MESON Chess Problem Database

Problem Display
PID: 4842 (2n5/n5Q1/4R3/1Pk2P2/8/P1N5/3N3b/5K2 w - - 0 1)

Laws, Benjamin Glover

1st Prize, Jamaica Gleaner, 1892

2n5/n5Q1/4R3/1Pk2P2/8/P1N5/3N3b/5K2

#2

8 + 4

5501 Chess Cameos 1936
3310 2345 Chess Problems 1997
6004 Henk Hagedoorn Solving Ty. 2011
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qe5#
      • 2.Qxg1#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bd6
      • 2.Qg1#
    • 1...Bc7
      • 2.Qg1#
    • 1...Bb8
      • 2.Qg1#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Sd6
      • 2.Qxa7#
  • Tries
    • 1.Qxa7+?
      • 1...Sb6
        • 2.Qxb6#
      • 1...Sxa7!
    • 1.Qd7?
      • threat
        • 2.Sa4#
        • 2.Sce4#
        • 2.Qd5#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Sd6
        • 2.Qxa7#
      • 1...Sb6
        • 2.Sce4#
      • 1...Se7
        • 2.Sa4#
        • 2.Sce4#
        • 2.Qxa7#
      • 1...Bd6!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qd4#
      • 1...Kxd6
        • 2.Sde4#
      • 1...Bxd6
        • 2.Qg1#
      • 1...Sxb5
        • 2.Sce4#
      • 1...Sxd6
        • 2.Qxa7#
      • 1...Sc6
        • 2.Rxc6#
      • 1...Bg1
        • 2.Qe5#
      • 1...Be5
        • 2.Qxe5#

This anticipates 141860(1898)

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
      • Q(H);CHECK,XS(c)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB1(H),XS(d)
      • Refutation
        • S(d);XQ(H)
    • Try
      • Q(H);
      • Threat
        • DUALS(3)
      • Vars
        • S(c);N_GUARD::R1(G),XS(c)
        • S(d);N_GUARD::QAB(H),XS(c)
        • S(d);::S(D)
      • Refutation
        • B(a);
  • Actual
    • R(G);
    • Threat
      • QAB1(H)
    • Vars
      • K(b);S_FLIGHT,XR(G)::S(B)
      • B(a);N_GUARD,SBLOCK,XR(G)::QAB(H)
      • S(c);SBLOCK,XP(E)::S(D)
      • 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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