MESON Chess Problem Database

Problem Display
PID: 233959 (3R4/b7/p2N2N1/1P3P2/r2k3K/Bq1Pn3/1PQ3p1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

3rd HM., Skakbladet, 1981

3R4/b7/p2N2N1/1P3P2/r2k3K/Bq1Pn3/1PQ3p1/8

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5+
      • 2.Sc4#
      • 2.Se4#
    • 1...Qd5
      • 2.Qc3#
    • 1...Qxb5
      • 2.Sxb5#
    • 1...Sd1
      • 2.Sc4#
    • 1...Sf1
      • 2.Sc4#
    • 1...Sxc2
      • 2.Sc4#
    • 1...Sc4
      • 2.Sxc4#
    • 1...Sg4
      • 2.Sc4#
    • 1...Sxf5+
      • 2.Sxf5#
    • 1...axb5
      • 2.Sxb5#
  • Tries
    • 1.Se4+?
      • 1...Qd5
        • 2.Qc3#
      • 1...Sd5!
    • 1.Sb7+?
      • 1...Qd5
        • 2.Qc3#
      • 1...Sd5!
    • 1.Sf7+?
      • 1...Qd5
        • 2.Qc3#
      • 1...Sd5!
    • 1.Sc8+?
      • 1...Qd5
        • 2.Qc3#
      • 1...Sd5!
    • 1.Se8+?
      • 1...Qd5
        • 2.Qc3#
      • 1...Sd5!
    • 1.Bc5+?
      • 1...Kd5+
        • 2.Se4#
      • 1...Bxc5!
    • 1.Qc3+?
      • 1...Kd5+
        • 2.Sc4#
        • 2.Se4#
      • 1...Qxc3!
  • Keys
    • 1.b6!
      • threat
        • 2.Sb5#
      • 1...Kd5+
        • 2.Se4#
      • 1...Sxf5+
        • 2.Sxf5#
      • 1...Qxd3
        • 2.Qc5#
      • 1...Sxc2
        • 2.Sc4#
      • 1...Sd1
        • 2.Sc4#
      • 1...Sf1
        • 2.Sc4#
      • 1...Sc4
        • 2.Sxc4#
      • 1...Sg4
        • 2.Sc4#
      • 1...Sd5
        • 2.Bc5#
      • 1...Qd5
        • 2.Qc3#
      • 1...Qb5
        • 2.Sxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • Q(b);N_GUARD,SBLOCK::QAB1(B)
    • Q(b);XP(F)::R(J)+S(H),DCHECK,XQ(b)
    • S(c);N_GUARD::R(J)+S(H)
    • S(c);N_GUARD,XQ(B)::R(J)+S(H)
    • S(c);N_GUARD::R(J)+S(H),XS(c)
    • S(c);CHECK,XP(G)::R(J)+S(H),DCHECK,XS(c)
    • P(f);XP(F)::R(J)+S(H),DCHECK,XP(f)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(B)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(B)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(B)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(B)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • S(H);CHECK
      • Vars
        • Q(b);P_SPINQ(b)::QAB1(B)
      • Refutation
        • S(c);P_SPINS(c)
    • Try
      • B(C);CHECK
      • Vars
        • K(e);CHECK,P-FLIGHT::R(J)+S(H)
      • Refutation
        • B(g);XB(C)
    • Try
      • Q(B);CHECK
      • Refutation
        • Q(b);XQ(B)
  • Actual
    • P(F);
    • Threat
      • R(J)+S(H),DCHECK
    • Vars
      • K(e);CHECK,P-FLIGHT::R(J)+S(H)
      • S(c);CHECK,XP(G)::R(J)+S(H),DCHECK,XS(c)
      • Q(b);SBLOCK,XP(D)::QAB1(B)
      • S(c);N_GUARD,XQ(B)::R(J)+S(H)
      • S(c);N_GUARD::R(J)+S(H)
      • S(c);N_GUARD::R(J)+S(H),XS(c)
      • S(c);SBLOCK::B(C)
      • Q(b);N_GUARD,SBLOCK::QAB1(B)
      • Q(b);::R(J)+S(H),DCHECK,XQ(b)
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