MESON Chess Problem Database

Problem Display
PID: 142379 (2b5/5n2/pbR5/N3P1r1/Pp1k1Np1/qP4K1/2BP3B/3R3r w - - 0 1)

Melvin, Herbert A ('Hamel' or Zaak, HA)

Boys' Own Paper, 1905

(First published on Sat Sep 23 1905)

2b5/5n2/pbR5/N3P1r1/Pp1k1Np1/qP4K1/2BP3B/3R3r

#2

11 + 10

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Rc4#
  • Tries
    • 1.Bg1+?
      • 1...Kxe5
        • 2.Sc4#
      • 1...Rxg1+!
    • 1.Rd6+?
      • 1...Kc5
        • 2.Sd3#
        • 2.Rd5#
        • 2.d4#
      • 1...Kxe5
        • 2.Sc4#
      • 1...Sxd6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Rd5#
      • 1...Qxb3+
        • 2.Sxb3#
      • 1...Rg1+
        • 2.Bxg1#
      • 1...Kxc5
        • 2.d4#
      • 1...Rxe5
        • 2.Rc4#
      • 1...Bxc5
        • 2.Sc6#
      • 1...Be6
        • 2.Sxe6#
      • 1...Bb7
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XP(J)::R1(K)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(d);S_FLIGHT,XP(J)::S(I)
      • Refutation
        • R(a);CHECK,XB(D)
    • Try
      • R(K);CHECK
      • Vars
        • K(d);S_FLIGHT,XP(J)::S(I)
      • Refutation
        • S(i);XR(K)
  • Actual
    • R(K);
    • Threat
      • R1(K)
    • Vars
      • Q(b);CHECK,XP(E)::S(I),XQ(b)
      • R(a);CHECK,N_GUARD::B(D),XR(a)
      • K(d);OGATE,S_FLIGHT,XR(K)::P(C)
      • R(f);SBLOCK,XP(J)::R1(K)
      • B(h);SBLOCK,XR(K)::S(I)
      • B(j);N_GUARD::S(H),XB(j)
      • B(j);N_GUARD::S(H)
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