MESON Chess Problem Database

Problem Display
PID: 161986 (B7/Br1P4/1PQp3K/q2P4/R1NkN3/3PR3/1r3P2/8 w - - 0 1)

Dujardin, Paul

HM., Die Schwalbe 073. TT, 1944

B7/Br1P4/1PQp3K/q2P4/R1NkN3/3PR3/1r3P2/8

#2

13 + 5

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Tries
    • 1.Scd2+?
      • 1...Qb4
        • 2.Sf3#
      • 1...Qxa4
        • 2.Sf3#
      • 1...Rb4
        • 2.Sf3#
      • 1...Ke5!
    • 1.Se5+?
      • 1...Qb4
        • 2.Sf3#
      • 1...Qxa4
        • 2.Sf3#
      • 1...Rb4
        • 2.Sf3#
      • 1...Kxe5!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Qe5#
      • 1...Qxb6
        • 2.Sxb2#
      • 1...Qxd5
        • 2.Sxb2#
      • 1...R2xb6
        • 2.Sxa5#
      • 1...R7xb6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::S(E)
        • Q(c);XR(D)::S(E)
        • R(a);P_SPINR(a)::S(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::S(E)
        • Q(c);XR(D)::S(E)
        • R(a);P_SPINR(a)::S(E)
      • Refutation
        • K(b);S_FLIGHT,XS(E)
  • Actual
    • Q(I);XP(d)
    • Threat
      • QAB1(I)
    • Vars
      • Q(c);N_GUARD,P_PINQ(I),P_SPINQ(c),XP(H)::R(D)+S(E),XR(a)
      • Q(c);N_GUARD,P_SPINQ(c),XP(G)::R(D)+S(E),XR(a)
      • R(a);N_GUARD,P_PINQ(I),P_SPINR(a),XP(H)::R(D)+S(E),XQ(c)
      • R(e);P_PINQ(I),P_SPINR(e),XP(H)::QAB(I)
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