MESON Chess Problem Database

Problem Display
PID: 141199 (8/Kbp1R3/p1p2b2/4N3/3k1p2/Q3NP2/1pPnp3/1q1n4 w - - 0 1)

Lane, Henry Fitzgerald William

2nd Prize, Brighton Society, 1901

(First published on Sat Oct 19 1901)

8/Kbp1R3/p1p2b2/4N3/3k1p2/Q3NP2/1pPnp3/1q1n4

#2

7 + 12

15 British Chess Magazine 1902
14867 BCPS Library 2011
14868 Pirnie Collection 2011
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Bc8
      • 2.Sxc6#
    • 1...Sxf3
      • 2.Sxf3#
    • 1...c5
      • 2.Qd3#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qc5#
        • 2.Qd3#
      • 1...Bxe7
        • 2.Qd3#
      • 1...Sb3
        • 2.Qb4#
      • 1...e1S
        • 2.Qc5#
      • 1...Sf2
        • 2.Qc5#
      • 1...Sc3
        • 2.Qc5#
      • 1...Sc4
        • 2.Re4#
        • 2.Qd3#
      • 1...Se4
        • 2.Rxe4#
        • 2.Qd3#
      • 1...c5
        • 2.Qxc5#
        • 2.Qd3#
      • 1...Qxc2!
    • 1.Qb4+?
      • 1...Kxe3
        • 2.Qc5#
      • 1...Sc4!
    • 1.c3+?
      • 1...Kxe3
        • 2.Qc5#
      • 1...Sxc3!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Sf5#
      • 1...Kxe3
        • 2.Qc5#
      • 1...Qxc2
        • 2.Sxc2#
      • 1...Bxe5
        • 2.Qxe5#
      • 1...Sxe3
        • 2.c3#
      • 1...Sxf3
        • 2.Sxf3#
      • 1...fxe3
        • 2.Rd7#
      • 1...Bc8
        • 2.Sxc6#
      • 1...c5
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(k);N_GUARD::S(E),XP(i)
    • S(d);XP(D)::S(E),XS(d)
    • P(i);SBLOCK::QAR1(B)
  • Tries
    • Try
      • S(E);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);XR(G)::QAR1(B)
        • S(d);N_GUARD::QAR2(B)
        • P(e);::QAB1(B)
        • S(b);::QAB1(B)
      • Refutation
        • Q(a);XP(A)
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(C)::QAB(B)
      • Refutation
        • S(d);P_SPINS(d)
    • Try
      • P(A);CHECK
      • Vars
        • K(f);S_FLIGHT,XS(C)::QAB(B)
      • Refutation
        • S(b);XP(A)
  • Actual
    • Q(B);
    • Threat
      • S(C)
    • Vars
      • K(f);S_FLIGHT,XS(C)::QAB(B)
      • Q(a);XP(A)::S(C),XQ(a)
      • B(j);OGATE,XS(E)::QAB1(B),XB(j)
      • S(b);N_GUARD,SBLOCK,XS(C)::P(A)
      • S(d);XP(D)::S(E),XS(d)
      • P(g);SBLOCK,XS(C)::R(G)
      • B(k);N_GUARD::S(E),XP(i)
      • P(i);SBLOCK::QAR2(B),XS(d)
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