MESON Chess Problem Database

Problem Display
PID: 142276 (2Nk3n/1PN2p2/2P4R/K4Bpq/2p5/3p2B1/7P/3R4 w - - 0 1)

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

Stratford Express, 1940

(First published on Fri Nov 1 1940)

2Nk3n/1PN2p2/2P4R/K4Bpq/2p5/3p2B1/7P/3R4

#2

10 + 7

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd1
      • 2.Rxh8#
    • 1...Qf3
      • 2.Rxh8#
    • 1...Qg4
      • 2.Rxh8#
    • 1...d2
      • 2.Rxd2#
    • 1...c3
      • 2.Rxd3#
  • Keys
    • 1.Bxd3!
      • threat
        • 2.Be2#
      • 1...g4+
        • 2.Bf5#
      • 1...Qxd1
        • 2.Rxh8#
      • 1...Qxh6
        • 2.Bg6#
      • 1...cxd3
        • 2.Rxd3#
      • 1...Qe2
        • 2.Bxe2#
      • 1...Qf3
        • 2.Rxh8#
      • 1...Qg4
        • 2.Rxh8#
      • 1...Qg6
        • 2.Bxg6#
      • 1...Qh3
        • 2.Bf5#
      • 1...Qh4
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD,N_SPINP(a),XR(A)::R(G),XS(g)
    • Q(d);N_GUARD::R(G),XS(g)
    • P(a);OGATEB::R(A),XP(a)
    • P(b);N_GUARD::R(A),XP(a)
  • Actual
    • B(E);XP(a)
    • Threat
      • R(A)+B(E)
    • Vars
      • P(c);CHECK,S_CUTQ(d)::R(A)+B(E)
      • Q(d);N_GUARD,XR(A)::R(G),XS(g)
      • Q(d);N_GUARD,XR(G)::R(A)+B(E)
      • P(b);OGATE,P_SPINP(b),XB(E)::R(A),XP(b)
      • Q(d);::R(A)+B(E),XQ(d)
      • Q(d);N_GUARD::R(G),XS(g)
      • Q(d);N_GUARD::R(A)+B(E),XQ(d)
      • Q(d);N_GUARD::R(A)+B(E)
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