MESON Chess Problem Database

Problem Display
PID: 53876 (k4B2/8/K7/8/8/8/5p2/Q4r2 w - - 0 1)

Tryssesoone, Louis

Het Belgisch Schaakbord (L'Echiquier Belge), 1951

k4B2/8/K7/8/8/8/5p2/Q4r2

#2

3 + 3

5454 Near Snap 2014

SOLUTION

  • SOUND
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qa7#
        • 2.Qd8#
      • 1...Kb8
        • 2.Qd8#
      • 1...Rb1
        • 2.Qa7#
      • 1...Rc1
        • 2.Qa7#
      • 1...Rd1
        • 2.Qa7#
      • 1...Ra1+!
    • 1.Qg7?
      • threat
        • 2.Qa7#
        • 2.Qb7#
      • 1...Kb8
        • 2.Qb7#
      • 1...Rb1
        • 2.Qa7#
      • 1...Ra1+!
    • 1.Qd1?
      • threat
        • 2.Qd8#
      • 1...Kb8
        • 2.Qd8#
      • 1...Rxd1!
  • Keys
    • 1.Qh8!
      • threat
        • 2.Ba3#
        • 2.Bb4#
        • 2.Bc5#
        • 2.Bd6#
        • 2.Bh6#
        • 2.Be7#
        • 2.Bg7#
      • 1...Ra1+
        • 2.Ba3#
      • 1...Kb8
        • 2.Bd6#
      • 1...Rb1
        • 2.Bb4#
      • 1...Rc1
        • 2.Bc5#
      • 1...Rd1
        • 2.Bd6#
      • 1...Re1
        • 2.Be7#
      • 1...Rg1
        • 2.Bg7#
      • 1...Rh1
        • 2.Bh6#

Anticipated by 202243(1923)

This anticipates 137631(1969), 48044(1974), 149247(1995)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
        • R(a);::QAR1(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
        • R(a);::QAR1(A)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);
      • Threat
        • QAR(A)
      • Vars
        • K(c);P-FLIGHT::QAR2(A)
      • Refutation
        • R(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • DUALS(7)
    • Vars
      • R(a);CHECK::QAR(A)+B(C)
      • K(c);P-FLIGHT::QAR(A)+B(C),DCHECK
      • R(a);::QAR(A)+B(C)
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