MESON Chess Problem Database

Problem Display
PID: 51056 (Q7/8/5P2/3Ppk1K/7p/6br/2R2PPp/1B5n w - - 0 1)

Crake, James

Burnley Express, 1880

Q7/8/5P2/3Ppk1K/7p/6br/2R2PPp/1B5n

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rc4#
    • 1...Kxf6
      • 2.Qf8#
    • 1...Bxf2
      • 2.Rxf2#
    • 1...Sxf2
      • 2.Rxf2#
  • Tries
    • 1.Rc3+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Kxf6
        • 2.Qf8#
      • 1...e4!
    • 1.Rc4+?
      • 1...Kxf6
        • 2.Qf8#
      • 1...e4!
    • 1.Qc8+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kxf6
        • 2.Qf8#
      • 1...Ke4!
  • Keys
    • 1.Qg8!
      • 1...Ke4
        • 2.Rc4#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kxf6
        • 2.Qf8#
      • 1...Bxf2
        • 2.Rxf2#
      • 1...Sxf2
        • 2.Rxf2#
      • 1...e4
        • 2.Qg5#
      • 1...Bf4
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(g);S_FLIGHT::B(A)+R(B),DCHECK
    • K(g);OGATEB,P-FLIGHT,XP(G)::QAR2(H)
    • B(c);OGATE,XP(C)::B(A)+R(B),DCHECK,XB(c)
    • S(a);OGATE,XP(C)::B(A)+R(B),DCHECK,XS(a)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • K(g);P-FLIGHT::R1(B)
        • K(g);P-FLIGHT,XP(G)::QAR2(H)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • R(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XP(G)::QAR2(H)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(H);CHECK
      • Vars
        • K(g);OGATE,P-FLIGHT::QAR1(H)
        • K(g);OGATEB,P-FLIGHT,XP(G)::QAR2(H)
      • Refutation
        • K(g);S_FLIGHT
  • Actual
    • Q(H);
    • Vars
      • K(g);S_FLIGHT::B(A)+R(B),DCHECK
      • K(g);P-FLIGHT::QAR1(H)
      • K(g);OGATEB,P-FLIGHT,XP(G)::QAR2(H)
      • B(c);OGATE,XP(C)::B(A)+R(B),DCHECK,XB(c)
      • S(a);OGATE,XP(C)::B(A)+R(B),DCHECK,XS(a)
      • P(f);SBLOCK::QAR1(H)
      • B(c);SBLOCK::QAB1(H)
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