MESON Chess Problem Database

Problem Display
PID: 217452 (4K3/4R3/4b3/3NkN2/4p3/4p3/8/4Q3 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1992

4K3/4R3/4b3/3NkN2/4p3/4p3/8/4Q3

#2

5 + 4

15148 Sadier Collection 2020
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sdxe3?
      • 1...Kf4
        • 2.Qg3#
      • 1...Kf6!
    • 1.Sfxe3?
      • 1...Kd4
        • 2.Qc3#
      • 1...Kd6!
    • 1.Qd1?
      • 1...Kxf5
        • 2.Qh5#
      • 1...e2!
    • 1.Qf1?
      • 1...Kxd5
        • 2.Qb5#
      • 1...e2!
  • Keys
    • 1.Qe2!
      • 1...Kxd5
        • 2.Qb5#
      • 1...Kxf5
        • 2.Qh5#

Anticipated by 206996(1859), 23002(1881), 222837(1884), 193956(1916), 21141(1917), 71194(1917)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(B);XP(a)
      • Vars
        • K(c);N_SPINB(d),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINB(d),S_FLIGHT
    • Try
      • S(C);XP(a)
      • Vars
        • K(c);N_SPINB(d),S_FLIGHT::QAB1(A)
      • Refutation
        • K(c);N_SPINB(d),S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINB(d),OGATEB,P-FLIGHT,XS(C)::QAR2(A)
      • Refutation
        • P(a);
    • Try
      • Q(A);
      • Vars
        • K(c);N_SPINB(d),OGATEB,P-FLIGHT,XS(B)::QAR2(A)
      • Refutation
        • P(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);N_SPINB(d),OGATEB,P-FLIGHT,XS(B)::QAR2(A)
      • K(c);N_SPINB(d),OGATEB,P-FLIGHT,XS(C)::QAR2(A)
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