MESON Chess Problem Database

Problem Display
PID: 63466 (Kn6/1p3p2/pP1kNQ2/1P2N3/1n2RB1q/1B1p4/8/5r1b w - - 0 1)

Haring, Jacobus

4th Prize, Main-Post, 1975

Kn6/1p3p2/pP1kNQ2/1P2N3/1n2RB1q/1B1p4/8/5r1b

#2

9 + 10

3771 FIDE Album (1974-1976) 1980
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sd7
      • 2.Sxf7#
  • Tries
    • 1.Sc4+?
      • 1...Kd5
        • 2.Sd2#
        • 2.Sd6#
        • 2.Rd4#
        • 2.Re5#
        • 2.Qd4#
        • 2.Qe5#
        • 2.Qf5#
      • 1...Kd7!
    • 1.Sc7+?
      • 1...Kc5
        • 2.Be3#
        • 2.Rc4#
      • 1...Qxf6!
    • 1.Qd8+?
      • 1...Sd7
        • 2.Sxf7#
        • 2.Qxd7#
      • 1...Qxd8!
    • 1.Qxf7?
      • threat
        • 2.Qc7#
      • 1...Qd8
        • 2.Sf3#
      • 1...Qh7
        • 2.Sf3#
      • 1...Rc1
        • 2.Sg4#
      • 1...Sd5
        • 2.Sc4#
      • 1...Sd7
        • 2.Qxd7#
      • 1...Qe7!
  • Keys
    • 1.Be3!
      • threat
        • 2.Bc5#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Qf2
        • 2.Sf4#
      • 1...Rc1
        • 2.Sg5#
      • 1...Sd7
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(j);SBLOCK::B(C)+S(E),DCHECK,XP(i)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(G);CHECK
      • Refutation
        • Q(e);XQ(H)
    • Try
      • Q(H);CHECK
      • Refutation
        • Q(e);XQ(H)
    • Try
      • Q(H);XP(i)
      • Threat
        • QAB1(H)
      • Vars
        • Q(e);N_GUARD::B(C)+S(E)
        • R(a);N_GUARD::B(C)+S(E)
        • S(d);SBLOCK::B(C)+S(E),DCHECK
        • S(j);N_GUARD::QAR1(H),XS(j)
      • Refutation
        • Q(e);
  • Actual
    • B(C);
    • Threat
      • B(C)
    • Vars
      • P(i);OGATE,P_SPINP(i),XS(G)::QAR1(H),XP(i)
      • Q(e);N_GUARD::QAR(H)+S(G)
      • R(a);N_GUARD::QAR(H)+S(G)
      • S(j);SBLOCK::S(E),XP(i)
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