MESON Chess Problem Database

Problem Display
PID: 52337 (5r2/bBN3N1/K3R3/1p4p1/5kpp/8/2br1nR1/B1Q2n2 w - - 0 1)

Copping, Peter F

The Problemist, 1956

5r2/bBN3N1/K3R3/1p4p1/5kpp/8/2br1nR1/B1Q2n2

#2

8 + 11

136 Problem Observer 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rf5
      • 2.Sh5#
    • 1...Bf5
      • 2.Sh5#
    • 1...Be3
      • 2.Be5#
    • 1...Se3
      • 2.Be5#
  • Tries
    • 1.Qxd2+?
      • 1...Be3
        • 2.Be5#
        • 2.Qd6#
      • 1...Se3
        • 2.Be5#
        • 2.Qxf2#
        • 2.Qd6#
      • 1...Sxd2!
  • Keys
    • 1.Qa3!
      • threat
        • 2.Be5#
      • 1...Rd6+
        • 2.Qxd6#
      • 1...g3
        • 2.Qf3#
      • 1...Re2
        • 2.Sd5#
      • 1...Rd3
        • 2.Qxf8#
      • 1...Rd4
        • 2.Rxf2#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Rf5
        • 2.Sh5#
      • 1...Bb3
        • 2.Qxf8#
      • 1...Bd3
        • 2.Qd6#
      • 1...Bd4
        • 2.Sd5#
      • 1...Sd3
        • 2.Qxf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 3
  • Sets
    • R(k);SBLOCK::S(H)
    • B(b);SBLOCK::S(H)
    • B(j);N_SPINR(c),SBLOCK::B(A)
    • S(a);N_SPINR(c),SBLOCK::B(A)
  • Tries
    • Try
      • Q(B);CHECK,XR(c)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • Q(B);N_PINR(c)
    • Threat
      • B(A)
    • Vars
      • R(c);CHECK,N_GUARD::QAB(B),XR(c)
      • P(f);N_GUARD::QAR1(B)
      • R(c);N_GUARD::S(G)
      • R(c);S_CUTB(b)::QAR(B),XR(k)
      • R(c);N_GUARD,S_CUTB(j)::R(C),XS(d)
      • R(c);N_GUARD::S(G),XR(c)
      • R(k);SBLOCK::S(H)
      • B(b);N_GUARD::QAR(B),XR(k)
      • B(b);S_CUTR(c)::QAB(B)
      • B(j);S_CUTR(c)::S(G)
      • S(d);S_CUTB(b)::QAR(B),XR(k)
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