MESON Chess Problem Database

Problem Display
PID: 268338 (B3R3/7Q/2N1r1N1/8/R1r1kP2/4B2K/3P4/8 w - - 0 1)

Haring, Jacobus

1st Prize, KeyStip 27B. Ty., 1981

B3R3/7Q/2N1r1N1/8/R1r1kP2/4B2K/3P4/8

#2

10 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Sd4#
  • Tries
    • 1.Sb4+?
      • 1...Rc6
        • 2.Sh4#
      • 1...Kf5!
    • 1.Sd4+?
      • 1...Kd3
        • 2.Se5#
      • 1...Rc6!
    • 1.Sce5+?
      • 1...Rc6
        • 2.Se7#
      • 1...Kf5!
    • 1.Sce7+?
      • 1...Rc6
        • 2.Sh4#
        • 2.Se5#
      • 1...Kd3!
    • 1.Sge5+?
      • 1...Rg6
        • 2.Se7#
      • 1...Kd5!
    • 1.Sf8+?
      • 1...Kf3
        • 2.Sd4#
      • 1...Kd5!
    • 1.Sh8+?
      • 1...Kf3
        • 2.Sd4#
      • 1...Kd5!
    • 1.Rxe6+?
      • 1...Kf3
        • 2.Sd4#
        • 2.Qh5#
      • 1...Kd5
        • 2.Qd7#
      • 1...Kf5
        • 2.Sf8#
        • 2.Qf7#
      • 1...Kd3!
  • Keys
    • 1.Sge7+!
      • 1...Kf3
        • 2.Sd4#
      • 1...Rg6
        • 2.Se5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,N_SPINR(a),S_FLIGHT::B(I)+S(F),DCHECK
  • Tries
    • Try
      • S(F);CHECK,N_PINR(a),P_PINR(c)
      • Vars
        • R(a);N_SPINR(c),P_SPINR(a)::QAB(H)+S(G)
      • Refutation
        • K(b);N_SPINR(c),S_FLIGHT
    • Try
      • S(F);CHECK,N_PINR(a),P_PINR(c)
      • Vars
        • K(b);N_SPINR(c),S_FLIGHT::QAB(H)+S(G),DCHECK
      • Refutation
        • R(a);N_SPINR(c),P_SPINR(a)
    • Try
      • S(F);CHECK
      • Vars
        • R(c);::QAB(H)+S(G)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • S(F);CHECK
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • R(c);::B(I)+S(F)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::B(I)+S(F),DCHECK
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(b);N_SPINR(a),S_FLIGHT::B(I)+S(F),DCHECK
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
    • Try
      • R(J);CHECK,XR(c)
      • Vars
        • K(b);N_GUARD,N_SPINR(a),S_FLIGHT::QAR2(H)
      • Refutation
        • K(b);N_SPINR(a),S_FLIGHT
  • Actual
    • S(G);CHECK
    • Vars
      • K(b);N_SPINR(a),S_FLIGHT::B(I)+S(F),DCHECK
      • R(c);::B(I)+S(F)
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