MESON Chess Problem Database

Problem Display
PID: 233961 (2Rb2b1/BN1p1Q2/p1q4r/3n2Rp/2k5/Pp6/3PP3/7K w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

2nd HM., Skakbladet, 1984

2Rb2b1/BN1p1Q2/p1q4r/3n2Rp/2k5/Pp6/3PP3/7K

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sxd6#
    • 1...Rh7
      • 2.Sd6#
    • 1...Rh8
      • 2.Sd6#
    • 1...Bf6
      • 2.Sd6#
    • 1...Bh7
      • 2.Qxd5#
  • Tries
    • 1.Rg4+?
      • 1...Kb5
        • 2.a4#
      • 1...hxg4+!
    • 1.Qf4+?
      • 1...Kb5
        • 2.Qb4#
        • 2.a4#
      • 1...Sxf4+!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Qd3#
      • 1...Kb5
        • 2.Qxb3#
      • 1...Bh7
        • 2.Qxd5#
      • 1...Sc3
        • 2.d3#
      • 1...Se3
        • 2.Qe4#
      • 1...Sb4
        • 2.Qe4#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sb6
        • 2.Qe4#
      • 1...Sf6
        • 2.Sd6#
      • 1...Sc7
        • 2.Sa5#
      • 1...Se7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD::S(G),XR(g)
    • R(g);N_GUARD::S(G)
    • B(i);S_CUTR(g)::S(G)
    • B(j);N_GUARD::QAB1(H),XS(c)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(b);N_SPINQ(f),N_SPINS(c),S_FLIGHT::P(D)
      • Refutation
        • P(d);CHECK,XR(E)
    • Try
      • Q(H);CHECK,N_PINS(c)
      • Refutation
        • S(c);CHECK,XQ(H)
  • Actual
    • Q(H);N_PINS(c)
    • Threat
      • QAB1(H)
    • Vars
      • K(b);N_SPINQ(f),P_SPINS(c),S_FLIGHT::QAR2(H),XP(a)
      • B(j);N_GUARD::QAB1(H),XS(c)
      • S(c);P_PINQ(H),SBLOCK::P(B)
      • S(c);P_PINQ(H)::QAR2(H)
      • S(c);P_PINQ(H),S_CUTR(g)::S(G)
      • S(c);N_SPINQ(f),P_PINQ(H),S_CUTB(i)::S(G)
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