MESON Chess Problem Database

Problem Display
PID: 58072 (7B/3p1p2/nR1N4/3k4/8/3pK3/6P1/4Q3 w - - 0 1)

van Dijk, Nils Gustav Gerard

Chess Life, 1958

7B/3p1p2/nR1N4/3k4/8/3pK3/6P1/4Q3

#2

6 + 5

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
    • 1...Ke6
      • 2.Kd4#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...f6!
    • 1.Kf3?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...f6!
    • 1.Kf4?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...f6!
    • 1.Qc3?
      • threat
        • 2.Qe5#
        • 2.Qc4#
      • 1...Ke6
        • 2.Qe5#
      • 1...f6!
    • 1.Qh4?
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qd4#
      • 1...Ke6
        • 2.Qe4#
      • 1...f6!
    • 1.Qa5+?
      • 1...Ke6
        • 2.Qe5#
      • 1...Sc5!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Kc5
        • 2.Qd4#
        • 2.Qa5#
      • 1...Ke6
        • 2.Qe5#
      • 1...f6!
    • 1.Qf1?
      • threat
        • 2.Qf5#
      • 1...Ke6
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf5#
      • 1...Kc5!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qf5#
      • 1...Kc5
        • 2.Ke4#
      • 1...Ke6
        • 2.Qxf7#
      • 1...f5
        • 2.Qxf5#

Anticipated by 18401(1955-1956)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
    • K(b);S_FLIGHT::QAR(A)+K(C)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • K(C);P-FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • K(C);S_FLIGHT
      • Threat
        • QAR1(A)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
        • K(b);S_FLIGHT::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • K(b);S_FLIGHT::QAB1(A),XP(e)
        • P(e);::QAR2(A),XP(e)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(b);P-FLIGHT::QAB(A)+K(C)
      • K(b);S_FLIGHT::QAB1(A),XP(e)
      • P(e);::QAR2(A),XP(e)
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