MESON Chess Problem Database

Problem Display
PID: 6884 (1k2K2R/N6r/1P6/1N1Q4/3P4/6RB/8/6B1 w - - 0 1)

McQueen, Eric Duncan

Melbourne Leader, 1934

1k2K2R/N6r/1P6/1N1Q4/3P4/6RB/8/6B1

#2

10 + 2

81 Chess 1960
3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2010

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa7
      • 2.bxa7#
    • 1...Rb7
      • 2.Qd8#
    • 1...Rc7
      • 2.bxc7#
    • 1...Rd7
      • 2.Kxd7#
    • 1...Re7+
      • 2.Kxe7#
    • 1...Rf7
      • 2.Kxf7#
  • Tries
    • 1.Bg2?
      • threat
        • 2.Qa8#
        • 2.Qd8#
      • 1...Re7+
        • 2.Kxe7#
      • 1...Rxa7
        • 2.Qd8#
      • 1...Rb7
        • 2.Qxb7#
        • 2.Qd8#
      • 1...Rc7
        • 2.Qa8#
        • 2.bxc7#
      • 1...Rd7
        • 2.Kxd7#
        • 2.Qa8#
      • 1...Rxh8+!
    • 1.Rc3?
      • threat
        • 2.Rc8#
      • 1...Re7+
        • 2.Kxe7#
      • 1...Rc7
        • 2.bxc7#
      • 1...Rxh8+!
    • 1.Rgg8?
      • 1...Re7+
        • 2.Kxe7#
      • 1...Rxh3
        • 2.Kd7#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Rxa7
        • 2.bxa7#
      • 1...Rxh8
        • 2.Bh2#
      • 1...Rb7
        • 2.Qd8#
      • 1...Rh4
        • 2.Kd7#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Rh5
        • 2.Kd7#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Rh6
        • 2.Kd7#
        • 2.Ke7#
        • 2.Kf7#
      • 1...Rc7
        • 2.bxc7#
      • 1...Rd7
        • 2.Kxd7#
      • 1...Rf7
        • 2.Kxf7#
      • 1...Rg7!
    • 1.Qc6?
      • threat
        • 2.Qc8#
      • 1...Re7+
        • 2.Kxe7#
      • 1...Rc7
        • 2.bxc7#
      • 1...Rxh8+!
  • Keys
    • 1.Bh2!
      • threat
        • 2.Rg7#
      • 1...Re7+
        • 2.Kxe7#
      • 1...Rxh8+
        • 2.Rg8#
      • 1...Rxh3
        • 2.Rgxh3#
      • 1...Rxa7
        • 2.bxa7#
      • 1...Rb7
        • 2.Qd8#
      • 1...Rh4
        • 2.Rg4#
      • 1...Rh5
        • 2.Rg5#
      • 1...Rh6
        • 2.Rg6#
      • 1...Rc7
        • 2.bxc7#
      • 1...Rd7
        • 2.Kxd7#
      • 1...Rf7
        • 2.Kxf7#
      • 1...Rg7
        • 2.Rxg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XS(H)::P(G),XR(a)
    • R(a);SBLOCK::QAR2(F)
    • R(a);OGATE::P(G),XR(a)
    • R(a);::R(J)+K(I),XR(a)
    • R(a);CHECK::R(J)+K(I),XR(a)
  • Tries
    • Try
      • B(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK::R(J)+K(I),XR(a)
        • R(a);XS(H)::QAR2(F)
      • Refutation
        • R(a);CHECK,XR(J)
    • Try
      • R(B);
      • Threat
        • R1(B)
      • Vars
        • R(a);CHECK::R(J)+K(I),XR(a)
        • R(a);OGATE::P(G),XR(a)
      • Refutation
        • R(a);CHECK,XR(J)
    • Try
      • R(B);
      • Vars
        • R(a);CHECK::R(B)+K(I),XR(a)
        • R(a);OGATE,XS(H)::P(G),XR(a)
        • R(a);N_GUARD,P_PINR(B),XR(J)::B(A)
        • R(a);SBLOCK::QAR2(F)
        • R(a);OGATE::P(G),XR(a)
        • R(a);::R(B)+K(I),XR(a)
      • Refutation
        • R(a);
    • Try
      • Q(F);
      • Threat
        • QAR1(F)
      • Vars
        • R(a);CHECK::R(J)+K(I),XR(a)
        • R(a);OGATE::P(G),XR(a)
      • Refutation
        • R(a);CHECK,XR(J)
  • Actual
    • B(A);
    • Threat
      • B(A)+R(B)
    • Vars
      • R(a);CHECK::R(J)+K(I),XR(a)
      • R(a);CHECK,N_GUARD,XR(J)::B(A)+R(B)
      • R(a);OGATE,XB(C)::B(A)+R(B),XR(a)
      • R(a);OGATE,XS(H)::P(G),XR(a)
      • R(a);SBLOCK::QAR2(F)
      • R(a);N_GUARD::B(A)+R(B)
      • R(a);OGATE::P(G),XR(a)
      • R(a);::R(J)+K(I),XR(a)
      • R(a);::B(A)+R(B),XR(a)
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