Basler Nachrichten, 1939

8/3R3n/8/3NkP2/n3P1p1/8/3QR1K1/8

#2

7 + 4

15601 Albrecht-Leiss-Degener Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qc3#
      • 2.Qxb2#
    • 1...Sc3
      • 2.Qxc3#
    • 1...Sc5
      • 2.Qc3#
      • 2.Qb2#
    • 1...Sb6
      • 2.Qc3#
      • 2.Qb2#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Sxg4#
        • 2.Qd6#
      • 1...Sxf6
        • 2.Re7#
        • 2.Qd6#
      • 1...g3
        • 2.Sg4#
        • 2.Qd6#
      • 1...Kxf6!
    • 1.Qb2+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sxb2!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sxg4#
      • 1...Kxe4
        • 2.Qd4#
      • 1...Kf4
        • 2.Sc4#
      • 1...Kf6
        • 2.Sxg4#
      • 1...Sf6
        • 2.Sc4#
      • 1...g3
        • 2.Sg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(a);N_GUARD::QAB(A),XS(a)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT,XS(E)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB(A),XS(a)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • S(E);
    • Threat
      • S(E),XP(b)
    • Vars
      • K(c);P-FLIGHT,XP(D)::QAR1(A)
      • K(c);S_FLIGHT::QAB(A)+S(E)
      • K(c);S_FLIGHT::S(E),XP(b)
      • S(d);SBLOCK::S(E)
      • P(b);::S(E)
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