MESON Chess Problem Database

Problem Display
PID: 150275 (7B/4p1r1/1N2R1n1/1pk5/pp3p2/7n/2p1N2p/4Q2K w - - 0 1)

Williams, Philip Hamilton

Hampstead and Highgate Express, 1895

(First published on Sat Oct 19 1895)

7B/4p1r1/1N2R1n1/1pk5/pp3p2/7n/2p1N2p/4Q2K

#2

6 + 11

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Rf7
      • 2.Bd4#
    • 1...Rh7
      • 2.Bd4#
    • 1...Rg8
      • 2.Bd4#
    • 1...Sg1
      • 2.Qf2#
    • 1...Sf2+
      • 2.Qxf2#
    • 1...Sg5
      • 2.Qf2#
    • 1...c1Q
      • 2.Qxc1#
    • 1...c1S
      • 2.Qxc1#
    • 1...c1B
      • 2.Qxc1#
    • 1...c1R
      • 2.Qxc1#
    • 1...b3
      • 2.Qc3#
  • Tries
    • 1.Bxg7?
      • threat
        • 2.Bd4#
      • 1...Sf2+
        • 2.Qxf2#
      • 1...Se5!
    • 1.Qd2?
      • threat
        • 2.Qxc2#
        • 2.Qd4#
        • 2.Qd5#
      • 1...c1Q+
        • 2.Qxc1#
      • 1...c1R+
        • 2.Qxc1#
      • 1...c1S
        • 2.Qxc1#
        • 2.Qc2#
        • 2.Qd4#
        • 2.Qd5#
      • 1...c1B
        • 2.Qxc1#
        • 2.Qc2#
        • 2.Qd4#
        • 2.Qd5#
      • 1...Se5
        • 2.Qd4#
        • 2.Qd5#
      • 1...b3
        • 2.Qc3#
        • 2.Qd4#
      • 1...Sf2+!
    • 1.Qa1?
      • threat
        • 2.Qd4#
      • 1...c1Q+
        • 2.Qxc1#
      • 1...c1R+
        • 2.Qxc1#
      • 1...Sf2+!
  • Keys
    • 1.Sc1!
      • 1...Sf2+
        • 2.Qxf2#
      • 1...Kd4
        • 2.Qxb4#
      • 1...Sxh8
        • 2.Qe5#
      • 1...Rf7
        • 2.Sd3#
      • 1...Rh7
        • 2.Sd3#
      • 1...Rg8
        • 2.Sd3#
      • 1...Sg1
        • 2.Qf2#
      • 1...Sg5
        • 2.Qf2#
      • 1...Sh4
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qe5#
      • 1...a3
        • 2.Sb3#
      • 1...b3
        • 2.Qc3#
      • 1...f3
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • R(k);OGATE::B(F)
    • S(c);N_GUARD::QAB(A)
    • S(c);CHECK,N_GUARD::QAB(A),XS(c)
    • P(a);OGATEB,P_PINQ(A)::QAR(A),XQ(a)
    • P(a);OGATEB::QAR(A),XS(a)
    • P(a);OGATEB::QAR(A),XB(a)
    • P(a);OGATEB,P_PINQ(A)::QAR(A),XR(a)
    • P(e);N_GUARD::QAR2(A)
  • Tries
    • Try
      • B(F);XR(k)
      • Threat
        • B(F)
      • Vars
        • S(c);CHECK,N_GUARD::QAB(A),XS(c)
      • Refutation
        • S(i);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XQ(a)
        • P(a);CHECK,OGATEB::QAR(A),XR(a)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • P(a);CHECK,OGATEB::QAR(A),XQ(a)
        • P(a);CHECK,OGATEB::QAR(A),XR(a)
      • Refutation
        • S(c);CHECK
  • Actual
    • S(C);
    • Vars
      • S(c);CHECK,N_GUARD::QAB(A),XS(c)
      • K(h);P_SPINR(k),S_FLIGHT::QAR2(A),XP(e)
      • S(i);N_GUARD,XB(F)::QAR2(A)
      • R(k);::S(C)
      • S(c);N_GUARD::QAB(A)
      • S(i);N_GUARD::QAR2(A)
      • S(i);N_GUARD::QAR2(A),XS(i)
      • P(d);N_GUARD::S(C)
      • P(e);N_GUARD::QAR2(A)
      • P(f);N_GUARD::QAB(A)
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