MESON Chess Problem Database

Problem Display
PID: 153078 (k2K4/P7/1P6/3p4/8/5R2/8/1Q5b w - - 0 1)

Aliovsadzade, Rauf Gadzhiaga ogli

Problem Online, 2008

k2K4/P7/1P6/3p4/8/5R2/8/1Q5b

#2

5 + 3

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Qf5?
      • threat
        • 2.Qc8#
        • 2.Qxd5#
      • 1...Bxf3
        • 2.Qc8#
      • 1...d4
        • 2.Qe4#
        • 2.Qc8#
        • 2.Qd5#
      • 1...Kb7!
    • 1.Qxh1?
      • 1...d4
        • 2.Rf1#
        • 2.Rf2#
        • 2.Ra3#
        • 2.Rb3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Re3#
        • 2.Rg3#
        • 2.Rh3#
        • 2.Rf4#
        • 2.Rf5#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kb7!
    • 1.Qb5?
      • threat
        • 2.Qc6#
        • 2.Qxd5#
      • 1...Bxf3
        • 2.Qc6#
      • 1...d4
        • 2.Qc6#
        • 2.Qd5#
      • 1...Kb7!
  • Keys
    • 1.Ra3!
      • threat
        • 2.b7#
      • 1...Kb7
        • 2.a8Q#
      • 1...d4
        • 2.Qxh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • P(b);OGATEB::QAB(A)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XR(B)::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);XB(a)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);XR(B)::QAB(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • P(C)
    • Vars
      • K(c);OGATE,S_FLIGHT::P=Q
      • P(b);OGATEB::QAB(A),XB(a)
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