MESON Chess Problem Database

Problem Display
PID: 87496 (8/4n3/4Q3/8/3kN3/1K6/3B4/8 w - - 0 1)

Dragan, Nicholae A

Buletin Problemistic, 1970

8/4n3/4Q3/8/3kN3/1K6/3B4/8

#2

4 + 2

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qc4#
  • Tries
    • 1.Sf6?
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Qd5#
      • 1...Kc5!
    • 1.Bc3+?
      • 1...Kd3
        • 2.Sf2#
        • 2.Sc5#
      • 1...Ke3!
    • 1.Bf4?
      • threat
        • 2.Qc4#
      • 1...Kd3
        • 2.Qc4#
      • 1...Sd5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe3#
      • 1...Kd3
        • 2.Qe3#
      • 1...Kc5
        • 2.Be3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sf5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAB1(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(D)
      • Vars
        • K(a);P-FLIGHT::QAR1(D)
        • S(b);N_GUARD::QAR1(D),XS(b)
        • S(b);N_GUARD::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • QAR1(D)
      • Vars
        • K(a);P-FLIGHT::QAB1(D)
      • Refutation
        • S(b);
  • Actual
    • S(C);
    • Threat
      • QAB1(D)
    • Vars
      • K(a);P-FLIGHT::QAR1(D)
      • K(a);S_FLIGHT::B(A)
      • S(b);N_GUARD::QAR1(D),XS(b)
      • S(b);N_GUARD::QAR1(D)
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