MESON Chess Problem Database

Problem Display
PID: 161203 (5RK1/3p1NP1/8/4Pk1P/pb1P1n1B/1q6/B3Q3/5R2 w - - 0 1)

Apro, Laszlo

Problem (Zagreb), 1955

5RK1/3p1NP1/8/4Pk1P/pb1P1n1B/1q6/B3Q3/5R2

#2

11 + 6

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Qd1
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qc2
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qe6
      • 2.Bb1#
    • 1...Qxf7+
      • 2.Rxf7#
    • 1...Qb1
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qb2
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qa3
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qc3
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qd3
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qe3
      • 2.Sd6#
    • 1...Qf3
      • 2.Sh6#
    • 1...Qg3
      • 2.Sd6#
      • 2.Sh6#
    • 1...Qh3
      • 2.Sd6#
      • 2.Sh6#
  • Tries
    • 1.e6?
      • threat
        • 2.Sd6#
        • 2.Sh6#
      • 1...Bxf8
        • 2.Sh6#
      • 1...Qe3
        • 2.Sd6#
      • 1...Qf3
        • 2.Sh6#
      • 1...Bd6
        • 2.Sxd6#
        • 2.Sh6#
      • 1...d6
        • 2.Sg5#
        • 2.Sxd6#
        • 2.Sh6#
        • 2.Sd8#
        • 2.Sh8#
      • 1...Qxe6!
  • Keys
    • 1.Qg2!
      • threat
        • 2.Qg6#
      • 1...Qxf7+
        • 2.Rxf7#
      • 1...Ke6
        • 2.Sd8#
      • 1...Qe6
        • 2.Bb1#
      • 1...Qf3
        • 2.Sd6#
      • 1...Qg3
        • 2.Sh6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • Q(a);N_GUARD,SBLOCK::B(B)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XS(H)::R(J),XQ(a)
    • Q(a);N_PINS(H)::R(J)+S(H),DCHECK
    • Q(a);N_PINS(H),N_SPINS(d)::R(J)+S(H),DCHECK
  • Tries
    • Try
      • P(F);N_SPINS(H)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XR(J)::S(H)
        • Q(a);::R(J)+S(H),DCHECK
        • Q(a);N_SPINS(d)::R(J)+S(H),DCHECK
      • Refutation
        • Q(a);P_PINS(H),XP(F)
  • Actual
    • Q(C);
    • Threat
      • QAB1(C)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XS(H)::R(J),XQ(a)
      • K(e);N_PINS(H),N_SPINS(d),P_SPINQ(a),S_FLIGHT::S(H)
      • Q(a);N_GUARD,SBLOCK::B(B)
      • Q(a);N_PINS(H),N_SPINS(d)::R(J)+S(H),DCHECK
      • Q(a);N_PINS(H),P_PINP(I)::R(J)+S(H),DCHECK
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