MESON Chess Problem Database

Problem Display
PID: 142786 (Q7/5R2/3pp3/1P2kp2/8/3K4/7P/8 w - - 0 1)

Lington, IS

The Chess Player's Chronicle (Sampson), 1881

Q7/5R2/3pp3/1P2kp2/8/3K4/7P/8

#2

5 + 4

158 Brentano's Chess Monthly 1881
119 Tidskrift for Schack 1909
3713 Snap 2014

SOLUTION

  • SOUND
  • Sets
    • 1...f4
      • 2.Qe4#
    • 1...d5
      • 2.Qb8#
  • Tries
    • 1.Ke3?
      • 1...d5
        • 2.Qb8#
      • 1...f4+!
    • 1.Rf8?
      • 1...d5
        • 2.Qb8#
      • 1...f4
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qg2?
      • 1...Kf4
        • 2.Qg3#
      • 1...f4
        • 2.Qe4#
        • 2.Qg5#
      • 1...d5!
    • 1.Qf3?
      • 1...f4
        • 2.Qe4#
        • 2.Qh5#
      • 1...d5!
    • 1.Qc6?
      • 1...f4
        • 2.Qe4#
      • 1...d5
        • 2.Qc7#
      • 1...Kf4!
    • 1.Qb7?
      • 1...d5
        • 2.Qc7#
        • 2.Qb8#
      • 1...f4
        • 2.Qe4#
      • 1...Kf4!
    • 1.Qa1+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf4!
    • 1.Qa4?
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Qd4#
      • 1...d5!
    • 1.Qa7?
      • threat
        • 2.Qd4#
      • 1...Kd5
        • 2.Qd4#
      • 1...d5
        • 2.Qb8#
        • 2.Qc7#
      • 1...Kf4!
    • 1.Qh8+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kf4!
    • 1.h3?
      • 1...d5
        • 2.Qb8#
      • 1...f4
        • 2.Qe4#
      • 1...Kf4!
    • 1.h4?
      • 1...d5
        • 2.Qb8#
      • 1...f4
        • 2.Qe4#
      • 1...Kf4!
    • 1.b6?
      • 1...d5
        • 2.Qb8#
      • 1...f4
        • 2.Qe4#
      • 1...Kf4!
  • Keys
    • 1.Qg8!
      • 1...Kf4
        • 2.Qg3#
      • 1...Kd5
        • 2.Rxf5#
      • 1...f4
        • 2.Qg5#
      • 1...d5
        • 2.Qb8#

Anticipated by 151472(1860)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(E)
    • P(c);OGATEB,SBLOCK::QAB(E)
  • Tries
    • Try
      • K(B);P-FLIGHT
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • P(b);CHECK
    • Try
      • R(D);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • K(a);P_SPINP(b),S_FLIGHT::QAB1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Vars
        • P(b);N_GUARD::QAR1(E)
        • P(c);OGATEB,SBLOCK::QAB(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • P(c);
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • K(a);P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(a);OGATE,P-FLIGHT::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • P(A);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • P(A);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
    • Try
      • P(C);
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(E)
        • P(b);N_GUARD::QAR1(E)
      • Refutation
        • K(a);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(a);P_SPINP(b),S_FLIGHT::QAB1(E)
      • K(a);P-FLIGHT::R(D),XP(b)
      • P(b);OGATEB::QAR2(E)
      • P(c);OGATEB,SBLOCK::QAB(E)
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