MESON Chess Problem Database

Problem Display
PID: 270962 (8/4Q3/1pr2p2/3pqp1N/3bk3/2P2R1n/K3P3/3N1n2 w - - 0 1)

Hermanson, Halvar

Probleemblad, 1951

8/4Q3/1pr2p2/3pqp1N/3bk3/2P2R1n/K3P3/3N1n2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc3
      • 2.Sxf6#
    • 1...Rc4
      • 2.Sxf6#
    • 1...Rc5
      • 2.Sxf6#
    • 1...Rc7
      • 2.Sxf6#
    • 1...Rc8
      • 2.Sxf6#
    • 1...Sd2
      • 2.Sg3#
    • 1...Sh2
      • 2.Sg3#
    • 1...Se3
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sg1
      • 2.Rf4#
    • 1...Sf2
      • 2.Rf4#
    • 1...Sf4
      • 2.Rxf4#
    • 1...Sg5
      • 2.Rf4#
  • Keys
    • 1.Qb4!
      • threat
        • 2.Qb1#
      • 1...Rxc3
        • 2.Sxc3#
      • 1...Qh2
        • 2.Qxd4#
      • 1...Qg3
        • 2.Qxd4#
      • 1...Qf4
        • 2.Qxd4#
      • 1...Qd6
        • 2.Qxd4#
      • 1...Qc7
        • 2.Qxd4#
      • 1...Qb8
        • 2.Qxd4#
      • 1...Qe6
        • 2.Qxd4#
      • 1...Qe7
        • 2.Qxd4#
      • 1...Qe8
        • 2.Qxd4#
      • 1...Sd2
        • 2.Re3#
      • 1...Se3
        • 2.Rxe3#
      • 1...Sf2
        • 2.Sxf2#
      • 1...Sf4
        • 2.Sf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 9
    • REMOVED MATES = 8
  • Sets
    • R(i);N_GUARD,XP(D)::S(F),XP(j)
    • R(i);N_GUARD::S(F),XP(j)
    • S(a);N_GUARD::S(F)
    • S(a);N_GUARD::S(F),XS(a)
    • S(b);N_GUARD::R1(E)
    • S(b);N_GUARD::R1(E),XS(b)
  • Actual
    • Q(G);N_PINQ(f),P_PINB(c)
    • Threat
      • QAB(G)
    • Vars
      • R(i);XP(D)::S(A),XR(i)
      • Q(f);N_GUARD,P_PINP(C)::QAR1(G),XB(c)
      • Q(f);N_GUARD::QAR1(G),XB(c)
      • S(a);N_GUARD::R1(E)
      • S(a);N_GUARD::R1(E),XS(a)
      • S(b);N_GUARD::S(A),XS(b)
      • S(b);N_GUARD::S(A)
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