MESON Chess Problem Database

Problem Display
PID: 69852 (8/8/8/1p1np1K1/p3R3/P2kppNR/Q7/1N5B w - - 0 1)

Burger, Robert Eugene

1st Prize, BCF, 1953-1954

8/8/8/1p1np1K1/p3R3/P2kppNR/Q7/1N5B

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...e2
      • 2.Qd2#
    • 1...f2
      • 2.Qe2#
    • 1...b4
      • 2.Qc4#
  • Tries
    • 1.Rh2?
      • threat
        • 2.Qxd5#
        • 2.Qc2#
      • 1...Sc3
        • 2.Qc2#
      • 1...Sf4
        • 2.Qc2#
      • 1...Sb6
        • 2.Qc2#
      • 1...Sf6
        • 2.Qc2#
      • 1...Sc7
        • 2.Qc2#
      • 1...Se7
        • 2.Qc2#
      • 1...e2
        • 2.Qd2#
      • 1...f2
        • 2.Qe2#
      • 1...Sb4!
    • 1.Qb3+?
      • 1...Sc3
        • 2.Qxc3#
      • 1...axb3!
    • 1.Qb2?
      • 1...Sc3
        • 2.Qxc3#
      • 1...Sb4
        • 2.Qc3#
      • 1...Sf4
        • 2.Qc3#
      • 1...Sb6
        • 2.Qc3#
      • 1...Sf6
        • 2.Qc3#
      • 1...Sc7
        • 2.Qc3#
      • 1...Se7
        • 2.Qc3#
      • 1...e2
        • 2.Qd2#
      • 1...f2
        • 2.Qe2#
      • 1...b4!
  • Keys
    • 1.Sf5!
      • 1...Kxe4
        • 2.Qc2#
      • 1...Sc3
        • 2.Rxe3#
      • 1...Sb4
        • 2.Rxe3#
      • 1...Sf4
        • 2.Rxe3#
      • 1...Sb6
        • 2.Rxe3#
      • 1...Sf6
        • 2.Rxe3#
      • 1...Sc7
        • 2.Rxe3#
      • 1...Se7
        • 2.Rxe3#
      • 1...e2
        • 2.Qxe2#
      • 1...f2
        • 2.Qd2#
      • 1...b4
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(b);N_GUARD::QAR1(C)
    • P(c);N_GUARD::QAB1(C)
    • P(e);N_GUARD::QAB1(C)
  • Tries
    • Try
      • R(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(f);::QAB1(C)
        • P(b);N_GUARD::QAR1(C)
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • S(f);
    • Try
      • Q(C);CHECK
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAR1(C),XS(f)
      • Refutation
        • P(d);XQ(C)
    • Try
      • Q(C);
      • Vars
        • S(f);N_GUARD::QAR1(C),XS(f)
        • S(f);N_GUARD::QAR1(C)
        • P(b);N_GUARD::QAR1(C)
        • P(c);N_GUARD::QAB1(C)
      • Refutation
        • P(e);
  • Actual
    • S(E);
    • Vars
      • K(a);P_SPINP(c),S_FLIGHT,XR(G)::QAB(C)
      • S(f);N_GUARD::R1(G),XP(b)
      • P(b);P_SPINP(c)::QAB1(C),XP(b)
      • P(c);P_SPINP(b)::QAR1(C)
      • P(e);N_GUARD::QAB1(C)
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