MESON Chess Problem Database

Problem Display
PID: 198615 (1B1rR3/5p2/2N2p2/5k1P/r1n3pP/1Q4K1/5P2/n7 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Problemskak, 2011

1B1rR3/5p2/2N2p2/5k1P/r1n3pP/1Q4K1/5P2/n7

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3+
      • 2.Qxd3#
    • 1...Rd4
      • 2.Sxd4#
    • 1...Rxb8
      • 2.Sd4#
      • 2.Qd3#
    • 1...Rc8
      • 2.Sd4#
      • 2.Qd3#
    • 1...Sd6
      • 2.Qd5#
  • Tries
    • 1.Qc2+?
      • 1...Rd3+
        • 2.Qxd3#
      • 1...Sxc2!
    • 1.Qb1+?
      • 1...Rd3+
        • 2.Qxd3#
      • 1...Sc2!
    • 1.Qb5+?
      • 1...Rd5
        • 2.Sd4#
      • 1...Se5!
  • Keys
    • 1.f3!
      • threat
        • 2.fxg4#
      • 1...Rxe8
        • 2.Sd4#
      • 1...gxf3
        • 2.Qxf3#
      • 1...Rd3
        • 2.Qxd3#
      • 1...Rd4
        • 2.Sxd4#
      • 1...Sb2
        • 2.Se7#
      • 1...Sd2
        • 2.Se7#
      • 1...Sa3
        • 2.Se7#
      • 1...Se3
        • 2.Se7#
      • 1...Sa5
        • 2.Se7#
      • 1...Se5
        • 2.Se7#
      • 1...Sb6
        • 2.Se7#
      • 1...Sd6
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(h);CHECK,N_GUARD::QAB(B),XR(h)
    • R(h);N_GUARD::S(F),XR(h)
    • S(c);OGATE::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • R(h);CHECK,N_GUARD,P_SPINR(h)::QAB(B),XR(h)
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • R(h);CHECK,N_GUARD,P_SPINR(h)::QAB(B),XR(h)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(B);CHECK
      • Vars
        • R(h);P_SPINR(h)::S(F)
      • Refutation
        • S(c);P_SPINS(c)
  • Actual
    • P(A);
    • Threat
      • P(A),XP(d)
    • Vars
      • R(h);N_GUARD,XR(H)::S(F)
      • P(d);OGATE,XP(A)::QAR2(B),XP(d)
      • R(h);N_GUARD,P_PINP(A)::QAB(B),XR(h)
      • R(h);N_GUARD::S(F),XR(h)
      • S(c);::S(F)
      • S(c);OGATE::QAR2(B)
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