MESON Chess Problem Database

Problem Display
PID: 240570 (n7/p2P3K/k7/N2P4/2P1N3/R7/1p6/6B1 w - - 0 1)

Cheylan, Yves

Thema Danicum, 1979

n7/p2P3K/k7/N2P4/2P1N3/R7/1p6/6B1

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb6
      • 2.Sc5#
  • Tries
    • 1.d8Q?
      • threat
        • 2.Sc5#
        • 2.Qc8#
      • 1...b1B
        • 2.Qc8#
      • 1...b1R
        • 2.Sc5#
      • 1...Sb6
        • 2.Sc5#
      • 1...Sc7
        • 2.Qd6#
        • 2.Qc8#
      • 1...b1Q!
    • 1.d8S?
      • threat
        • 2.Sb3#
        • 2.Sac6#
        • 2.Sab7#
      • 1...Sb6
        • 2.Sc5#
      • 1...b1S!
  • Keys
    • 1.Sc6+!
      • 1...Kb7
        • 2.Rxa7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(d);SBLOCK::S(D)
  • Tries
    • Try
      • P(G);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);P_PINS(D)::QAB(G)
        • P(a);::S(D)
        • S(d);::S(D)
      • Refutation
        • P(a);P_PINS(D)
    • Try
      • P(G);
      • Threat
        • DUALS(3)
      • Vars
        • S(d);SBLOCK::S(D)
      • Refutation
        • P(a);
  • Actual
    • S(E);CHECK
    • Vars
      • K(b);OGATE,S_FLIGHT::R1(B),XP(c)
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