MESON Chess Problem Database

Problem Display
PID: 246414 (4rb2/p7/K1Q3n1/RNp1k2N/6P1/2PP4/4rqn1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Sjakk-Nytt, 1948

4rb2/p7/K1Q3n1/RNp1k2N/6P1/2PP4/4rqn1/8

#2

8 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qe4#
    • 1...Rb2
      • 2.Qe4#
    • 1...Rc2
      • 2.Qe4#
    • 1...Rd2
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Re7
      • 2.Qd6#
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bh6
      • 2.Qd6#
    • 1...Bg7
      • 2.Qd6#
    • 1...Se3
      • 2.Qe4#
    • 1...Se7
      • 2.Qd6#
  • Tries
    • 1.Qf6+?
      • 1...Kd5
        • 2.Sc7#
        • 2.c4#
      • 1...Qxf6+!
  • Keys
    • 1.Sc7!
      • threat
        • 2.Qd5#
      • 1...Qd4
        • 2.Qf6#
      • 1...Qf3
        • 2.d4#
      • 1...Qf6
        • 2.Qxf6#
        • 2.d4#
      • 1...Qf7
        • 2.d4#
      • 1...Re6
        • 2.Qxe6#
      • 1...Rd8
        • 2.Qe6#
      • 1...Se3
        • 2.d4#
      • 1...S2f4
        • 2.Qf6#
      • 1...S6f4
        • 2.Qf6#
      • 1...Se7
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 9
  • Sets
    • R(a);N_GUARD,P_PINR(D)::QAR1(H)
    • R(a);N_GUARD::QAR1(H)
    • R(a);N_GUARD::QAR1(H),XR(a)
    • R(h);S_CUTB(i)::QAB1(H)
    • B(i);N_GUARD::QAB1(H),XB(i)
    • B(i);N_GUARD::QAB1(H)
    • S(c);S_CUTR(a)::QAR1(H)
    • S(f);S_CUTB(i)::QAB1(H)
  • Tries
    • Try
      • Q(H);CHECK
      • Refutation
        • Q(b);CHECK,XQ(H)
  • Actual
    • S(E);P_PINP(d)
    • Threat
      • QAR1(H)
    • Vars
      • Q(b);N_GUARD::QAB1(H)
      • Q(b);N_GUARD::P(B)
      • R(h);N_GUARD,P_PINQ(H)::QAR1(H),XR(h)
      • R(h);N_GUARD::QAR1(H)
      • S(c);S_CUTQ(b)::P(B)
      • S(c);S_CUTQ(b)::QAB1(H)
      • S(f);S_CUTQ(b)::QAB1(H)
      • S(f);S_CUTR(h)::QAR1(H)
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