MESON Chess Problem Database

Problem Display
PID: 15497 (bB4R1/pk1p4/p1N1R3/P1p5/2N3Q1/3r4/3p4/3K4 w - - 0 1)

Froberg, Johan Hilding Laurentius

Springaren, 1984

bB4R1/pk1p4/p1N1R3/P1p5/2N3Q1/3r4/3p4/3K4

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...d5
      • 2.Qg7#
  • Tries
    • 1.Sxa7?
      • threat
        • 2.Rb6#
      • 1...Rb3
        • 2.Sd6#
      • 1...Rd6
        • 2.Sxd6#
      • 1...d6
        • 2.Re7#
        • 2.Qg7#
      • 1...dxe6!
    • 1.Rd6?
      • threat
        • 2.Qxd7#
      • 1...dxc6
        • 2.Qd7#
        • 2.Qc8#
        • 2.Qg7#
      • 1...Rxd6!
  • Keys
    • 1.Qe4!
      • 1...dxc6
        • 2.Qxc6#
      • 1...dxe6
        • 2.Sd4#
      • 1...Rd4
        • 2.Qb1#
      • 1...Ra3
        • 2.Sd6#
      • 1...Rb3
        • 2.Sd6#
      • 1...Rc3
        • 2.Sd6#
      • 1...Re3
        • 2.Sd6#
      • 1...Rf3
        • 2.Sd6#
      • 1...Rg3
        • 2.Sd6#
      • 1...Rh3
        • 2.Sd6#
      • 1...Rd5
        • 2.Qb1#
      • 1...Rd6
        • 2.Sxd6#
      • 1...d5
        • 2.Qh7#
      • 1...d6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • P(g);OGATEB::QAR(C)
  • Tries
    • Try
      • S(E);XP(e)
      • Threat
        • R1(F)
      • Vars
        • R(b);N_GUARD::S(B)
        • R(b);N_GUARD::S(B),XR(b)
      • Refutation
        • P(g);XR(F)
    • Try
      • R(F);
      • Threat
        • QAR2(C),XP(g)
      • Refutation
        • R(b);XR(F)
  • Actual
    • Q(C);
    • Vars
      • P(g);OGATE,P_SPINP(g),XS(E)::QAB1(C),XP(g)
      • P(g);N_GUARD,XR(F)::QAB(C)+S(E)
      • R(b);OGATE::QAR(C)
      • R(b);N_GUARD::S(B)
      • R(b);N_GUARD::S(B),XR(b)
      • P(g);OGATEB::QAR(C)
      • P(g);OGATEB::R(F)
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