MESON Chess Problem Database

Problem Display
PID: 235330 (1r1Q4/4p1B1/2R1N1N1/1r3knB/3Pp1pK/b3qpp1/8/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Schach-Aktiv, 1999

1r1Q4/4p1B1/2R1N1N1/1r3knB/3Pp1pK/b3qpp1/8/8

#2

8 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Sxd4#
    • 1...Rb1
      • 2.Qd5#
    • 1...Rb2
      • 2.Qd5#
    • 1...Rb3
      • 2.Qd5#
    • 1...Rb4
      • 2.Sxe7#
      • 2.Qd5#
    • 1...Rc5
      • 2.Sxe7#
    • 1...Rd5
      • 2.Qxd5#
    • 1...R5b6
      • 2.Qd5#
    • 1...R5b7
      • 2.Qd5#
    • 1...Bc1
      • 2.Sxe7#
    • 1...Bb2
      • 2.Sxe7#
    • 1...Bc5
      • 2.Qd5#
  • Tries
    • 1.Sgf8?
      • threat
        • 2.Bxg4#
        • 2.Bg6#
      • 1...Qf4
        • 2.Bg6#
      • 1...Sxe6!
    • 1.Sh8?
      • threat
        • 2.Bxg4#
        • 2.Bg6#
      • 1...Bd6
        • 2.Bxg4#
      • 1...Qf4
        • 2.Bg6#
      • 1...Sxe6!
    • 1.Rc5+?
      • 1...Kxe6
        • 2.Sf8#
        • 2.Qxe7#
        • 2.Qd5#
      • 1...Bxc5
        • 2.Qd5#
      • 1...Rxc5!
    • 1.Qf8+?
      • 1...Sf7
        • 2.Qxf7#
      • 1...Rxf8!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Bxg4#
      • 1...Qf4
        • 2.Sxe7#
      • 1...Se6
        • 2.Qd5#
      • 1...e6
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • Q(b);XP(A)::S(E),XQ(b)
    • R(g);N_GUARD::QAR2(H)
    • R(g);S_CUTB(a)::S(F),XP(j)
    • R(g);N_GUARD::QAR2(H),XR(g)
    • B(a);N_GUARD::S(F),XP(j)
    • B(a);S_CUTR(g)::QAR2(H)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::B(C)
      • Refutation
        • S(i);XS(E)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • B(a);::B(C),XP(f)
        • Q(b);::B(C)
      • Refutation
        • S(i);XS(E)
    • Try
      • R(D);CHECK
      • Vars
        • B(a);XR(D)::QAR2(H)
      • Refutation
        • R(g);XR(D)
    • Try
      • Q(H);CHECK
      • Vars
        • S(i);N_GUARD,P_SPINS(i)::QAR2(H),XS(i)
      • Refutation
        • R(k);XQ(H)
  • Actual
    • S(E);
    • Threat
      • B(C),XP(f)
    • Vars
      • Q(b);SBLOCK::S(F),XP(j)
      • S(i);S_CUTP(j)::QAR2(H)
      • P(j);OGATE::QAR1(H)
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