MESON Chess Problem Database

Problem Display
PID: 153823 (N5bQ/1rR3K1/2p1pP2/2Bk4/1ppP3R/4p3/4P2b/1N1B4 w - - 0 1)

Collins, Francis Charles

Cheltenham Examiner, 1891

(First published on Wed Jan 28 1891)

N5bQ/1rR3K1/2p1pP2/2Bk4/1ppP3R/4p3/4P2b/1N1B4

#2

11 + 9

15239 Valois Notebooks 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rb6
      • 2.Sxb6#
    • 1...Ra7
      • 2.Sb6#
    • 1...b3
      • 2.Sc3#
    • 1...c3
      • 2.Bb3#
    • 1...e5
      • 2.Qxg8#
  • Tries
    • 1.Rxb7?
      • threat
        • 2.Sb6#
      • 1...e5
        • 2.Sc7#
        • 2.Qxg8#
      • 1...Bc7
        • 2.Sxc7#
      • 1...Bf4!
    • 1.Qh5+?
      • 1...Be5
        • 2.Qf3#
        • 2.Qxe5#
      • 1...e5!
  • Keys
    • 1.Rf4!
      • 1...Rxc7+
        • 2.Sxc7#
      • 1...Bxf4
        • 2.Qh1#
      • 1...c3
        • 2.Bb3#
      • 1...e5
        • 2.Qxg8#
      • 1...Rb5
        • 2.Rd7#
      • 1...Rb6
        • 2.Sxb6#
        • 2.Rd7#
      • 1...Ra7
        • 2.Sb6#
      • 1...Rb8
        • 2.Rd7#
      • 1...Bg1
        • 2.Qh1#
      • 1...Bg3
        • 2.Qh1#
      • 1...Bf7
        • 2.Qd8#
      • 1...Bh7
        • 2.Qd8#
      • 1...b3
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 1
  • Sets
    • R(h);N_GUARD,N_PINR(H)::S(J),XR(h)
    • R(h);N_GUARD::S(J)
    • P(c);N_GUARD::S(A)
    • P(d);OGATEB::B(B)
    • P(g);OGATEB::QAB(K),XB(i)
  • Tries
    • Try
      • R(H);N_SPINR(H),XR(h)
      • Threat
        • S(J)
      • Vars
        • B(a);N_GUARD::S(J),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(K);CHECK
      • Refutation
        • P(g);P_SPINP(g)
  • Actual
    • R(E);
    • Vars
      • R(h);CHECK,XR(H)::S(J),XR(h)
      • B(a);OGATE,XR(E)::QAB(K)
      • P(d);OGATEB::B(B)
      • P(g);OGATEB::QAB(K),XB(i)
      • R(h);N_GUARD,N_PINR(H)::R(H)
      • R(h);N_GUARD::S(J)
      • B(a);OGATE::QAB(K)
      • B(i);N_PINR(H),OGATE::QAR(K)
      • B(i);OGATE::QAR(K)
      • P(c);N_GUARD::S(A)
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