MESON Chess Problem Database

Problem Display
PID: 233982 (1K1Qb3/4pr1q/3np3/3kb1Rr/1P1N4/1P1R1n2/3N2B1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Skakbladet, 0000

1K1Qb3/4pr1q/3np3/3kb1Rr/1P1N4/1P1R1n2/3N2B1/8

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.S4xf3+?
      • 1...Kc6
        • 2.Sd4#
      • 1...Qxd3!
    • 1.Sb5+?
      • 1...Kc6
        • 2.Sa7#
      • 1...Qxd3!
    • 1.Sf5+?
      • 1...Bd4
        • 2.Sxe7#
      • 1...Kc6!
    • 1.Bxf3+?
      • 1...Qe4
        • 2.Bxe4#
      • 1...Rxf3!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qc5#
      • 1...Bc6
        • 2.Qxc6#
      • 1...Sc4
        • 2.bxc4#
      • 1...Se4
        • 2.S4xf3#
      • 1...Sb5
        • 2.Qxe5#
      • 1...Sf5
        • 2.Bxf3#
      • 1...Sb7
        • 2.Qxe5#
      • 1...Sc8
        • 2.Qxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);CHECK,P_PINS(e),XS(a)
      • Vars
        • K(b);N_SPINB(c),N_SPINS(e),S_FLIGHT::B(B)+S(F),DCHECK
      • Refutation
        • Q(i);XR(D)
    • Try
      • S(F);CHECK
      • Vars
        • K(b);N_SPINB(c),S_FLIGHT::S(F)
      • Refutation
        • Q(i);XR(D)
    • Try
      • S(F);CHECK,N_PINB(c)
      • Vars
        • B(c);P_SPINB(c)::R(G)+S(F),DCHECK,XP(g)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(B);CHECK,P_PINS(e),XS(a)
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::B(B),XQ(i)
      • Refutation
        • R(h);XB(B)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • B(j);N_GUARD::QAB1(I),XB(j)
      • S(e);OGATE,P_PINQ(I)::P(C),XS(e)
      • S(e);N_SPINS(a),P_PINQ(I),S_CUTQ(i)::R(D)+S(F),XS(a)
      • S(e);OGATE,P_PINQ(I)::QAR1(I),XB(c)
      • S(e);N_GUARD,N_SPINB(c),P_PINQ(I),S_CUTQ(i),S_CUTR(h)::B(B),XS(a)
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