MESON Chess Problem Database

Problem Display
PID: 166180 (2B4B/6n1/1pQ1r1R1/1Rn3bp/5k2/3PN3/2N4K/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Stella Polaris, 1966

2B4B/6n1/1pQ1r1R1/1Rn3bp/5k2/3PN3/2N4K/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sg2#
  • Tries
    • 1.Qf3+?
      • 1...Ke5
        • 2.Sc4#
        • 2.Rxe6#
      • 1...Kxf3!
  • Keys
    • 1.Sg2+!
      • 1...Kg4
        • 2.Sce3#
      • 1...Ke5
        • 2.Qxe6#
      • 1...Kf5
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::S(D)
  • Tries
    • Try
      • Q(F);CHECK
      • Refutation
        • K(a);P-FLIGHT,XQ(F)
  • Actual
    • S(D);CHECK
    • Vars
      • K(a);P-FLIGHT,P_SPINB(c),P_SPINR(f)::S(A)
      • K(a);P_SPINS(b),S_FLIGHT::QAR1(F),XR(f)
      • K(a);P-FLIGHT,P_SPINR(f),P_SPINS(b)::QAB1(F)
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