MESON Chess Problem Database

Problem Display
PID: 240461 (k7/P7/8/Q1b5/6R1/8/6K1/8 w - - 0 1)

Parkhomenko, Nikolai A

Problemas, 1995

k7/P7/8/Q1b5/6R1/8/6K1/8

#2

4 + 2

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kb7
      • 2.a8Q#
  • Tries
    • 1.Rg7?
      • threat
        • 2.Qd8#
      • 1...Bxa7
        • 2.Qxa7#
      • 1...Bb6
        • 2.Qd5#
      • 1...Bd6
        • 2.Qd5#
      • 1...Be7!
    • 1.Rg8+?
      • 1...Kb7
        • 2.a8Q#
        • 2.a8B#
      • 1...Bf8!
    • 1.Qd8+?
      • 1...Kb7
        • 2.a8Q#
      • 1...Kxa7!
  • Keys
    • 1.Ra4!
      • 1...Kb7
        • 2.a8Q#
      • 1...Bxa7
        • 2.Qxa7#
      • 1...Bg1
        • 2.Qd5#
      • 1...Bf2
        • 2.Qd5#
      • 1...Ba3
        • 2.Qd5#
      • 1...Be3
        • 2.Qd5#
      • 1...Bb4
        • 2.Qd5#
      • 1...Bd4
        • 2.Qd5#
      • 1...Bb6
        • 2.Qd5#
      • 1...Bd6
        • 2.Qd5#
      • 1...Be7
        • 2.Qd5#
      • 1...Bf8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATE,S_FLIGHT::P=Q
  • Tries
    • Try
      • R(B);
      • Threat
        • QAR(C)
      • Vars
        • B(a);OGATE,P_SPINB(a),XP(D)::QAR1(C),XB(a)
        • B(a);OGATE::QAB(C)
      • Refutation
        • B(a);
    • Try
      • R(B);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::P=Q
      • Refutation
        • K(b);P-FLIGHT,XP(D)
  • Actual
    • R(B);
    • Vars
      • K(b);OGATE,S_FLIGHT::P=Q
      • B(a);OGATE,P_SPINB(a),XP(D)::QAR1(C),XB(a)
      • B(a);OGATE::QAB(C)
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