MESON Chess Problem Database

Problem Display
PID: 57329 (3R3q/3N4/1B6/3kPP2/r6p/4bp1K/1R2B3/Q7 w - - 0 1)

Loedel, Juan Eduardo

2nd HM., Brisbane Courier, 1919

3R3q/3N4/1B6/3kPP2/r6p/4bp1K/1R2B3/Q7

#2

9 + 6

14868 Pirnie Collection 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qa8#
    • 1...Rd4
      • 2.Qa8#
    • 1...Re4
      • 2.Qa8#
    • 1...Rf4
      • 2.Qa8#
    • 1...Rg4
      • 2.Qa8#
    • 1...Ra8
      • 2.Qxa8#
  • Tries
    • 1.Qxa4?
      • threat
        • 2.Bxf3#
        • 2.Qc4#
        • 2.Qa8#
      • 1...Qxe5
        • 2.Sf6#
      • 1...Qxd8
        • 2.Bxf3#
        • 2.Qc4#
      • 1...Bxb6
        • 2.Bxf3#
        • 2.Qc4#
      • 1...Bd4
        • 2.Bxf3#
        • 2.Qa8#
      • 1...Qf6
        • 2.Bxf3#
        • 2.Qc4#
      • 1...Qh5
        • 2.Qc4#
        • 2.Qa8#
      • 1...Qh6
        • 2.Bxf3#
        • 2.Qc4#
      • 1...Bc5
        • 2.Bxf3#
      • 1...f2
        • 2.Bf3#
        • 2.Qc4#
        • 2.Qa8#
      • 1...fxe2!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Bxf3#
      • 1...Kc6
        • 2.Bxf3#
      • 1...Qxe5
        • 2.Sxe5#
      • 1...Rxb4
        • 2.Qa8#
      • 1...fxe2
        • 2.Qh1#
      • 1...Qh5
        • 2.Sb8#
      • 1...f2
        • 2.Bf3#
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(c);OGATE::QAB(A)
    • R(c);OGATE,SBLOCK::QAB(A)
    • R(c);OGATE::QAB(A),XR(c)
  • Tries
    • Try
      • Q(A);XR(c)
      • Threat
        • DUALS(3)
      • Vars
        • Q(f);SBLOCK,XP(E)::R(I)+S(H),DCHECK
        • B(a);::B(C),XP(b)
      • Refutation
        • P(b);XB(C)
  • Actual
    • R(B);
    • Threat
      • B(C),XP(b)
    • Vars
      • K(e);S_FLIGHT::B(C),XP(b)
      • Q(f);XP(E)::R(I)+S(H),XQ(f)
      • R(c);OGATE,XR(B)::QAB(A)
      • P(b);OGATEB,XB(C)::QAB(A)
      • Q(f);N_GUARD::R(I)+S(H)
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