MESON Chess Problem Database

Problem Display
PID: 116810 (5K2/1B6/3kp3/3N2Q1/8/8/8/8 w - - 0 1)

Janocko, Jan

Pat a Mat, 1990

5K2/1B6/3kp3/3N2Q1/8/8/8/8

#2

4 + 2

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd7
      • 2.Qe7#
    • 1...exd5
      • 2.Qe7#
    • 1...e5
      • 2.Qe7#
  • Tries
    • 1.Kf7?
      • 1...Kd7
        • 2.Qe7#
      • 1...exd5
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc5!
    • 1.Ke8?
      • 1...exd5
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc5!
    • 1.Sc3?
      • 1...Kd7
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc7!
    • 1.Se3?
      • 1...Kd7
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc7!
    • 1.Sb4?
      • 1...Kd7
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc7!
    • 1.Sf4?
      • 1...Kd7
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc7!
    • 1.Sb6?
      • 1...e5
        • 2.Qe7#
      • 1...Kc7!
    • 1.Sc7?
      • 1...Kd7
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kxc7!
    • 1.Qc1?
      • threat
        • 2.Qc7#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kd7
        • 2.Qc7#
      • 1...e5
        • 2.Qc6#
      • 1...exd5!
    • 1.Qf4+?
      • 1...Kc5
        • 2.Qb4#
      • 1...Kd7
        • 2.Qc7#
      • 1...e5!
    • 1.Qf6?
      • 1...Kd7
        • 2.Qe7#
      • 1...Kc5!
    • 1.Qg7?
      • threat
        • 2.Qc7#
      • 1...exd5
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#
      • 1...Kc5!
  • Keys
    • 1.Qh4!
      • 1...Kc5
        • 2.Qb4#
      • 1...Ke5
        • 2.Qf4#
      • 1...Kd7
        • 2.Qe7#
      • 1...exd5
        • 2.Qe7#
      • 1...e5
        • 2.Qe7#

Anticipated by 107155(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR1(B)
    • P(b);XS(A)::QAB1(B)
    • P(b);::QAB1(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);XS(A)::QAB1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(D);P-FLIGHT
      • Vars
        • P(b);XS(A)::QAB1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);P-FLIGHT::QAR1(B)
        • P(b);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XS(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
        • K(a);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);P_SPINP(b)
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(a);N_SPINP(b),P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(b);XS(A)::QAB1(B)
        • P(b);::QAB1(B)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR1(B)
      • P(b);XS(A)::QAB1(B)
      • P(b);::QAB1(B)
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