MESON Chess Problem Database

Problem Display
PID: 138100 (8/8/4N3/5k2/3P1N2/5Q2/6K1/8 w - - 0 1)

Bordoni, Giovanni

Due Alfieri, 1981

8/8/4N3/5k2/3P1N2/5Q2/6K1/8

#2

5 + 1

14744 Nuova Antologia dei Problemisti Italiani 1992
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Tries
    • 1.Qd1?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kf6!
    • 1.Qd5+?
      • 1...Kg4
        • 2.Qg5#
        • 2.Qh5#
      • 1...Kf6!
    • 1.Qh5+?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kf6!
    • 1.Qa8?
      • 1...Kf6
        • 2.Qf8#
      • 1...Kg4!
    • 1.Qb3?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4
        • 2.Qh3#
      • 1...Kf6!
    • 1.Qc3?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4
        • 2.Qh3#
      • 1...Kf6!
    • 1.Qd3+?
      • 1...Kg4
        • 2.Qh3#
      • 1...Kf6!
    • 1.Qe3?
      • 1...Kg4
        • 2.Qh3#
      • 1...Kf6!
    • 1.Qg3?
      • threat
        • 2.Qg6#
      • 1...Ke4
        • 2.Qd3#
      • 1...Kf6!
    • 1.Qh3+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Kf6!
  • Keys
    • 1.Qa3!
      • 1...Ke4
        • 2.Qd3#
      • 1...Kg4
        • 2.Qh3#
      • 1...Kf6
        • 2.Qf8#

Anticipated by 206947(1859), 4506(1873), 32680(1873), 214539(1878), 24321(1885), 181144(1904), 109336(1920), 22076(1924), 206740(1925), 227725(1926), 76425(1929), 46372(1941), 18804(1958)

This anticipates 133136(1983), 184446(2000), 47757(2003), 67253(2006), 232491(2012), 235007(2019)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);P-FLIGHT::QAR2(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAB1(B)
      • K(a);P-FLIGHT::QAR2(B)
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