MESON Chess Problem Database

Problem Display
PID: 117289 (8/N3PrpK/2p3Q1/R1Nrk3/q2n1p2/1p2P1Pb/1n4p1/BBb5 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1993

8/N3PrpK/2p3Q1/R1Nrk3/q2n1p2/1p2P1Pb/1n4p1/BBb5

#2

10 + 13

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Rxc5#
    • 1...Rd6
      • 2.Sd3#
      • 2.Sd7#
    • 1...Rd7
      • 2.Sd3#
      • 2.Sxd7#
    • 1...Rd8
      • 2.Sd3#
      • 2.Sd7#
    • 1...Rf5
      • 2.Sd7#
    • 1...Rxe7
      • 2.gxf4#
    • 1...Bf5
      • 2.gxf4#
    • 1...Bd7
      • 2.Sxd7#
    • 1...Sd1
      • 2.Sd3#
    • 1...Sd3
      • 2.Sxd3#
    • 1...Sc4
      • 2.Sd3#
    • 1...Sc2
      • 2.Sd3#
    • 1...Se2
      • 2.Sd3#
    • 1...Sf3
      • 2.Sd3#
    • 1...Sb5
      • 2.Sxc6#
    • 1...Sf5
      • 2.Sd7#
      • 2.Qe6#
  • Tries
    • 1.Sxc6+?
      • 1...Sxc6
        • 2.Sd3#
      • 1...Qxc6!
    • 1.Qe4+?
      • 1...Kd6
        • 2.e8S#
      • 1...Kf6!
    • 1.exd4+?
      • 1...Qxd4
        • 2.Sxc6#
      • 1...Rxd4
        • 2.Sd3#
        • 2.Sd7#
      • 1...Kxd4!
  • Keys
    • 1.e8S!
      • threat
        • 2.Qe4#
      • 1...Rf5
        • 2.Sd7#
      • 1...Bf5
        • 2.gxf4#
      • 1...Sc2
        • 2.Sd3#
      • 1...Se2
        • 2.Sd3#
      • 1...Sf3
        • 2.Sd3#
      • 1...Sb5
        • 2.Sxc6#
      • 1...Sf5
        • 2.Qe6#
      • 1...Se6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(i);OGATE,P_SPINR(i),XS(F)::R(E),XR(i)
    • R(l);S_CUTB(e)::S(F)
    • R(l);N_GUARD,XP(I)::P(D),XP(h)
    • B(e);P_PINQ(G),S_CUTR(l)::P(D),XP(h)
    • B(e);N_GUARD::S(F),XB(e)
    • S(b);N_GUARD,P_SPINS(g)::S(F)
    • S(b);N_GUARD,P_SPINS(g)::S(F),XS(b)
    • S(g);P_SPINS(b)::S(F)
    • S(g);N_GUARD,P_SPINS(b),S_CUTQ(f)::S(H),XP(k)
  • Tries
    • Try
      • S(H);CHECK,XP(k)
      • Vars
        • S(g);P_SPINS(b),XS(H)::S(F)
      • Refutation
        • Q(f);XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • K(j);S_FLIGHT::P=S
      • Refutation
        • K(j);S_FLIGHT
    • Try
      • P(C);CHECK,XS(g)
      • Vars
        • Q(f);XP(C)::S(H),XP(k)
      • Refutation
        • K(j);P_SPINS(b),S_FLIGHT,XP(C)
  • Actual
    • P(I);
    • Threat
      • QAR1(G)
    • Vars
      • R(l);N_GUARD,S_CUTB(e)::S(F)
      • B(e);P_PINQ(G),S_CUTR(l)::P(D),XP(h)
      • S(g);P_SPINS(b)::S(F)
      • S(g);N_GUARD,P_SPINS(b),S_CUTQ(f)::S(H),XP(k)
      • S(g);N_GUARD,P_SPINS(b),S_CUTB(e)::QAR1(G)
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