MESON Chess Problem Database

Problem Display
PID: 143455 (6RK/8/5NPP/3Ppk2/4R2B/2q5/3n2B1/1Q6 w - - 0 1)

Anonymous

Hackney Mercury, 1894

6RK/8/5NPP/3Ppk2/4R2B/2q5/3n2B1/1Q6

#2

10 + 4

15 British Chess Magazine 1894

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Bh3#
    • 1...Qb2
      • 2.Bh3#
    • 1...Qb4
      • 2.Bh3#
    • 1...Qd4
      • 2.Bh3#
    • 1...Qa5
      • 2.Bh3#
    • 1...Qc1
      • 2.Bh3#
    • 1...Qc2
      • 2.Bh3#
    • 1...Qh3
      • 2.Bxh3#
    • 1...Qc4
      • 2.Bh3#
    • 1...Qc5
      • 2.Bh3#
    • 1...Qc6
      • 2.Bh3#
    • 1...Qc7
      • 2.Bh3#
    • 1...Qc8
      • 2.Bh3#
    • 1...Sf3
      • 2.Bh3#
    • 1...Sxe4
      • 2.Qxe4#
  • Tries
    • 1.Rxe5+?
      • 1...Kf4
        • 2.Qf5#
      • 1...Kxe5!
    • 1.Qd3?
      • threat
        • 2.Bh3#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Qxd3!
    • 1.Qf1+?
      • 1...Qf3
        • 2.Bh3#
      • 1...Sf3
        • 2.Bh3#
      • 1...Sxf1!
    • 1.Qb5?
      • threat
        • 2.Qd7#
      • 1...Qc6
        • 2.Bh3#
      • 1...Qc7
        • 2.Bh3#
      • 1...Qc8
        • 2.Bh3#
      • 1...Sxe4!
    • 1.Qb6?
      • threat
        • 2.Qe6#
      • 1...Qc6
        • 2.Bh3#
      • 1...Qc8
        • 2.Bh3#
      • 1...Sxe4!
    • 1.Qb7?
      • threat
        • 2.Qd7#
      • 1...Qc6
        • 2.Bh3#
      • 1...Qc7
        • 2.Bh3#
      • 1...Qc8
        • 2.Bh3#
        • 2.Qxc8#
      • 1...Sxe4!
  • Keys
    • 1.Qc1!
      • 1...Qxc1
        • 2.Bh3#
      • 1...Sxe4
        • 2.Bxe4#
      • 1...Qc2
        • 2.Bh3#
      • 1...Qa1
        • 2.Bh3#
        • 2.Qc8#
      • 1...Qb2
        • 2.Bh3#
        • 2.Qc8#
      • 1...Qb4
        • 2.Bh3#
        • 2.Qc8#
      • 1...Qd4
        • 2.Bh3#
        • 2.Qc8#
      • 1...Qa5
        • 2.Bh3#
        • 2.Qc8#
      • 1...Qa3
        • 2.Qc8#
      • 1...Qb3
        • 2.Qc8#
      • 1...Qd3
        • 2.Qc8#
      • 1...Qe3
        • 2.Qc8#
      • 1...Qf3
        • 2.Qc8#
      • 1...Qg3
        • 2.Qc8#
      • 1...Qh3
        • 2.Bxh3#
        • 2.Qc8#
      • 1...Qc4
        • 2.Bh3#
      • 1...Qc5
        • 2.Bh3#
      • 1...Qc6
        • 2.Bh3#
      • 1...Qc7
        • 2.Bh3#
      • 1...Qc8
        • 2.Bh3#
        • 2.Qxc8#
      • 1...Sb1
        • 2.Qg5#
      • 1...Sf1
        • 2.Qg5#
      • 1...Sb3
        • 2.Qg5#
      • 1...Sf3
        • 2.Bh3#
      • 1...Sc4
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 7
  • Sets
    • Q(b);N_GUARD::B(B)
    • Q(b);N_GUARD::B(B),XQ(b)
    • Q(b);N_GUARD,P_PINR(I)::B(B)
    • S(a);S_CUTQ(b)::B(B)
    • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(A),XS(a)
  • Tries
    • Try
      • R(C);CHECK,XP(c)
      • Vars
        • K(d);P-FLIGHT::QAR1(A)
      • Refutation
        • K(d);P-FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • B(B)
      • Vars
        • S(a);OGATE,P_SPINS(a),XR(C)::QAB1(A),XS(a)
      • Refutation
        • Q(b);XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::B(B)
        • S(a);P_SPINS(a)::B(B)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(b);N_GUARD::B(B)
        • Q(b);N_GUARD,P_PINR(I)::B(B)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • Q(b);N_GUARD::B(B)
        • Q(b);N_GUARD,P_PINR(I)::B(B)
      • Refutation
        • S(a);XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • Q(b);N_GUARD::B(B)
      • Refutation
        • S(a);XR(C)
  • Actual
    • Q(A);
    • Vars
      • Q(b);N_GUARD,XQ(A)::B(B)
      • S(a);OGATE,XR(C)::B(B),XS(a)
      • Q(b);N_GUARD::B(B)
      • Q(b);OGATE::QAB(A)
      • S(a);OGATE::QAR1(A)
      • S(a);S_CUTQ(b)::B(B)
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