MESON Chess Problem Database

Problem Display
PID: 17254 (4B3/3p3N/4k3/2Q5/8/6K1/8/8 w - - 0 1)

Stocchi, Ottavio

L'Avvenire d'Italia, 1926

4B3/3p3N/4k3/2Q5/8/6K1/8/8

#2

4 + 2

3100 Selected Stocchi (I) 2001
14475 Mat Plus Review 2007
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qd6+?
      • 1...Kf5
        • 2.Bg6#
        • 2.Qd5#
      • 1...Kxd6!
    • 1.Qd5+?
      • 1...Ke7
        • 2.Qxd7#
      • 1...Kxd5!
    • 1.Qg5?
      • 1...d5
        • 2.Qf6#
      • 1...d6
        • 2.Sf8#
      • 1...Kd6!
  • Keys
    • 1.Qd4!
      • 1...Kf5
        • 2.Qd5#
      • 1...Ke7
        • 2.Qxd7#
      • 1...d5
        • 2.Qf6#
      • 1...d6
        • 2.Qe4#

Anticipated by 162049(1925)

This anticipates 79260(1960), 80515(1967)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B),XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(B)
    • Try
      • Q(B);
      • Vars
        • P(b);SBLOCK::QAR1(B)
        • P(b);SBLOCK::S(C)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(a);S_FLIGHT::QAR2(B)
      • K(a);P-FLIGHT::QAR1(B),XP(b)
      • P(b);SBLOCK::QAR1(B)
      • P(b);SBLOCK::QAR2(B)
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