MESON Chess Problem Database

Problem Display
PID: 141860 (5n2/1Q5n/7R/2P2kP1/8/2K2N1P/b3N3/8 w - - 0 1)

Lane, Henry Fitzgerald William

1st Prize, Liverpool Weekly Mercury, 1898

(First published on Sat Jul 9 1898)

5n2/1Q5n/7R/2P2kP1/8/2K2N1P/b3N3/8

#2

8 + 4

14867 BCPS Library 2011
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qd5#
      • 2.Qxb1#
    • 1...Bd5
      • 2.Qxd5#
    • 1...Be6
      • 2.Qb1#
    • 1...Bf7
      • 2.Qb1#
    • 1...Bg8
      • 2.Qb1#
    • 1...Sf6
      • 2.Rxf6#
    • 1...Se6
      • 2.Qxh7#
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qe4#
      • 1...Sxg5
        • 2.Sh4#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Bb1
        • 2.Qd5#
        • 2.Qxb1#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Se6+!
    • 1.Qb4?
      • threat
        • 2.Sg3#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Sg6
        • 2.Qg4#
      • 1...Se6
        • 2.Sg3#
        • 2.Qg4#
      • 1...Bc4!
    • 1.Qd7+?
      • 1...Ke4
        • 2.Qd3#
      • 1...Be6
        • 2.Qd3#
      • 1...Se6
        • 2.Qd3#
        • 2.Qxh7#
      • 1...Sxd7!
    • 1.Qe7?
      • threat
        • 2.Sfd4#
        • 2.Sh4#
        • 2.Qe5#
      • 1...Se6
        • 2.Qxh7#
      • 1...Sf6
        • 2.Rxf6#
        • 2.Qe5#
      • 1...Sg6
        • 2.Sfd4#
      • 1...Sd7
        • 2.Sfd4#
        • 2.Sh4#
        • 2.Qxh7#
      • 1...Be6!
    • 1.Qxh7+?
      • 1...Sg6
        • 2.Qxg6#
      • 1...Sxh7!
  • Keys
    • 1.Re6!
      • threat
        • 2.Qe4#
      • 1...Kxe6
        • 2.Sed4#
      • 1...Bxe6
        • 2.Qb1#
      • 1...Sxg5
        • 2.Sfd4#
      • 1...Sxe6
        • 2.Qxh7#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Bb1
        • 2.Qd5#
      • 1...Bd5
        • 2.Qxd5#

Anticipated by 4842(1892)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);N_GUARD::QAR2(H),XB(a)
    • B(a);N_GUARD::QAB(H)
    • S(c);N_GUARD::R1(G),XS(c)
    • S(d);N_GUARD::QAB(H),XS(c)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • QAB1(H)
      • Vars
        • S(c);SBLOCK,XP(F)::S(C)
        • S(c);N_GUARD::R1(G),XS(c)
        • B(a);N_GUARD::QAR2(H),XB(a)
      • Refutation
        • S(d);CHECK
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);N_GUARD::R1(G),XS(c)
        • S(d);::QAB1(H)
      • Refutation
        • B(a);
    • Try
      • Q(H);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
        • B(a);P_SPINB(a)::QAB(H)
      • Refutation
        • S(d);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);N_GUARD::QAB(H),XS(c)
        • S(d);::S(C)
      • Refutation
        • B(a);
    • Try
      • Q(H);CHECK,XS(c)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(H),XS(d)
      • Refutation
        • S(d);XQ(H)
  • Actual
    • R(G);
    • Threat
      • QAB1(H)
    • Vars
      • K(b);S_FLIGHT,XR(G)::S(A)
      • B(a);N_GUARD,SBLOCK,XR(G)::QAB(H)
      • S(c);SBLOCK,XP(F)::S(C)
      • S(d);N_GUARD,SBLOCK,XR(G)::QAB(H),XS(c)
      • S(c);N_GUARD::R1(G),XS(c)
      • B(a);N_GUARD::QAR2(H)
      • B(a);N_GUARD::QAR2(H),XB(a)
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