MESON Chess Problem Database

Problem Display
PID: 11928 (8/1b3N2/4Q3/8/2Bk2n1/8/3K4/8 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1973

8/1b3N2/4Q3/8/2Bk2n1/8/3K4/8

#2

4 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bd5
      • 2.Qxd5#
    • 1...Ba6
      • 2.Qd5#
    • 1...Bc8
      • 2.Qd5#
  • Tries
    • 1.Ba2?
      • threat
        • 2.Qc4#
      • 1...Se5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Ba6
        • 2.Qd5#
      • 1...Se3
        • 2.Qxe3#
        • 2.Qe5#
      • 1...Kc5!
    • 1.Bb3?
      • threat
        • 2.Qc4#
      • 1...Se5
        • 2.Qxe5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Ba6
        • 2.Qd5#
      • 1...Se3
        • 2.Qxe3#
        • 2.Qe5#
      • 1...Kc5!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qc4#
      • 1...Kc5
        • 2.Qd6#
      • 1...Bd5
        • 2.Qb6#
      • 1...Ba6
        • 2.Qd6#
      • 1...Se3
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#

This anticipates 230780(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(c);N_GUARD::QAR1(C),XB(c)
    • B(c);N_GUARD::QAR1(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • B(c);N_GUARD::QAR1(C),XB(c)
        • B(c);N_GUARD::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • B(B);
      • Threat
        • QAR1(C)
      • Vars
        • S(b);N_GUARD::QAB1(C),XS(b)
        • B(c);N_GUARD::QAR1(C),XB(c)
        • B(c);N_GUARD::QAR1(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • B(B);
    • Threat
      • QAR1(C)
    • Vars
      • K(a);S_FLIGHT::QAB1(C)
      • B(c);SBLOCK::QAB(C)
      • B(c);N_GUARD::QAR2(C)
      • S(b);N_GUARD::QAB1(C)
      • S(b);N_GUARD::QAB1(C),XS(b)
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