MESON Chess Problem Database

Problem Display
PID: 160992 (6QB/5pKB/2pp4/N1p1n3/2Pk4/R4P2/1P4N1/1n1r4 w - - 0 1)

Back, Par-Erik

Norsk Sjakkblad, 1937

6QB/5pKB/2pp4/N1p1n3/2Pk4/R4P2/1P4N1/1n1r4

#2

10 + 8

15148 Sadier Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Sc3
      • 2.bxc3#
    • 1...f6
      • 2.Sb3#
  • Tries
    • 1.Kh6?
      • threat
        • 2.Qg4#
      • 1...Re1
        • 2.Rd3#
      • 1...Sd2
        • 2.Rd3#
      • 1...Sc3
        • 2.bxc3#
      • 1...f5
        • 2.Sxc6#
      • 1...f6
        • 2.Sb3#
      • 1...Rh1+!
    • 1.Qxf7?
      • threat
        • 2.Sb3#
        • 2.Qf4#
      • 1...Sxf3
        • 2.Sxc6#
        • 2.Qf4#
      • 1...Sxc4
        • 2.Sxc6#
      • 1...Sxf7
        • 2.Kxf7#
      • 1...Sd3
        • 2.Sxc6#
      • 1...Sg4
        • 2.Sxc6#
        • 2.Qf4#
      • 1...Sg6
        • 2.Kxg6#
        • 2.Sxc6#
      • 1...Sd7
        • 2.Sxc6#
        • 2.Qf4#
      • 1...Re1
        • 2.Sb3#
      • 1...Rd3
        • 2.Qf4#
      • 1...Sc3
        • 2.Sb3#
        • 2.bxc3#
      • 1...d5
        • 2.Qf4#
      • 1...Sd2!
  • Keys
    • 1.Kf8!
      • threat
        • 2.Qg4#
      • 1...Re1
        • 2.Rd3#
      • 1...Sd2
        • 2.Rd3#
      • 1...Sc3
        • 2.bxc3#
      • 1...f5
        • 2.Sxc6#
      • 1...f6
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);OGATE::P(A),XS(a)
    • P(h);::S(F)
  • Tries
    • Try
      • K(G);P_PINS(e),S_FLIGHT
      • Threat
        • QAR(I)
      • Vars
        • R(b);N_GUARD::R1(C)
        • S(a);S_CUTR(b)::R1(C)
        • S(a);OGATE::P(A),XS(a)
        • P(h);::S(F),XP(f)
        • P(h);N_SPINS(e)::S(F)
      • Refutation
        • R(b);CHECK
    • Try
      • Q(I);XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(e);N_GUARD,XP(E)::S(F),XP(f)
        • S(e);XQ(I)::B(J)+K(G),XS(e)
        • S(e);N_GUARD::S(F),XP(f)
        • R(b);::S(F)
        • R(b);::QAR2(I)
        • P(g);::QAR2(I)
      • Refutation
        • S(a);
  • Actual
    • K(G);P_PINS(e),S_FLIGHT
    • Threat
      • QAR(I)
    • Vars
      • R(b);N_GUARD::R1(C)
      • S(a);S_CUTR(b)::R1(C)
      • S(a);OGATE::P(A),XS(a)
      • P(h);::S(F),XP(f)
      • P(h);N_SPINS(e)::S(F)
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