MESON Chess Problem Database

Problem Display
PID: 262443 (8/4nN2/2Q2P1P/2K2kBB/7P/5p2/5P2/8 w - - 0 1)

Touvron, Fabrice

Europe Echecs, 1983

8/4nN2/2Q2P1P/2K2kBB/7P/5p2/5P2/8

#2

9 + 3

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Kd4?
      • threat
        • 2.Qe4#
        • 2.Qd7#
      • 1...Sd5
        • 2.Qxd5#
        • 2.Qd7#
        • 2.Qc8#
      • 1...Sxc6+!
    • 1.Sd6+?
      • 1...Ke5
        • 2.Qe4#
      • 1...Ke6!
    • 1.Sd8?
      • threat
        • 2.Qe6#
      • 1...Ke5
        • 2.Qe6#
      • 1...Sxc6!
  • Keys
    • 1.Qe8!
      • 1...Ke4
        • 2.Bg6#
      • 1...Ke6
        • 2.Bg4#
      • 1...Sg6
        • 2.Sd6#
      • 1...Sd5
        • 2.Sd6#
        • 2.Qe5#
      • 1...Sc6
        • 2.Sd6#
      • 1...Sc8
        • 2.Qe5#
      • 1...Sg8
        • 2.Sd6#
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • S(c);N_GUARD::QAR2(F),XS(c)
    • S(c);N_GUARD::QAR2(F)
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Threat
        • DUALS(2)
      • Refutation
        • S(c);CHECK,XQ(F)
    • Try
      • S(I);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(I);
      • Threat
        • QAB1(F)
      • Vars
        • K(b);P-FLIGHT::QAR1(F)
      • Refutation
        • S(c);XQ(F)
  • Actual
    • Q(F);
    • Vars
      • K(b);N_GUARD,P_SPINS(c),S_FLIGHT::B(E)
      • S(c);::S(I)
      • S(c);OGATE::QAR1(F)
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