MESON Chess Problem Database

Problem Display
PID: 22731 (KQ6/8/8/8/6P1/6R1/7k/R4b2 w - - 0 1)

Haring, Jacobus

Sozavox, 1987

KQ6/8/8/8/6P1/6R1/7k/R4b2

#2

5 + 2

2786 More Fun with Chess Miniatures 2000
5454 Near Snap 2007
145 StrateGems 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Kh1
      • 2.Qh8#
    • 1...Bg2+
      • 2.Rf3#
    • 1...Bh3
      • 2.Rgg1#
  • Tries
    • 1.Rg1+?
      • 1...Kh3
        • 2.Qg3#
        • 2.Qh8#
      • 1...Kxg1!
    • 1.Rg2+?
      • 1...Kh1
        • 2.Qh2#
      • 1...Kh3
        • 2.Qh2#
        • 2.Qg3#
      • 1...Kxg2!
    • 1.Rh3+?
      • 1...Kg1
        • 2.Qh2#
        • 2.Qg3#
      • 1...Kg2
        • 2.Qh2#
        • 2.Qg3#
      • 1...Kxh3!
    • 1.Qh8+?
      • 1...Bh3
        • 2.Qxh3#
      • 1...Kxg3!
  • Keys
    • 1.Qf4!
      • 1...Bg2+
        • 2.Rf3#
      • 1...Kh1
        • 2.Qh6#
      • 1...Be2
        • 2.Qf2#
      • 1...Bd3
        • 2.Qf2#
      • 1...Bh3
        • 2.Rgg1#
      • 1...Bc4
        • 2.Qf2#
      • 1...Bb5
        • 2.Qf2#
      • 1...Ba6
        • 2.Qf2#

Anticipated by 28737(1935), 134461(1983)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT,P_SPINB(a)::QAB(E)
    • B(a);CHECK,SBLOCK::QAB(E)+R(B)
    • B(a);SBLOCK::QAB(E)+R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • K(b);P_SPINB(a),S_FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINB(a)::QAR1(E)
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • R(B);CHECK
      • Refutation
        • K(b);P-FLIGHT,XR(B)
    • Try
      • Q(E);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(E),XB(a)
      • Refutation
        • K(b);S_FLIGHT,XR(B)
  • Actual
    • Q(E);
    • Vars
      • B(a);CHECK,SBLOCK::QAB(E)+R(B)
      • K(b);P-FLIGHT,P_SPINB(a)::QAR(E)
      • B(a);N_GUARD::QAR2(E)
      • B(a);SBLOCK::QAB(E)+R(B)
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