MESON Chess Problem Database

Problem Display
PID: 180937 (b7/r1pQ4/P2RP3/2k2P2/KN3P2/Bn2n3/P1P1B3/1r6 w - - 0 1)

Billington, Thomas Henry

London Opinion, 1905

(First published on Sat Jan 14 1905)

b7/r1pQ4/P2RP3/2k2P2/KN3P2/Bn2n3/P1P1B3/1r6

#2

12 + 7

15 British Chess Magazine 1911

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa6+
      • 2.Sxa6#
    • 1...Rb7
      • 2.Rc6#
      • 2.Qc6#
    • 1...Bc6+
      • 2.Rxc6#
      • 2.Qxc6#
    • 1...Sxc2
      • 2.Sxc2#
    • 1...Sc4
      • 2.Sd3#
    • 1...cxd6
      • 2.Qxa7#
  • Tries
    • 1.Qxc7+?
      • 1...Bc6+
        • 2.Sxc6#
        • 2.Qxc6#
      • 1...Rxc7!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Sd5#
      • 1...Rxa6+
        • 2.Sxa6#
      • 1...Bc6+
        • 2.Rxc6#
      • 1...Kxd6
        • 2.Qf8#
      • 1...Sxc2
        • 2.Sxc2#
      • 1...cxd6
        • 2.Qxa7#
      • 1...Rb7
        • 2.Rc6#
      • 1...Bd5
        • 2.Sxd5#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sd5
        • 2.Sxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • R(e);CHECK,XP(I)::B(D)+S(F),DCHECK,XR(e)
    • S(c);XP(B)::B(D)+S(F),XS(c)
    • S(c);SBLOCK::B(D)+S(F),DCHECK
    • P(f);OGATE,SBLOCK,XR(J)::QAB(L),XR(e)
  • Tries
    • Try
      • Q(L);CHECK,XP(f)
      • Refutation
        • R(e);N_PINP(I),XQ(L)
  • Actual
    • Q(L);
    • Threat
      • B(D)+S(F)
    • Vars
      • R(e);CHECK,XP(I)::B(D)+S(F),DCHECK,XR(e)
      • B(g);CHECK,N_GUARD::R1(J),XB(g)
      • K(d);OGATEB,S_FLIGHT,XR(J)::QAB(L)
      • S(c);XP(B)::B(D)+S(F),XS(c)
      • P(f);OGATE,SBLOCK,XR(J)::QAB(L),XR(e)
      • R(e);N_PINP(I),S_CUTB(g)::R1(J)
      • B(g);::B(D)+S(F),XB(g)
      • S(b);N_GUARD::QAB1(L)
      • S(b);N_GUARD::QAB1(L),XS(b)
      • S(b);N_GUARD,N_PINP(I)::QAB1(L)
      • S(c);SBLOCK::B(D)+S(F),DCHECK
      • S(c);::B(D)+S(F),XS(c)
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