MESON Chess Problem Database

Problem Display
PID: 55111 (5N1k/2B4N/1p2B1Pp/1Q2K3/2pppp2/8/8/r7 w - - 0 1)

Ugren, Ljubomir

3rd Prize, Problem TT, 1971

5N1k/2B4N/1p2B1Pp/1Q2K3/2pppp2/8/8/r7

#2

7 + 8

56 The Problemist 2004

SOLUTION

  • SOUND
  • Tries
    • 1.Kxd4?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Kg7
        • 2.Be5#
        • 2.Qe5#
      • 1...Ra5
        • 2.Be5#
      • 1...Ra7
        • 2.Qe5#
      • 1...Rd1+!
    • 1.Kxe4?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Kg7
        • 2.Be5#
        • 2.Qe5#
      • 1...Ra5
        • 2.Be5#
      • 1...Ra7
        • 2.Qe5#
      • 1...Re1+!
    • 1.Kxf4?
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Kg7
        • 2.Be5#
        • 2.Qe5#
      • 1...Ra5
        • 2.Be5#
      • 1...Ra7
        • 2.Qe5#
      • 1...Rf1+!
    • 1.Kd5?
      • threat
        • 2.Be5#
      • 1...Kg7
        • 2.Be5#
      • 1...Ra7!
    • 1.Kd6?
      • threat
        • 2.Qe5#
      • 1...Kg7
        • 2.Qe5#
      • 1...Ra5!
    • 1.Bd8?
      • threat
        • 2.Bf6#
      • 1...Kg7
        • 2.Bf6#
      • 1...Ra7!
  • Keys
    • 1.Kf5!
      • threat
        • 2.Be5#
        • 2.Qe5#
      • 1...Kg7
        • 2.Be5#
        • 2.Qe5#
      • 1...Ra5
        • 2.Be5#
      • 1...Ra7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(B);S_FLIGHT,XP(c)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::B(E)
        • R(a);::QAB(A)
      • Refutation
        • R(a);CHECK
    • Try
      • K(B);P-FLIGHT,XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::B(E)
        • R(a);::QAB(A)
      • Refutation
        • R(a);CHECK
    • Try
      • K(B);S_FLIGHT,XP(e)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);::B(E)
        • R(a);::QAB(A)
      • Refutation
        • R(a);CHECK
    • Try
      • K(B);P-FLIGHT
      • Threat
        • B(E)
      • Vars
        • K(h);S_FLIGHT::B(E)
      • Refutation
        • R(a);
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB(A)
      • Vars
        • K(h);S_FLIGHT::QAB(A)
      • Refutation
        • R(a);
    • Try
      • B(E);
      • Threat
        • B(E)
      • Vars
        • K(h);S_FLIGHT::B(E)
      • Refutation
        • R(a);
  • Actual
    • K(B);P-FLIGHT
    • Threat
      • DUALS(2)
    • Vars
      • R(a);P_PINQ(A)::B(E)
      • R(a);::QAB(A)
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