MESON Chess Problem Database

Problem Display
PID: 54638 (r3R3/pP5B/Q1PNPK2/8/1PPkPp2/3b4/p2B3b/2rN4 w - - 0 1)

Postance, Neil

The Problemist Supplement, 2003

r3R3/pP5B/Q1PNPK2/8/1PPkPp2/3b4/p2B3b/2rN4

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Bc3#
    • 1...Rb1
      • 2.Bc3#
    • 1...Rc3
      • 2.Bxc3#
    • 1...Rxc4
      • 2.Sb5#
    • 1...Rb8
      • 2.Qxa7#
    • 1...Rc8
      • 2.Qxa7#
    • 1...Rd8
      • 2.Qxa7#
    • 1...Rxe8
      • 2.Qxa7#
    • 1...f3
      • 2.Be3#
  • Keys
    • 1.Rd8!
      • threat
        • 2.Sc8#
      • 1...Rxd8
        • 2.Qxa7#
      • 1...Bxc4
        • 2.Sb5#
      • 1...Bxe4
        • 2.Sf5#
      • 1...Rc8
        • 2.Sxc8#
        • 2.Qxa7#
      • 1...f3
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(a);N_GUARD::B(B)
    • R(a);N_GUARD::B(B),XR(a)
    • R(a);SBLOCK,XP(D)::S(H)
    • R(h);N_GUARD::QAB(F),XP(g)
    • R(h);N_GUARD,XR(M)::QAB(F),XP(g)
    • P(f);N_GUARD::B(B)
  • Actual
    • R(M);
    • Threat
      • R(M)+S(H)
    • Vars
      • R(h);N_GUARD,XR(M)::QAB(F),XP(g)
      • B(d);SBLOCK,XP(D)::R(M)+S(H),DCHECK
      • B(d);SBLOCK,XP(E)::R(M)+S(H),DCHECK
      • P(f);N_GUARD::B(B)
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