MESON Chess Problem Database

Problem Display
PID: 7474 (1B6/Q1R5/1R6/8/2N1k2P/P7/4P3/4K3 w - - 0 1)

di Vincenzi, Renato

Unpublished, 1990

1B6/Q1R5/1R6/8/2N1k2P/P7/4P3/4K3

#2

9 + 1

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Qa5?
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kf4!
    • 1.Qb7+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf3#
      • 1...Kd4!
    • 1.Qa8+?
      • 1...Kf4
        • 2.Qf3#
      • 1...Kf5
        • 2.Qf3#
      • 1...Kd4!
  • Keys
    • 1.Se3!
      • 1...Kxe3
        • 2.Rb4#
      • 1...Kd4
        • 2.Re6#
      • 1...Kf4
        • 2.Re7#
      • 1...Ke5
        • 2.Rc4#

Anticipated by 79724(1922), 77081(1948), 23456(1963), 216138(1980)

This anticipates 35815(1991-1992), 108119(1998), 7367(1999), 96631(2005)

FEATURES

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