MESON Chess Problem Database

Problem Display
PID: 174426 (2br4/4P3/2R2PN1/2P1N1p1/2P1k1p1/3p2Q1/2nP1nP1/2K2RB1 w - - 0 1)

Avner, Uri

Variantim, 1992

2br4/4P3/2R2PN1/2P1N1p1/2P1k1p1/3p2Q1/2nP1nP1/2K2RB1

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qxd3#
    • 1...Kf5
      • 2.Qxg4#
  • Tries
    • 1.Qe3+?
      • 1...Kf5
        • 2.Rxf2#
      • 1...Sxe3!
    • 1.Qf3+?
      • 1...Kd4
        • 2.Qxd3#
      • 1...gxf3!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qxg4#
      • 1...Kf5
        • 2.Qxd3#

There are these versions: 174425, 174427

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(d);P-FLIGHT,P_SPINS(b)::QAR1(F),XP(c)
    • K(d);P_SPINS(b),S_FLIGHT::QAB1(F),XP(e)
  • Tries
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P_SPINS(b),S_FLIGHT::R(B),XS(b)
      • Refutation
        • S(a);XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINS(b)::QAR1(F),XP(c)
      • Refutation
        • P(e);XQ(F)
  • Actual
    • S(I);
    • Threat
      • QAR1(F)
    • Vars
      • K(d);P-FLIGHT,P_SPINS(b)::QAR(F),XP(e)
      • K(d);P_SPINS(b),S_FLIGHT::QAB(F),XP(c)
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