MESON Chess Problem Database

Problem Display
PID: 227076 (KB1Rbq2/1p1r4/8/p3p3/R2Pk1B1/4p3/Q1P1Nb2/8 w - - 0 1)

Brown, David Leo

US Problem Bulletin, 1985

KB1Rbq2/1p1r4/8/p3p3/R2Pk1B1/4p3/Q1P1Nb2/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qh6
      • 2.d5#
    • 1...Qg7
      • 2.d5#
    • 1...Qf3
      • 2.d5#
    • 1...Qf4
      • 2.Sc3#
      • 2.d5#
    • 1...Qf5
      • 2.d5#
    • 1...Qf6
      • 2.d5#
    • 1...Qf7
      • 2.d5#
    • 1...Qg8
      • 2.d5#
    • 1...Qh8
      • 2.d5#
    • 1...Rxd4
      • 2.Qd5#
    • 1...Rd5
      • 2.Qxd5#
    • 1...Rc7
      • 2.Qd5#
    • 1...Re7
      • 2.Qd5#
    • 1...Rf7
      • 2.Qd5#
    • 1...Rg7
      • 2.Qd5#
    • 1...Rh7
      • 2.Qd5#
    • 1...exd4
      • 2.Sc3#
      • 2.Qe6#
  • Tries
    • 1.dxe5+?
      • 1...Rd4
        • 2.Raxd4#
        • 2.Rdxd4#
        • 2.Qd5#
      • 1...Qb4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.c4#
      • 1...Kd5
        • 2.Qxb7#
      • 1...Rxd4
        • 2.c3#
      • 1...exd4
        • 2.Sc3#
      • 1...Qa3
        • 2.Qh1#
      • 1...Qb4
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 14
  • Sets
    • Q(i);N_GUARD::R(D)+P(E)
    • R(g);N_GUARD,P_SPINR(g),XP(E)::QAB1(A)
    • R(g);N_GUARD::QAB1(A),XR(g)
    • R(g);N_GUARD::QAB1(A)
  • Tries
    • Try
      • P(E);CHECK,XP(e)
      • Refutation
        • Q(i);P_SPINQ(i)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(c);P_SPINR(g),S_FLIGHT::QAB(A),XP(f)
      • R(g);P_SPINR(g),XP(E)::QAB(A)+P(B)
      • P(e);P_SPINP(e),XP(E)::S(C)
      • Q(i);N_GUARD::QAB(A)
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Developed and maintained by Brian Stephenson.
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