MESON Chess Problem Database

Problem Display
PID: 215522 (8/8/6R1/8/4pkN1/5p2/5Q2/2K5 w - - 0 1)

Riczu, Lajos

Land og Folk, 1977

8/8/6R1/8/4pkN1/5p2/5Q2/2K5

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Qe3+?
      • 1...Kf5
        • 2.Qg5#
      • 1...Kg3!
    • 1.Qg3+?
      • 1...Kf5
        • 2.Se3#
        • 2.Sh6#
      • 1...Kxg3!
    • 1.Qd4?
      • threat
        • 2.Qe5#
      • 1...Kf5
        • 2.Qf6#
      • 1...f2
        • 2.Qxf2#
      • 1...Kg3!
    • 1.Qh4?
      • threat
        • 2.Rf6#
      • 1...Kf5
        • 2.Rf6#
        • 2.Qg5#
        • 2.Qf6#
      • 1...e3!
    • 1.Qc5?
      • threat
        • 2.Qe5#
      • 1...f2
        • 2.Qxf2#
      • 1...Kg3!
    • 1.Qa2?
      • 1...Kg3
        • 2.Qh2#
      • 1...Kf5
        • 2.Qf7#
      • 1...f2
        • 2.Qxf2#
      • 1...e3!
    • 1.Qd2+?
      • 1...Kg3
        • 2.Qh2#
      • 1...Kf5
        • 2.Qg5#
      • 1...e3!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Qe5#
      • 1...Kg3
        • 2.Qh2#
      • 1...Kf5
        • 2.Qf6#
      • 1...f2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(c);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • K(c);P_SPINP(a),S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Refutation
        • K(c);S_FLIGHT,XQ(B)
    • Try
      • Q(B);N_PINP(a),P_PINP(b)
      • Threat
        • QAB1(B)
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(c);N_SPINP(b),S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • R(D)
      • Refutation
        • P(b);
    • Try
      • Q(B);N_PINP(a)
      • Threat
        • QAB1(B)
      • Vars
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);N_PINP(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • K(c);P-FLIGHT::QAR2(B)
        • P(a);OGATEB::QAR2(B),XP(a)
      • Refutation
        • P(b);
    • Try
      • Q(B);CHECK,N_PINP(a)
      • Vars
        • K(c);S_FLIGHT::QAB1(B)
        • K(c);OGATE,P-FLIGHT::QAR1(B)
      • Refutation
        • P(b);P_SPINP(b)
  • Actual
    • Q(B);N_PINP(a)
    • Threat
      • QAB1(B)
    • Vars
      • K(c);S_FLIGHT::QAB1(B)
      • K(c);P-FLIGHT::QAR1(B)
      • P(a);OGATEB::QAR2(B),XP(a)
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