MESON Chess Problem Database

Problem Display
PID: 18220 (8/2b3B1/2p2N2/p1k1nK2/5R2/1RNpp3/1n6/7Q w - - 0 1)

Diot, Roger

L'Echiquier de Paris, 1954

8/2b3B1/2p2N2/p1k1nK2/5R2/1RNpp3/1n6/7Q

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Bf8#
    • 1...Bb6
      • 2.Bf8#
    • 1...Sc4
      • 2.Sfe4#
  • Tries
    • 1.Sa4+?
      • 1...Kd6
        • 2.Bf8#
      • 1...Sxa4!
    • 1.Rb5+?
      • 1...Kd6
        • 2.Bf8#
      • 1...cxb5!
    • 1.Qe4?
      • threat
        • 2.Qd4#
      • 1...Kd6
        • 2.Bf8#
        • 2.Qxe5#
      • 1...Sf3!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa3#
      • 1...Kd6
        • 2.Bf8#
      • 1...Sbc4
        • 2.Sce4#
      • 1...Sec4
        • 2.Sfe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::B(G)
    • B(h);N_GUARD::B(G)
    • S(f);SBLOCK::S(F)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);S_FLIGHT::B(G)
      • Refutation
        • S(a);XS(C)
    • Try
      • R(B);CHECK
      • Vars
        • K(e);S_FLIGHT::B(G)
      • Refutation
        • P(g);XR(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • S(f);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(e);S_FLIGHT::B(G)
      • S(a);SBLOCK::S(C)
      • S(f);SBLOCK::S(F)
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