MESON Chess Problem Database

Problem Display
PID: 197419 (1b2N3/1pp3B1/1P4Q1/1pk5/5N2/P7/4B2K/8 w - - 0 1)

Birzoi, C

diagrammes, 1974

1b2N3/1pp3B1/1P4Q1/1pk5/5N2/P7/4B2K/8

#2

8 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...cxb6
      • 2.Qc2#
    • 1...c6
      • 2.Qg1#
  • Tries
    • 1.Sd3+?
      • 1...Kc4
        • 2.Qf7#
        • 2.Qe6#
      • 1...Kd5!
    • 1.Qd3?
      • threat
        • 2.Qxb5#
      • 1...Kc6
        • 2.Qxb5#
      • 1...b4
        • 2.Qb5#
      • 1...c6
        • 2.Bd4#
        • 2.Qe3#
        • 2.Qd4#
      • 1...Kxb6!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Qxb5#
      • 1...Kxb6!
    • 1.Qh5+?
      • 1...Kc6
        • 2.Qxb5#
      • 1...Kxb6!
    • 1.Qg5+?
      • 1...Kc6
        • 2.Qxb5#
      • 1...Kxb6!
    • 1.Qe6?
      • threat
        • 2.Sd3#
      • 1...cxb6
        • 2.Qd5#
      • 1...c6
        • 2.Qe3#
      • 1...b4!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Bf8#
      • 1...cxb6
        • 2.Qc3#
      • 1...c6
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • P(d);P_PINS(D),SBLOCK,XP(E)::QAR(F)
    • P(d);P_PINS(D),SBLOCK::QAB(F)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(F);
      • Threat
        • QAR1(F),XP(a)
      • Vars
        • K(b);P-FLIGHT::QAB1(F),XP(a)
        • P(a);::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(F),XP(a)
      • Refutation
        • K(b);S_FLIGHT,XP(E)
    • Try
      • Q(F);
      • Threat
        • S(D)
      • Vars
        • P(d);P_PINS(D),SBLOCK,XP(E)::QAR1(F)
        • P(d);P_PINS(D),SBLOCK::QAB(F)
      • Refutation
        • P(a);
  • Actual
    • Q(F);
    • Threat
      • B(G)
    • Vars
      • P(d);P_PINS(D),SBLOCK,XP(E)::QAR2(F)
      • P(d);P_PINS(D),SBLOCK::QAB1(F)
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