MESON Chess Problem Database

Problem Display
PID: 168215 (2R5/6p1/2np4/3k1P2/1bp3pR/2p2PB1/6NK/6QB w - - 0 1)

Petite, Efren

Sakkelet, 1994

2R5/6p1/2np4/3k1P2/1bp3pR/2p2PB1/6NK/6QB

#2

9 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sd4
      • 2.Se3#
    • 1...Sa5
      • 2.Qd1#
    • 1...Se5
      • 2.Sf4#
    • 1...Sa7
      • 2.Qd1#
    • 1...Se7
      • 2.Qd1#
    • 1...Sb8
      • 2.Qd1#
    • 1...Sd8
      • 2.Qd1#
  • Tries
    • 1.Qd4+?
      • 1...Sxd4
        • 2.Se3#
      • 1...Kxd4!
    • 1.Qd1+?
      • 1...Sd4
        • 2.Se3#
      • 1...Kc5!
  • Keys
    • 1.fxg4!
      • threat
        • 2.Se1#
      • 1...Ke4
        • 2.Se1#
      • 1...Sd4
        • 2.Se3#
      • 1...Se5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • S(f);SBLOCK::S(C)
    • S(f);N_GUARD::QAR(A)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);SBLOCK,XQ(A)::S(C)
      • Refutation
        • K(e);P-FLIGHT,P_SPINP(d),XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • S(f);P_SPINS(f)::S(C)
      • Refutation
        • K(e);P-FLIGHT,P_SPINS(f)
  • Actual
    • P(E);XP(d)
    • Threat
      • B(B)+S(C)
    • Vars
      • K(e);S_FLIGHT::B(B)+S(C)
      • S(f);SBLOCK::B(B)+S(C),DCHECK
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