MESON Chess Problem Database

Problem Display
PID: 134136 (3N3b/2p4r/6R1/2Pk2PQ/NR2pP2/1nB5/2Pp2K1/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Sachsische Zeitung, 1999

3N3b/2p4r/6R1/2Pk2PQ/NR2pP2/1nB5/2Pp2K1/8

#2

11 + 7

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...e3
      • 2.Qf3#
    • 1...c6
      • 2.Rd6#
  • Tries
    • 1.Sb6+?
      • 1...Kxc5
        • 2.Sb7#
        • 2.Rc6#
      • 1...cxb6!
    • 1.Bd4?
      • threat
        • 2.Sc3#
      • 1...Bxd4
        • 2.c4#
      • 1...Sxd4
        • 2.c4#
      • 1...d1S!
    • 1.Be5?
      • threat
        • 2.c4#
      • 1...Sa5
        • 2.Rd4#
      • 1...e3
        • 2.Qf3#
      • 1...Bxe5!
    • 1.Bf6?
      • threat
        • 2.c4#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Sa5
        • 2.Rd4#
      • 1...e3
        • 2.Qf3#
      • 1...Bxf6!
    • 1.Qe2?
      • threat
        • 2.Qc4#
        • 2.Qxe4#
      • 1...Sxc5
        • 2.Qc4#
      • 1...Re7
        • 2.Qc4#
      • 1...Bd4
        • 2.Qc4#
      • 1...Sd4
        • 2.Qc4#
      • 1...Sa5
        • 2.Qxe4#
      • 1...e3
        • 2.Qf3#
        • 2.Qc4#
      • 1...Rh2+!
    • 1.Qxh7?
      • threat
        • 2.Qg8#
        • 2.Qd7#
        • 2.Qf7#
      • 1...Be5
        • 2.Qg8#
        • 2.Qf7#
      • 1...Bg7
        • 2.Qg8#
      • 1...Sd4
        • 2.Qd7#
      • 1...Sxc5!
  • Keys
    • 1.Rg7!
      • threat
        • 2.Qf7#
      • 1...Rxh5
        • 2.Rd7#
      • 1...Rxg7
        • 2.g6#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Rh6
        • 2.gxh6#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • P(c);OGATEB::QAB(I)
    • P(e);N_GUARD::R1(J)
  • Tries
    • Try
      • S(D);CHECK
      • Refutation
        • P(e);XS(D)
    • Try
      • B(C);
      • Threat
        • S(D)
      • Vars
        • B(g);SBLOCK,XB(C)::P(A)
        • S(b);SBLOCK,XB(C)::P(A)
      • Refutation
        • P(a);
    • Try
      • B(C);
      • Threat
        • P(A)
      • Vars
        • S(b);N_GUARD::R1(E)
        • P(c);OGATEB::QAB(I)
      • Refutation
        • B(g);XB(C)
    • Try
      • B(C);
      • Threat
        • P(A)
      • Vars
        • S(b);N_GUARD,XP(G)::R1(E)
        • S(b);N_GUARD::R1(E)
        • P(c);OGATEB::QAB(I)
      • Refutation
        • B(g);XB(C)
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(G)::QAB1(I)
        • R(f);::QAB1(I)
        • B(g);::QAB1(I)
        • S(b);::QAB1(I)
        • S(b);::QAB1(I),XP(c)
      • Refutation
        • R(f);CHECK
    • Try
      • Q(I);XR(f)
      • Threat
        • DUALS(3)
      • Vars
        • B(g);::QAB(I)
        • S(b);::QAR2(I)
      • Refutation
        • S(b);XP(G)
  • Actual
    • R(J);
    • Threat
      • QAB(I)
    • Vars
      • R(f);N_GUARD,XQ(I)::R(J)
      • R(f);N_GUARD,P_PINP(H),XR(J)::QAR(I)+P(H)
      • S(b);N_GUARD,XP(G)::R1(E)
      • R(f);OGATE::QAR(I)+P(H),XR(f)
      • S(b);N_GUARD::R1(E),XS(b)
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