MESON Chess Problem Database

Problem Display
PID: 87448 (b6B/2Qp3K/Bp5p/3k4/7r/4R3/8/b7 w - - 0 1)

Boy, Claude

Lochet, Jean

The Problemist, 1976

b6B/2Qp3K/Bp5p/3k4/7r/4R3/8/b7

#2

5 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rh1
      • 2.Bc4#
    • 1...Rh2
      • 2.Bc4#
    • 1...Rh3
      • 2.Bc4#
    • 1...Rc4
      • 2.Bxc4#
    • 1...Rd4
      • 2.Re5#
    • 1...Rh5
      • 2.Bc4#
    • 1...Bd4
      • 2.Bc4#
    • 1...Bb7
      • 2.Bxb7#
  • Tries
    • 1.Re5+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Bxe5!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qxd7#
      • 1...Kxd4
        • 2.Qe5#
      • 1...Rxd4
        • 2.Re5#
      • 1...Bxd4
        • 2.Bc4#
      • 1...Bc6
        • 2.Qe5#
      • 1...b5
        • 2.Qc5#
      • 1...d6
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::B(B)
    • R(b);N_GUARD::B(B),XR(b)
    • R(b);SBLOCK,S_CUTB(a)::R1(A)
    • B(a);S_CUTR(b)::B(B)
    • B(g);N_GUARD::B(B),XB(g)
  • Tries
    • Try
      • R(A);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(C)
      • Refutation
        • B(a);XR(A)
  • Actual
    • B(E);
    • Threat
      • QAR2(C),XP(f)
    • Vars
      • K(c);P-FLIGHT,XB(E)::QAB1(C)
      • R(b);SBLOCK,XB(E)::R1(A)
      • B(a);SBLOCK,XB(E)::B(B)
      • B(g);SBLOCK::QAR1(C)
      • P(d);N_GUARD::QAR1(C)
      • P(f);SBLOCK::QAB1(C)
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