MESON Chess Problem Database

Problem Display
PID: 206433 (R1n5/3k1P2/7R/3Np2r/4b2Q/Pq3r2/8/K7 w - - 0 1)

d'Orville, Peter Auguste

250 Problemes des Echecs, 1842

R1n5/3k1P2/7R/3Np2r/4b2Q/Pq3r2/8/K7

#2

7 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Rd8#
      • 2.Qe7#
      • 2.Qd8#
    • 1...Sa7
      • 2.Rd8#
      • 2.Qe7#
      • 2.Qd8#
    • 1...Se7
      • 2.Qxe7#
  • Tries
    • 1.Ra7+?
      • 1...Qb7
        • 2.Rxb7#
      • 1...Sxa7!
    • 1.f8S+?
      • 1...Ke8
        • 2.Qe7#
      • 1...Rxf8!
  • Keys
    • 1.Qd8+!
      • 1...Kxd8
        • 2.Rd6#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(g);N_GUARD::QAR1(C),XS(g)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::R(G),XQ(a)
      • Refutation
        • S(g);XR(G)
    • Try
      • P(F);CHECK
      • Vars
        • K(f);P_SPINS(g),S_FLIGHT::QAR1(C)
      • Refutation
        • R(b);XS(F)
  • Actual
    • Q(C);CHECK
    • Vars
      • K(f);P-FLIGHT,P_SPINS(g),XQ(C)::R(E)
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