MESON Chess Problem Database

Problem Display
PID: 1183 (4R3/3p2pK/7n/r3pkr1/4p1N1/4Bb1B/8/5Q2 w - - 0 1)

Shire, David J

Problem Observer, 1998

4R3/3p2pK/7n/r3pkr1/4p1N1/4Bb1B/8/5Q2

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Rxe5#
    • 1...Ra2
      • 2.Rxe5#
    • 1...Ra3
      • 2.Rxe5#
    • 1...Ra4
      • 2.Rxe5#
    • 1...Ra6
      • 2.Rxe5#
    • 1...Ra7
      • 2.Rxe5#
    • 1...Ra8
      • 2.Rxe5#
    • 1...d5
      • 2.Rxe5#
  • Keys
    • 1.Qa6!
      • threat
        • 2.Sxh6#
      • 1...Rxa6
        • 2.Rxe5#
      • 1...Rxg4
        • 2.Qg6#
      • 1...Bxg4
        • 2.Qf1#
      • 1...Sxg4
        • 2.Rf8#
      • 1...Sf7
        • 2.Sh6#
      • 1...Sg8
        • 2.Sh6#
      • 1...d6
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 7
  • Sets
    • R(c);N_GUARD::R1(F),XP(d)
    • P(h);S_CUTR(c)::R1(F),XP(d)
  • Actual
    • Q(A);N_PINB(a)
    • Threat
      • B(C)+S(D),DCHECK,XS(g)
    • Vars
      • R(c);N_GUARD,XQ(A)::R1(F),XP(d)
      • R(f);N_GUARD,P_SPINR(f),XS(D)::QAB1(A)
      • B(a);OGATEB,P_SPINB(a),XS(D)::QAR(A)
      • S(g);N_GUARD,P_SPINS(g),XS(D)::R(F)
      • S(g);::B(C)+S(D),DCHECK
      • P(h);OGATEB::QAB(A)
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