MESON Chess Problem Database

Problem Display
PID: 108781 (3R3n/K1p3r1/2Qbk1b1/2P2rP1/2P1NpB1/8/8/3R4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1985

3R3n/K1p3r1/2Qbk1b1/2P2rP1/2P1NpB1/8/8/3R4

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Qd5#
    • 1...Ke7
      • 2.Qd7#
    • 1...Kf7
      • 2.Qe8#
    • 1...Re7
      • 2.Qd5#
    • 1...Sf7
      • 2.Re8#
  • Tries
    • 1.Sxd6?
      • threat
        • 2.Re1#
        • 2.Qe4#
      • 1...Ke5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Ke7
        • 2.Qd7#
      • 1...Sf7
        • 2.Re8#
        • 2.Qe8#
      • 1...cxd6+!
    • 1.R1xd6+?
      • 1...Ke5
        • 2.Re6#
        • 2.Qd5#
      • 1...Ke7
        • 2.R6d7#
        • 2.Qd7#
        • 2.Qxc7#
      • 1...Kf7
        • 2.R6d7#
        • 2.Qd7#
        • 2.Qe8#
        • 2.Qxc7#
      • 1...cxd6+!
    • 1.Qxd6+?
      • 1...Kf7
        • 2.Rf8#
        • 2.Qd7#
      • 1...cxd6+!
    • 1.cxd6?
      • threat
        • 2.Qd5#
      • 1...Ke5
        • 2.Qd5#
      • 1...Kf7
        • 2.Qd7#
        • 2.Qe8#
      • 1...cxd6+!
  • Keys
    • 1.Re1!
      • threat
        • 2.Sxd6#
      • 1...Ke5
        • 2.Qd5#
      • 1...Ke7
        • 2.Qd7#
      • 1...Kf7
        • 2.Qe8#
      • 1...Sf7
        • 2.Re8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • K(d);N_SPINB(c),N_SPINR(b),P-FLIGHT::QAR1(G)
    • K(d);N_SPINB(c),N_SPINR(b),S_FLIGHT::QAB1(G)
    • R(g);SBLOCK::QAB1(G)
    • S(h);SBLOCK,S_CUTB(e),S_CUTR(g)::R(I)
  • Tries
    • Try
      • S(C);XB(c)
      • Threat
        • DUALS(2)
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT::QAR1(G)
      • Refutation
        • P(f);CHECK,P_SPINP(f),XS(C)
    • Try
      • R(A);CHECK,XB(c)
      • Refutation
        • P(f);CHECK,P_SPINP(f),XR(A)
    • Try
      • Q(G);CHECK,XB(c)
      • Refutation
        • P(f);CHECK,XQ(G)
    • Try
      • P(E);XB(c)
      • Threat
        • QAB1(G)
      • Vars
        • K(d);N_SPINR(b),P-FLIGHT::QAR1(G)
      • Refutation
        • P(f);CHECK,P_SPINP(f),XP(E)
  • Actual
    • R(A);
    • Threat
      • R(A)+S(C),XB(c)
    • Vars
      • K(d);N_SPINB(c),N_SPINR(b),P-FLIGHT::QAR1(G)
      • K(d);N_SPINB(c),N_SPINR(b),S_FLIGHT::QAB1(G)
      • S(h);SBLOCK,S_CUTB(e),S_CUTR(g)::R(I)
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