MESON Chess Problem Database

Problem Display
PID: 18093 (1Q2R3/2rp4/1pk5/1N2b3/1P1P1B2/4N3/6R1/K6B w - - 0 1)

Haring, Jacobus

3rd Prize, Magasinet, 1953/II

1Q2R3/2rp4/1pk5/1N2b3/1P1P1B2/4N3/6R1/K6B

#2

10 + 5

81 Chess 1955

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7+
      • 2.Sxa7#
    • 1...Rc8
      • 2.Sa7#
    • 1...Bxd4+
      • 2.Sxd4#
    • 1...Bd6
      • 2.Rg5#
  • Tries
    • 1.Sa7+?
      • 1...Kd6
        • 2.Bxe5#
        • 2.Rg6#
        • 2.dxe5#
      • 1...Rxa7+!
    • 1.Rxe5?
      • threat
        • 2.Rc2#
        • 2.Rg6#
        • 2.Qxc7#
      • 1...Ra7+
        • 2.Sxa7#
      • 1...d6
        • 2.Qxc7#
      • 1...Rb7
        • 2.Rc2#
        • 2.Rg6#
        • 2.Qd6#
      • 1...Rc8
        • 2.Sa7#
        • 2.Rc2#
        • 2.Rg6#
        • 2.Qxc8#
      • 1...d5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Rg6#
      • 1...Ra7+
        • 2.Ra2#
      • 1...Bxd4+
        • 2.Rb2#
      • 1...Kxd6
        • 2.Rg6#
      • 1...Bxd6
        • 2.Rg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(d);CHECK,N_GUARD::S(H),XR(d)
    • R(d);N_GUARD::S(H)
    • B(a);CHECK,XP(F)::S(H),XB(a)
    • B(a);N_PINP(F),S_CUTP(e)::B(B)+R(C)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • R(d);CHECK,XS(H)
    • Try
      • R(J);N_SPINP(F),XB(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(d);CHECK,N_GUARD::S(H),XR(d)
        • P(e);::QAR1(I),XR(d)
      • Refutation
        • P(e);
  • Actual
    • S(H);
    • Threat
      • B(B)+R(C)
    • Vars
      • R(d);CHECK::B(B)+R(C)
      • B(a);CHECK,XP(F)::B(B)+R(C)
      • K(c);P-FLIGHT,P_SPINB(a),P_SPINR(d),XS(H)::R(C)
      • B(a);N_PINP(F),XS(H)::B(B)+R(C)
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