MESON Chess Problem Database

Problem Display
PID: 271595 (k4r1r/p1BRn2q/K3p3/4p3/1Q2b3/3p1n2/8/8 w - - 0 1)

Kipping, Cyril Stanley

The Problemist, 1956

k4r1r/p1BRn2q/K3p3/4p3/1Q2b3/3p1n2/8/8

#2

4 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bf5
      • 2.Qb7#
    • 1...Bg6
      • 2.Qb7#
    • 1...Bb7+
      • 2.Qxb7#
    • 1...Sd5
      • 2.Qb7#
    • 1...Sf5
      • 2.Qxe4#
    • 1...Sc6
      • 2.Qb7#
    • 1...Sg6
      • 2.Qxe4#
    • 1...Sc8
      • 2.Qb8#
    • 1...Sg8
      • 2.Qxf8#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Rxa7#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Sd5
        • 2.Qb7#
      • 1...Sf5
        • 2.Qxe4#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sg6
        • 2.Qxe4#
      • 1...Sc8
        • 2.Qb8#
      • 1...Sg8!
    • 1.Rd8+?
      • 1...Sc8
        • 2.Qb8#
      • 1...Rxd8!
    • 1.Qb6?
      • threat
        • 2.Qxa7#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sc8
        • 2.Qb8#
      • 1...axb6!
  • Keys
    • 1.Bxe5!
      • threat
        • 2.Rxa7#
      • 1...Bb7+
        • 2.Qxb7#
      • 1...Sd5
        • 2.Qb7#
      • 1...Sf5
        • 2.Qxe4#
      • 1...Sc6
        • 2.Qb7#
      • 1...Sg6
        • 2.Qxe4#
      • 1...Sc8
        • 2.Qb8#
      • 1...Sg8
        • 2.Qxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 2
  • Sets
    • B(c);N_GUARD::QAB1(A)
    • B(c);CHECK,N_GUARD::QAB1(A),XB(c)
    • S(g);S_CUTB(c)::QAB1(A)
    • S(g);N_GUARD,S_CUTQ(h)::QAB(A),XB(c)
    • S(g);S_CUTR(j)::QAR1(A)
    • S(g);OGATE::QAR(A),XR(j)
  • Tries
    • Try
      • B(C);
      • Threat
        • R1(D),XP(f)
      • Vars
        • B(c);CHECK,N_GUARD::QAB1(A),XB(c)
        • S(g);S_CUTB(c)::QAB1(A)
        • S(g);N_GUARD,S_CUTQ(h)::QAB(A),XB(c)
        • S(g);S_CUTR(j)::QAR1(A)
      • Refutation
        • S(g);
    • Try
      • R(D);CHECK
      • Vars
        • S(g);P_SPINS(g)::QAR1(A)
      • Refutation
        • R(j);XR(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A),XP(f)
      • Vars
        • B(c);CHECK,N_GUARD::QAB1(A),XB(c)
        • S(g);S_CUTB(c)::QAB1(A)
        • S(g);S_CUTR(j)::QAR1(A)
      • Refutation
        • P(f);XQ(A)
  • Actual
    • B(C);XP(d)
    • Threat
      • R1(D),XP(f)
    • Vars
      • B(c);CHECK,N_GUARD::QAB1(A),XB(c)
      • S(g);S_CUTB(c)::QAB1(A)
      • S(g);N_GUARD,S_CUTQ(h)::QAB(A),XB(c)
      • S(g);S_CUTR(j)::QAR1(A)
      • S(g);OGATE::QAR(A),XR(j)
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