MESON Chess Problem Database

Problem Display
PID: 218736 (nB1N4/2r4R/1n1k4/r2b4/P2Q4/N7/8/K7 w - - 0 1)

Healey, Frank

English Mechanic and World of Science, 1874

(First published on Fri Jan 16 1874)

nB1N4/2r4R/1n1k4/r2b4/P2Q4/N7/8/K7

#2

7 + 6

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Sxb5#
    • 1...Rc5
      • 2.Qf4#
    • 1...Ra6
      • 2.Sb5#
    • 1...Ra7
      • 2.Sb5#
    • 1...Sxa4
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sd7
      • 2.Sc4#
    • 1...Sc8
      • 2.Sc4#
  • Tries
    • 1.Kb2?
      • 1...Rb5+
        • 2.Sxb5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Rxa4
        • 2.Sb5#
      • 1...Rc5
        • 2.Qf4#
      • 1...Ra6
        • 2.Sb5#
      • 1...Ra7
        • 2.Sb5#
      • 1...Sd7
        • 2.Sc4#
      • 1...Sc8
        • 2.Sc4#
      • 1...Sxa4+!
    • 1.Rf7?
      • 1...Sxa4
        • 2.Sc4#
      • 1...Rb5
        • 2.Sxb5#
      • 1...Rc5
        • 2.Qf4#
      • 1...Ra6
        • 2.Sb5#
      • 1...Ra7
        • 2.Sb5#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sd7
        • 2.Sc4#
      • 1...Sc8
        • 2.Sc4#
      • 1...Rxa4!
    • 1.Rg7?
      • 1...Sxa4
        • 2.Sc4#
      • 1...Rb5
        • 2.Sxb5#
      • 1...Rc5
        • 2.Qf4#
      • 1...Ra6
        • 2.Sb5#
      • 1...Ra7
        • 2.Sb5#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sd7
        • 2.Sc4#
      • 1...Sc8
        • 2.Sc4#
      • 1...Rxa4!
    • 1.Qb4+?
      • 1...Rc5
        • 2.Qf4#
      • 1...Ke5!
  • Keys
    • 1.Kb1!
      • 1...Rb5+
        • 2.Sxb5#
      • 1...Rxa4
        • 2.Sb5#
      • 1...Sxa4
        • 2.Sc4#
      • 1...Rc5
        • 2.Qf4#
      • 1...Ra6
        • 2.Sb5#
      • 1...Ra7
        • 2.Sb5#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sd7
        • 2.Sc4#
      • 1...Sc8
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(a);N_GUARD::S(B),XR(a)
    • R(a);SBLOCK::QAB(D)
    • R(a);N_GUARD::S(B)
    • S(c);N_GUARD,XP(C)::S(B)
    • S(c);N_GUARD::S(B),XS(c)
    • S(c);N_GUARD::S(B)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Vars
        • R(a);CHECK,N_GUARD::S(B),XR(a)
        • S(c);CHECK,N_GUARD::S(B),XS(c)
        • R(a);N_GUARD,XP(C)::S(B)
        • R(a);SBLOCK::QAB(D)
        • R(a);N_GUARD::S(B)
        • S(c);N_GUARD::S(B)
      • Refutation
        • S(c);CHECK,XP(C)
    • Try
      • R(E);
      • Vars
        • S(c);N_GUARD,XP(C)::S(B)
        • R(a);N_GUARD::S(B),XR(a)
        • R(a);SBLOCK::QAB(D)
        • R(a);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
        • S(c);N_GUARD::S(B)
      • Refutation
        • R(a);P_PINS(B),XP(C)
    • Try
      • R(E);
      • Vars
        • S(c);N_GUARD,XP(C)::S(B)
        • R(a);N_GUARD::S(B),XR(a)
        • R(a);SBLOCK::QAB(D)
        • R(a);N_GUARD::S(B)
        • S(c);N_GUARD::S(B),XS(c)
        • S(c);N_GUARD::S(B)
      • Refutation
        • R(a);P_PINS(B),XP(C)
    • Try
      • Q(D);CHECK,N_PINB(b)
      • Vars
        • R(a);N_SPINR(e),P_SPINR(a),SBLOCK::QAB(D)
      • Refutation
        • K(d);S_FLIGHT
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • R(a);CHECK,N_GUARD::S(B),XR(a)
      • R(a);N_GUARD,XP(C)::S(B)
      • S(c);N_GUARD,XP(C)::S(B)
      • R(a);SBLOCK::QAB(D)
      • R(a);N_GUARD::S(B)
      • S(c);N_GUARD::S(B),XS(c)
      • S(c);N_GUARD::S(B)
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