MESON Chess Problem Database

Problem Display
PID: 79724 (8/8/5P2/N2k4/K7/3N2R1/5R1B/6Q1 w - - 0 1)

Anonymous

L'Alfiere di Re, 1922

8/8/5P2/N2k4/K7/3N2R1/5R1B/6Q1

#2

8 + 1

133 The Problemist Supplement 2008
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qc1?
      • 1...Kd4
        • 2.Qc4#
      • 1...Ke4
        • 2.Qc4#
      • 1...Kd6
        • 2.Qc6#
      • 1...Ke6!
    • 1.Qe1?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kd6!
  • Keys
    • 1.Sc5!
      • 1...Kd4
        • 2.Rf5#
      • 1...Kxc5
        • 2.Rd2#
      • 1...Ke5
        • 2.Rd3#
      • 1...Kd6
        • 2.Rg5#

This anticipates 77081(1948), 23456(1963), 7474(1990), 35815(1991-1992), 7367(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAR2(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Vars
        • K(a);P-FLIGHT::QAB1(A)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(a);P-FLIGHT::QAB(A)+R(B)
      • K(a);P-FLIGHT,XS(D)::QAB(A)+R(B)
      • K(a);P-FLIGHT::B(C)+R(E)
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