MESON Chess Problem Database

Problem Display
PID: 264929 (rb6/1Rp1K2B/8/3P2Q1/pBk5/1N2Ppp1/1p4q1/8 w - - 0 1)

Lewis, Robert Tony

McDowell, Michael

The Problemist, 1993

rb6/1Rp1K2B/8/3P2Q1/pBk5/1N2Ppp1/1p4q1/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Sd2#
    • 1...Qh1
      • 2.Sd2#
    • 1...Qh3
      • 2.Sd2#
    • 1...Qg1
      • 2.Sd2#
    • 1...Qd2
      • 2.Sxd2#
    • 1...Ra5
      • 2.Sxa5#
    • 1...Ba7
      • 2.Sa5#
    • 1...f2
      • 2.Sd2#
  • Tries
    • 1.Qf4+?
      • 1...Kxd5
        • 2.Qe4#
      • 1...Kxb3!
    • 1.Qh4+?
      • 1...Kxd5
        • 2.Qe4#
      • 1...Kxb3!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Qe6#
        • 2.Qe4#
      • 1...Kxb3!
    • 1.d6?
      • threat
        • 2.Qg8#
      • 1...Kxb3
        • 2.Qd5#
        • 2.Qg8#
      • 1...Qh3
        • 2.Sd2#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Ra5
        • 2.Sxa5#
      • 1...Ba7
        • 2.Sa5#
      • 1...f2
        • 2.Sd2#
      • 1...cxd6!
  • Keys
    • 1.Qg8!
      • threat
        • 2.d6#
      • 1...Kxb3
        • 2.d6#
      • 1...Qh3
        • 2.Sd2#
      • 1...Qd2
        • 2.Sxd2#
      • 1...Ra5
        • 2.Sxa5#
      • 1...Ba7
        • 2.Sa5#
      • 1...f2
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(b);N_GUARD::S(A)
    • Q(b);N_GUARD::S(A),XQ(b)
    • R(h);N_GUARD::S(A),XR(h)
    • B(i);S_CUTR(h)::S(A)
    • P(c);S_CUTQ(b)::S(A)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT,XP(D)::QAB1(E)
      • Refutation
        • K(f);S_FLIGHT,XS(A)
    • Try
      • Q(E);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT,XP(D)::QAB1(E)
      • Refutation
        • K(f);S_FLIGHT,XS(A)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(f);S_FLIGHT,XS(A)
    • Try
      • P(D);
      • Threat
        • QAB(E)
      • Vars
        • Q(b);N_GUARD::S(A)
        • Q(b);N_GUARD::S(A),XQ(b)
        • R(h);N_GUARD::S(A),XR(h)
        • B(i);S_CUTR(h)::S(A)
        • P(c);S_CUTQ(b)::S(A)
      • Refutation
        • P(g);XP(D)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+P(D)
    • Vars
      • K(f);S_FLIGHT,XS(A)::QAB(E)+P(D)
      • Q(b);N_GUARD::S(A)
      • Q(b);N_GUARD::S(A),XQ(b)
      • R(h);N_GUARD::S(A),XR(h)
      • B(i);S_CUTR(h)::S(A)
      • P(c);S_CUTQ(b)::S(A)
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