MESON Chess Problem Database

Problem Display
PID: 155730 (4RQK1/2p5/8/1bRp3n/Nr1kBP2/4p3/8/4b3 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Problemskak, 2008

4RQK1/2p5/8/1bRp3n/Nr1kBP2/4p3/8/4b3

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4
      • 2.Rxd5#
    • 1...Sg3
      • 2.Qg7#
      • 2.Qf6#
    • 1...Sxf4
      • 2.Qg7#
      • 2.Qf6#
    • 1...Sf6+
      • 2.Qxf6#
    • 1...Sg7
      • 2.Qxg7#
      • 2.Qf6#
  • Tries
    • 1.Rc6?
      • threat
        • 2.Qc5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...dxe4
        • 2.Rd8#
      • 1...Rc4!
    • 1.Qg7+?
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Sxg7!
    • 1.Qf5?
      • threat
        • 2.Qxd5#
        • 2.Qe5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Rxa4
        • 2.Qxd5#
      • 1...Bxa4
        • 2.Qxd5#
      • 1...Sxf4
        • 2.Qe5#
        • 2.Qf6#
      • 1...dxe4
        • 2.Qxe4#
        • 2.Qd5#
      • 1...Bc4
        • 2.Qe5#
      • 1...Bc6
        • 2.Qe5#
      • 1...c6
        • 2.Qe5#
      • 1...e2!
  • Keys
    • 1.Rc3!
      • threat
        • 2.Qc5#
      • 1...Sf6+
        • 2.Qxf6#
      • 1...Bxe8
        • 2.Qxb4#
      • 1...Rc4
        • 2.Rd3#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::R1(D),XP(f)
    • S(g);CHECK,N_GUARD::QAB(F),XS(g)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAB1(F)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(F),XS(g)
        • P(f);OGATEB,SBLOCK,XB(B)::R(E)
      • Refutation
        • R(c);
    • Try
      • Q(F);CHECK
      • Vars
        • S(g);CHECK,N_GUARD,P_SPINS(g)::QAB(F),XS(g)
      • Refutation
        • S(g);XQ(F)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • S(g);CHECK,N_GUARD::QAB(F),XS(g)
        • R(c);XS(A)::QAR1(F),XP(f)
        • B(e);XS(A)::QAR1(F),XP(f)
        • B(e);::QAB1(F)
        • P(h);::QAB1(F)
      • Refutation
        • P(b);
  • Actual
    • R(D);
    • Threat
      • QAB1(F)
    • Vars
      • S(g);CHECK,N_GUARD::QAB(F),XS(g)
      • B(e);N_GUARD,XR(E)::QAR2(F),XR(c)
      • R(c);SBLOCK,S_CUTB(e)::R1(D)
      • P(h);::QAB1(F),XP(h)
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