MESON Chess Problem Database

Problem Display
PID: 243228 (b2R3Q/3p4/8/2Pk1K2/1br2p2/2pN4/8/3R4 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Tidskrift for Schack, 1980

b2R3Q/3p4/8/2Pk1K2/1br2p2/2pN4/8/3R4

#2

6 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Se5#
    • 1...Bxc5
      • 2.Sb4#
    • 1...Bc6
      • 2.Qe5#
    • 1...d6
      • 2.Rxd6#
  • Tries
    • 1.Rc8?
      • threat
        • 2.Sxb4#
        • 2.Sxf4#
        • 2.Qe5#
      • 1...Rxc5
        • 2.Sb2#
        • 2.Se5#
      • 1...Bxc5
        • 2.Sb4#
        • 2.Sxf4#
        • 2.Qe5#
      • 1...Rd4
        • 2.Qg8#
      • 1...Ba3
        • 2.Sb4#
        • 2.Sxf4#
        • 2.Qe5#
      • 1...Ba5
        • 2.Sb4#
        • 2.Sxf4#
        • 2.Qe5#
      • 1...Bc6
        • 2.Qe5#
      • 1...f3
        • 2.Sxb4#
        • 2.Sf4#
        • 2.Qe5#
      • 1...d6
        • 2.Sxb4#
        • 2.Sxf4#
      • 1...Re4!
    • 1.Qf6?
      • threat
        • 2.Rxd7#
        • 2.Qd6#
      • 1...Rxc5
        • 2.Sb2#
        • 2.Se5#
      • 1...Bxc5
        • 2.Sb4#
        • 2.Sxf4#
      • 1...Rd4
        • 2.Qe6#
      • 1...d6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...Bc6
        • 2.Qe5#
        • 2.Qd6#
      • 1...Re4!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Qxd7#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qxd7#
      • 1...Rxc5
        • 2.Se5#
      • 1...Bxc5
        • 2.Sb4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Rd4
        • 2.Qe6#
      • 1...Bc6
        • 2.Qe5#
      • 1...d6
        • 2.Rxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,SBLOCK,XP(C)::R(A)+S(B)
    • B(b);SBLOCK,XP(C)::R(A)+S(B),DCHECK
    • B(g);SBLOCK::QAR1(F)
    • P(f);OGATE::R1(E),XP(f)
  • Tries
    • Try
      • R(E);N_PINP(f)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);SBLOCK::QAB(F)
        • B(g);::QAR1(F)
      • Refutation
        • R(c);
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);SBLOCK::QAB1(F)
      • Refutation
        • R(c);
  • Actual
    • Q(F);
    • Threat
      • QAR2(F),XP(f)
    • Vars
      • K(e);P-FLIGHT::QAB1(F)
      • K(e);S_FLIGHT::QAB1(F),XP(f)
      • R(c);N_GUARD,SBLOCK,XP(C)::R(A)+S(B)
      • B(b);SBLOCK,XP(C)::R(A)+S(B),DCHECK
      • R(c);N_GUARD::QAB1(F),XR(c)
      • R(c);SBLOCK::QAB1(F)
      • B(g);SBLOCK::QAR1(F)
      • P(f);OGATE::R1(E),XP(f)
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