MESON Chess Problem Database

Problem Display
PID: 22299 (8/1p6/n1p1P1B1/2rP1P1P/1n1Q1B1K/b2R1P1P/brk1N1N1/8 w - - 0 1)

Haring, Jacobus

Northwest Chess, 1976

8/1p6/n1p1P1B1/2rP1P1P/1n1Q1B1K/b2R1P1P/brk1N1N1/8

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Se3#
    • 1...Bb1
      • 2.Se1#
      • 2.Se3#
  • Tries
    • 1.Rc3+?
      • 1...Kb1
        • 2.Qg1#
        • 2.Qd1#
      • 1...Rxc3!
    • 1.Qc3+?
      • 1...Kb1
        • 2.Rd1#
      • 1...Rxc3!
  • Keys
    • 1.f6!
      • threat
        • 2.Rc3#
      • 1...Kb1
        • 2.Rd1#
      • 1...Sxd3
        • 2.Qxd3#
      • 1...Rc3
        • 2.Rxc3#
      • 1...Rb1
        • 2.Se3#
      • 1...Rb3
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(b);SBLOCK::S(B)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • R(f);XR(C)
    • Try
      • Q(F);CHECK
      • Vars
        • K(c);S_FLIGHT::R(C)
      • Refutation
        • R(f);XQ(F)
  • Actual
    • P(J);
    • Threat
      • B(M)+R(C),DCHECK
    • Vars
      • K(c);S_FLIGHT::B(M)+R(C),DCHECK
      • S(e);OGATE,P_SPINS(e),XR(C)::QAB1(F),XS(e)
      • R(f);::B(M)+R(C),DCHECK,XR(f)
      • R(b);SBLOCK::S(B)
      • R(b);SBLOCK::B(M)+R(C),DCHECK
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