MESON Chess Problem Database

Problem Display
PID: 11872 (1r3Q2/3Bn1p1/3PPNp1/R2pk1n1/2P1ppP1/B4P2/2N1R2q/Kb6 w - - 0 1)

Haring, Jacobus

3rd Prize, The Problemist, 1972

1r3Q2/3Bn1p1/3PPNp1/R2pk1n1/2P1ppP1/B4P2/2N1R2q/Kb6

#2

13 + 11

259 Thema Danicum 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf3
      • 2.Rxe4#
    • 1...Sh3
      • 2.Rxe4#
    • 1...Sxe6
      • 2.Rxe4#
    • 1...Sh7
      • 2.Rxe4#
    • 1...Sf5
      • 2.Rxd5#
    • 1...Sc6
      • 2.Rxd5#
    • 1...Sc8
      • 2.Rxd5#
    • 1...Sg8
      • 2.Rxd5#
  • Tries
    • 1.Bb2+?
      • 1...Kxd6
        • 2.Qxb8#
      • 1...Rxb2!
  • Keys
    • 1.Sxe4!
      • threat
        • 2.Qxg7#
      • 1...Rxf8
        • 2.Bb2#
      • 1...Sxe6
        • 2.Sf2#
      • 1...Qh6
        • 2.Sxg5#
      • 1...Qh7
        • 2.Sxg5#
      • 1...Qh8
        • 2.Sxg5#
      • 1...Sh7
        • 2.Sf2#
      • 1...Sf5
        • 2.Rxd5#
      • 1...Sg8
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(g);N_GUARD,XP(E)::R1(C),XP(c)
    • S(g);N_GUARD::R1(C),XP(c)
    • S(g);N_GUARD,XP(J)::R1(C),XP(c)
    • S(i);N_GUARD::R1(H),XP(e)
  • Tries
    • Try
      • B(D);CHECK
      • Vars
        • K(f);N_SPINP(c),P_SPINS(i),S_FLIGHT,XP(I)::QAB(M),XR(k)
      • Refutation
        • R(k);XB(D)
  • Actual
    • S(K);P_PINP(e),XP(c)
    • Threat
      • QAB(M),XP(j)
    • Vars
      • R(k);N_GUARD,XQ(M)::B(D)
      • S(g);N_GUARD,XP(J)::R(C)+S(K)
      • Q(b);N_GUARD::R(C)+S(K),XS(g)
      • S(g);N_GUARD::R(C)+S(K)
      • S(i);N_GUARD::R1(H),XP(e)
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