MESON Chess Problem Database

Problem Display
PID: 12085 (8/Kpr4p/1P6/4p2Q/pNRpk1p1/r2qB1P1/2NpnPPn/1B2R3 w - - 0 1)

Haring, Jacobus

1st Prize, Schach-Echo, 1974/I

8/Kpr4p/1P6/4p2Q/pNRpk1p1/r2qB1P1/2NpnPPn/1B2R3

#2

12 + 13

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

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc4
      • 2.Qxh7#
    • 1...Rc5
      • 2.Qxh7#
    • 1...Rc8
      • 2.Qxh7#
    • 1...h6
      • 2.Qg6#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Qxe5#
      • 1...Qxg3
        • 2.Bc5#
      • 1...Qxd4
        • 2.Sxa3#
      • 1...exd4
        • 2.Qd5#
      • 1...Rc5
        • 2.Qxh7#
      • 1...Sf3
        • 2.Qxg4#
      • 1...Re7!
  • Keys
    • 1.Sxd4!
      • threat
        • 2.Qf5#
      • 1...Sxg3
        • 2.Sdc6#
      • 1...Sxd4
        • 2.Bxd2#
      • 1...exd4
        • 2.Qd5#
      • 1...Rf7
        • 2.Sxe2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • R(l);N_GUARD,N_SPINP(g),XR(I)::QAB(J),XP(m)
    • R(l);N_GUARD::QAB(J),XP(m)
    • P(m);N_GUARD::QAB(J)
  • Tries
    • Try
      • B(F);P_PINS(b),XP(g)
      • Threat
        • QAR1(J),XP(j)
      • Vars
        • Q(e);N_GUARD,XP(G)::R(I)+B(F)
        • Q(e);P_PINP(K),P_SPINQ(e),XB(F)::B(A)+S(C),XR(d)
        • P(j);OGATE,P_SPINP(j),XB(F)::QAB1(J)
        • R(l);N_GUARD::QAB(J),XP(m)
        • S(c);N_GUARD::QAR2(J),XP(i)
      • Refutation
        • R(l);
  • Actual
    • S(C);P_PINQ(e),XP(g)
    • Threat
      • QAB1(J)
    • Vars
      • S(b);N_GUARD,XP(G)::R(I)+S(C)
      • S(b);OGATEB,P_SPINS(b),XS(C)::R(B)+B(F),XP(a)
      • P(j);OGATE,P_SPINP(j),XS(C)::QAB1(J)
      • R(l);N_GUARD::R(I)+S(C),XS(b)
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