MESON Chess Problem Database

Problem Display
PID: 240660 (8/2Kp2Nq/3R3b/2p1k1p1/1p2n3/1p2Q3/6rN/2Bb1Rn1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1984

8/2Kp2Nq/3R3b/2p1k1p1/1p2n3/1p2Q3/6rN/2Bb1Rn1

#2

7 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qg8
      • 2.Rf5#
    • 1...Qh8
      • 2.Rf5#
    • 1...Rb2
      • 2.Bxb2#
    • 1...Re2
      • 2.Sg4#
    • 1...Rg3
      • 2.Bb2#
    • 1...Rg4
      • 2.Bb2#
    • 1...Bc2
      • 2.Bb2#
    • 1...Be2
      • 2.Bb2#
    • 1...Se2
      • 2.Sf3#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Sg4+?
      • 1...Rxg4
        • 2.Bb2#
      • 1...Bxg4!
    • 1.Rfxd1?
      • threat
        • 2.R1d5#
      • 1...Rd2
        • 2.Sg4#
      • 1...Qg8!
    • 1.Re6+?
      • 1...Kd5
        • 2.Qd3#
      • 1...dxe6!
  • Keys
    • 1.Re1!
      • threat
        • 2.Qxc5#
      • 1...Qg8
        • 2.Qxe4#
      • 1...Rc2
        • 2.Qg3#
      • 1...Rd2
        • 2.Qg3#
      • 1...Re2
        • 2.Sg4#
      • 1...Be2
        • 2.Bb2#
      • 1...Se2
        • 2.Sf3#
      • 1...c4
        • 2.Qd4#
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(l);N_GUARD::R1(B),XQ(l)
    • Q(l);N_GUARD::R1(B)
    • R(c);N_GUARD::B(A),XR(c)
    • R(c);N_GUARD,S_CUTB(a)::S(C)
    • R(c);N_GUARD::B(A)
    • B(a);S_CUTR(c)::B(A)
    • S(b);N_GUARD,S_CUTB(a)::S(C)
    • P(g);N_GUARD::QAB1(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(c);XS(C)::B(A)
      • Refutation
        • B(a);XS(C)
    • Try
      • R(B);XB(a)
      • Threat
        • R1(B)
      • Vars
        • R(c);N_GUARD::S(C)
      • Refutation
        • Q(l);
    • Try
      • R(E);CHECK
      • Vars
        • K(h);N_SPINS(f),P-FLIGHT::QAR2(D)
      • Refutation
        • P(k);P_PINS(G),XR(E)
  • Actual
    • R(B);
    • Threat
      • QAR2(D),XP(g)
    • Vars
      • Q(l);N_GUARD::QAR1(D),XS(f)
      • R(c);N_GUARD::QAB(D)
      • R(c);N_GUARD,S_CUTB(a)::S(C)
      • B(a);S_CUTR(c)::B(A)
      • S(b);N_GUARD,S_CUTB(a)::S(C)
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