MESON Chess Problem Database

Problem Display
PID: 240674 (2R3N1/q3PRK1/2nk1p2/5P2/1nPb4/3QP3/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1985

2R3N1/q3PRK1/2nk1p2/5P2/1nPb4/3QP3/8/8

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qxd4#
    • 1...Se5
      • 2.e8S#
  • Tries
    • 1.e8S+?
      • 1...Kc5
        • 2.Qxd4#
      • 1...Ke5!
  • Keys
    • 1.Rxf6+!
      • 1...Kc5
        • 2.Qxd4#
      • 1...Ke5
        • 2.Re6#
      • 1...Kd7
        • 2.e8Q#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINB(b),P_SPINS(c),S_FLIGHT::QAB1(A),XB(b)
    • S(c);SBLOCK::P=S
  • Tries
    • Try
      • P(E);CHECK,P_SPINR(F)
      • Vars
        • K(d);N_SPINB(b),P_SPINS(c),S_FLIGHT::QAB1(A),XB(b)
      • Refutation
        • K(d);N_SPINB(b),S_FLIGHT
  • Actual
    • R(F);CHECK,P_SPINP(E),P_SPINR(F),XP(e)
    • Vars
      • K(d);N_SPINB(b),P_SPINS(c),S_FLIGHT::QAB1(A),XB(b)
      • K(d);N_PINR(F),N_SPINB(b),S_FLIGHT::R1(F)
      • K(d);N_PINP(E),P-FLIGHT::P=Q
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