MESON Chess Problem Database

Problem Display
PID: 156303 (3R1R2/4p2N/r1p3pK/4kPN1/3r4/p3P3/BQ4bb/q5n1 w - - 0 1)

de Rooij, C

Comm., Grantham Journal, 1932

3R1R2/4p2N/r1p3pK/4kPN1/3r4/p3P3/BQ4bb/q5n1

#2

9 + 11

1577 Jaarboek 1933

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qxd4#
    • 1...Qc1
      • 2.Qxd4#
    • 1...Qe1
      • 2.Qxd4#
    • 1...Qf1
      • 2.Qxd4#
    • 1...Qxa2
      • 2.Qxd4#
    • 1...Be4
      • 2.Qxh2#
    • 1...Bd5
      • 2.Qb8#
    • 1...Bf4
      • 2.exd4#
  • Tries
    • 1.Rd5+?
      • 1...Bxd5
        • 2.Qb8#
      • 1...cxd5!
  • Keys
    • 1.Bb1!
      • threat
        • 2.Sf7#
      • 1...Qxb1
        • 2.Qxd4#
      • 1...gxf5
        • 2.Rxf5#
      • 1...Qa2
        • 2.Qxd4#
      • 1...Be4
        • 2.Qxh2#
      • 1...Bd5
        • 2.Qb8#
      • 1...Bf4
        • 2.exd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_GUARD::QAB1(B),XR(f)
    • Q(a);N_GUARD,XB(A)::QAB1(B),XR(f)
    • B(c);OGATE::QAB(B),XB(d)
    • B(c);::QAB(B)
    • B(d);P_PINS(E),SBLOCK::P(C),XR(f)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • B(c);XR(H)::QAB(B)
      • Refutation
        • P(i);XR(H)
  • Actual
    • B(A);
    • Threat
      • S(E)
    • Vars
      • Q(a);N_GUARD,XB(A)::QAB1(B),XR(f)
      • P(j);OGATE,XP(D)::R1(I),XP(j)
      • Q(a);N_GUARD::QAB1(B),XR(f)
      • B(c);OGATE::QAB(B),XB(d)
      • B(c);::QAB(B)
      • B(d);P_PINS(E),SBLOCK::P(C),XR(f)
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Developed and maintained by Brian Stephenson.
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