MESON Chess Problem Database

Problem Display
PID: 228910 (1N4Bb/KQ1p1r2/4kBp1/8/3Pp1P1/8/8/7b w - - 0 1)

Cristoffanini, Guido

L'Echiquier, 1926

1N4Bb/KQ1p1r2/4kBp1/8/3Pp1P1/8/8/7b

#2

7 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bxf6
      • 2.Qxd7#
    • 1...d5
      • 2.Qe7#
    • 1...d6
      • 2.Qxf7#
  • Tries
    • 1.Qxe4+?
      • 1...Kd6
        • 2.Qe5#
      • 1...Kxf6
        • 2.Qe5#
      • 1...Bxe4!
    • 1.Qd5+?
      • 1...Kxf6
        • 2.Qe5#
      • 1...Kxd5!
    • 1.Qa6+?
      • 1...Kd5
        • 2.Bxf7#
      • 1...d6+!
    • 1.Qb6+?
      • 1...Kd5
        • 2.Bxf7#
      • 1...d6+!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Kd5
        • 2.Bxf7#
      • 1...Kxf6
        • 2.Qe5#
      • 1...Bxf6
        • 2.Qxd7#
      • 1...d5
        • 2.Qe7#
      • 1...d6
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK,XB(C)::QAB1(E),XP(e)
    • P(e);OGATE,P_PINQ(E),SBLOCK::QAR1(E)
    • P(e);OGATE,P_PINQ(E),SBLOCK::QAB1(E),XR(f)
  • Tries
    • Try
      • Q(E);CHECK,XP(b)
      • Vars
        • K(c);N_SPINR(f),P-FLIGHT::QAB1(E)
        • K(c);N_SPINR(f),P-FLIGHT,XB(C)::QAB1(E)
      • Refutation
        • B(a);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);N_SPINR(f),P-FLIGHT,XB(C)::QAB1(E)
      • Refutation
        • K(c);S_FLIGHT,XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::B(G),XR(f)
      • Refutation
        • P(e);CHECK,P_SPINP(e)
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);S_FLIGHT::B(G),XR(f)
      • Refutation
        • P(e);CHECK,P_SPINP(e)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • K(c);S_FLIGHT::B(G),XR(f)
      • K(c);N_SPINR(f),P-FLIGHT,XB(C)::QAB1(E)
      • B(g);SBLOCK,XB(C)::QAB1(E),XP(e)
      • P(e);OGATE,P_PINQ(E),SBLOCK::QAR1(E)
      • P(e);OGATE,P_PINQ(E),SBLOCK::QAB1(E),XR(f)
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Developed and maintained by Brian Stephenson.
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